CN1560774A - Digital commodity transaction system and transaction method thereof - Google Patents

Abstract

The invention discloses a digital commodity transaction system and a transaction method thereof, which mainly carry out encryption processing on at least one digital commodity in a content download center to form an encrypted digital commodity, the encrypted digital commodity is directly sent to at least one content download point by an actual memory transmission line, when a consumer selects a digital commodity to be purchased, a content download card can be held to one of the content download points, the encrypted digital commodity to be purchased is directly stored by utilizing a physical transmission line and is connected with the content download center by a network transmission line, the content download center generates a card number decryption data according to a card number identification code and downloads the card number decryption data to the content download card, when the consumer wants to purchase the digital commodity, the content download card can be placed into a content card reader, and the content card reader can restore the decryption data and the encrypted commodity digital according to the card number identification code, to produce a digital good that can be read for use.

Description

Digital commodity trading system and its trading method

technical field

The invention relates to a digital commodity transaction system and a transaction method thereof, which can not only reduce the usage amount of digital commodities transmitted on the network and the waiting time for downloading, but also achieve the effect of preventing digital commodities from being pirated.

Background technique

With the rapid development of society, the knowledge industry is changing with each passing day, and the expressions presented by knowledge products are also in various forms, whether it is paper books, magazines, audio books, records, movies, animations, program software, game software, online games, MP3 etc., can effectively achieve its purpose of transmitting knowledge information, and people's demand for this kind of spiritual food has never stopped.

Traditionally, consumers obtain knowledge products mainly through on-site purchase or on-site rental. Consumers must go to bookstores, record stores, convenience stores, stores, book rental centers, and film rental centers to sell or rent them. The places where knowledge products are purchased can be purchased, and the knowledge products you want to buy can be obtained by cash or credit card transactions. However, in this transaction mode, it has the following disadvantages:

1. Knowledge products are presented in real objects one by one. The production of physical products will waste a lot of production costs and effective resources such as paper and CDs.

2. Physical goods are in the form of paper, and it is difficult to effectively reduce the inventory management or transportation costs of the physical goods.

3. It is difficult to estimate the sellable quantity of knowledge products in advance. If the sales situation is not good, knowledge products will not only occupy limited storage space, but also waste resources that have been produced.

4. If the product is slightly damaged during use, the entire product may be invalidated, such as damaged or missing pages in a book, and consumers must re-purchase, which is unfair to consumers.

5. Intellectual goods are easy to be imitated by a large number of pirated copies, obliterating the rights that the producers of intellectual goods should enjoy, which will not only cause social injustice, but also seriously hinder the vigorous development of intellectual goods.

6. Physical goods cannot be released or sold at the same time around the world at the same time, which will relatively reduce the opportunities for intellectual goods to gain momentum.

In addition, the knowledge industry has another transaction agreement mode, which mainly converts traditional physical goods into digital goods, and uses the convenience of the network to provide consumers with purchases.

The above-mentioned trading method of conventional digital goods, as shown in Figure 1, first digitizes various intellectual goods to become digital goods, and uses various advertising methods to let consumers know which digital goods are available, and consumers can To purchase the required digital goods, such as step 101. In addition, the consumer notifies the content distribution center (Content Distribution Center; CDC) that sells the digital product to be purchased, and informs the selected digital product to be purchased (step 103). In addition, the CDC will reach a purchase amount transaction agreement with the consumer, such as confirmation of purchase amount or online payment method, etc., as in step 105 . Finally, the consumer directly uses a network transmission line, cable transmission line (cable), telephone line, etc. to obtain or read the desired digital product by downloading and storing it (step 107).

Although the above-mentioned digital commodity transaction mode can achieve transaction convenience and reduce waste of resources. However, it still has the following disadvantages:

1. After digital products are downloaded and stored, they are prone to be imitated and sold by a large number of pirated copies, which will also cause social injustice and seriously hinder the vigorous development of intellectual products.

2. All digital products need to be downloaded directly through the network, and the bandwidth of the network is limited. This will not only increase the transmission time, but also easily cause the interruption of the transmission process, and it is necessary to retry the transmission and download many times, which will not only increase the data transmission and It is troublesome for the consumers, and it will also waste the time for the consumers to wait for the data to be downloaded.

3. Due to the limited network bandwidth, it is impossible to allow large-capacity digital goods to be sold and transmitted online, nor can it accommodate a large number of consumers to download digital goods online at the same time, so it is not conducive to the commercialization of digital goods.

Contents of the invention

The purpose of the present invention is to provide a digital commodity trading system, which can reduce the risk of digital commodities being illegally cracked and a large number of pirated copies. Therefore, it can not only effectively maintain the principle of social fairness and justice, but also protect the due interests of intellectual producers .

The secondary purpose of the present invention is to provide a digital commodity trading system, which can effectively solve the problem of limited network bandwidth in data transmission, and can greatly reduce the usage of network transmission and waiting time for downloading.

Another object of the present invention is to provide a digital commodity transaction system, which can not only calculate the purchase rate or reading rate of digital commodities relatively accurately, but also effectively curb the piracy of intellectual commodities.

Another object of the present invention is to provide a digital commodity trading system, which can easily generate the types of voices played by digital commodities in response to the actual needs of consumers, which not only helps the promotion of digital commodities, but also provides more diversified digital goods.

Another object of the present invention is to provide a digital commodity transaction system, through multiple security control mechanisms: log in the card number identification code of the content download card, decrypt the card number decryption data, check whether the card number identification code is checked by the content card reader Compatible with other decryption actions, CDC authentication mechanism, random changes to generate the decryption data of the card number or encrypted digital goods, etc., so it can effectively achieve the function that digital goods are not easy to be cracked or a large number of pirated copies.

Another object of the present invention is to provide a digital commodity transaction method, which can not only effectively solve the problem of limited network bandwidth in data transmission, but also effectively prevent the risk of mass piracy of intellectual commodities.

To achieve the above-mentioned purpose, in a preferred embodiment of the present invention, its digital commodity trading system mainly includes at least: a content download center for storing at least one digital commodity, and each digital commodity can be divided and defined as a A first part and a second part; several content download points, which can store the first part of digital goods through a CDC download line; and several content download cards, which can be connected to the content download point through a download point download line , and download the first part of at least one digital commodity stored in the content download point, and download the second part of the digital commodity through the content download point and a download point upload circuit.

To achieve the above purpose, in another embodiment of the present invention, the digital commodity trading method mainly includes: storing at least one digital commodity in a content download center, and dividing and defining each digital commodity into a first part and a The second part: the first part of the digital product is stored in at least one content download point through a CDC download circuit; the consumer selects at least one digital product to be purchased, and holds a content download card to the content download point; and The content download point of the content download center content download card directly downloads the first part of the digital goods to be purchased through a download point download line in the content download point, and downloads the digital goods to be purchased through the content download point and a download point upload line the second part of .

The present invention will be described in detail below with specific examples in conjunction with the accompanying drawings.

Description of drawings

Fig. 1 is a schematic flow chart of a conventional digital commodity trading method;

Fig. 2 is a schematic diagram of the system structure of a preferred embodiment of the digital commodity trading system of the present invention;

Fig. 3 is a schematic flow chart of the digital commodity transaction method of the present invention;

Fig. 4 is the structure schematic diagram of content downloading card of the present invention; And

Fig. 5 is a schematic diagram of the system structure of another embodiment of the present invention.

Description of reference signs: 20-digital commodity trading system; 21-content download center; 210-digital commodity; 211-encrypted digital commodity; 212-encrypted digital commodity storage; 213-CDC download line; 214-login data storage; 215-download point upload line; 216-decryption program; 217-download point download line; 219-download card upload and download line; 23-content download point; 231-encrypted digital commodity storage; 235-store number; 25-content download Card; 250-digital goods to be purchased; 259-card number identification code; 27-content card reader; 271-data processing device; 273-card number detection device; 275-card placement area; 277-peripheral connection interface; 279-card Reading machine number area; 29-peripheral device; 295-information product; 30-content storage; 31-content download area; 311-main storage area; 315-card number decryption data; 63-regional content download center; 633-regional center Download line; 653-content download point; 655-content download card; 67-monitoring center; 675-monitoring transmission line.

Detailed ways

First of all, please refer to the schematic diagram of the system structure and the flow diagram of the transaction method of a preferred embodiment of the present invention shown in Fig. 2 and Fig. 3; as shown in the figure, the transaction method of the digital commodity transaction system 20 of the present invention includes the following steps:

In step 401, various intellectual commodities such as books, comics, cartoons, movies, TV programs, records, MP3, software programs or game software are first digitized to become at least one digital commodity 210 and stored in a content download center 21 (Content Distribution Center; CDC), CDC21 performs an encryption procedure on the digital commodity 210 to generate at least one encrypted digital commodity 211, and the processed encrypted digital commodity 211 is stored in a content download center 21. Encrypted digital commodity storage 212. In addition to the encrypted digital commodity storage 212, the CDC 21 is also provided with at least one login data storage 214.

Step 402, the encrypted digital commodity 211 stored in the encrypted digital commodity storage 212 will be stored in the encrypted digital commodity storage 231 of at least one content download point 23 in advance through a CDC download circuit 213, and the content download point 23 It can be a bookstore, book rental center, film rental center, record store, convenience store, store, school or kindergarten.

The CDC download line 213 can be selected as a physical transmission line, network transmission line, cable transmission line (cable), telephone line or actual storage transfer line. Among them, the actual storage direct transmission line 213 refers to directly bringing the encrypted digital commodity storage 212 to each content download point 23 for placement or dumping by means of actual transportation, so as to reduce the transmission time of the encrypted digital commodity 211 on the network. Usage and waiting time for download. If the CDC download line 213 is other physical transmission lines, network transmission lines, axial cable transmission lines or telephone lines, then the time period when the network lines are relatively idle can also be selected for transmission, such as late at night or early in the morning, so as to make good use of the network Bandwidth purpose.

Step 403, the consumer uses various channels to learn about the types of digital goods 210 (or encrypted digital goods 211) available for purchase, and selects at least one digital product to be purchased (250).

In step 404, the consumer takes a content download card 25 to one of the content download points 23 to perform a purchase transaction of the digital product to be purchased (250; also referred to as the encrypted digital product to be purchased).

In step 405, the content download point 23 notifies the CDC 21 of the digital commodity 250 selected by the consumer via a download point upload line 215, and the CDC 21 registers the purchased content download card in its login data storage 214 The card number identification code (259 as shown in Figure 4) of 25 and the store number 235 of the content download point 23 that is gone to purchase.

Step 406, the CDC 21 will check the card number identification code 259 of the content download card 25 to further determine whether the content download card 25 has been stopped. If no, proceed to step 407; if yes, it means that the content download card 25 may be left with a bad record due to abnormal transaction behavior, so the content download point 23 and the consumer who wants to purchase will be notified to stop the purchase transaction Behavior, such as step 426.

Because each content download card 25, as shown in Figure 4, all has a unique card number identification code 259, the same as the identity data of this content download card 25, and every purchase behavior all needs to utilize this card number identification code 259 Upload to CDC 21 and log in, so if there are a plurality of content download cards 25 with the same card number identification code 259 at the same time for purchase; 25 but appear in different content download points 23 far away; or the content download card 25 with the same card number identification code 259 has been continuously requesting to purchase the same digital product 250 to be purchased, etc., then these can be regarded as Abnormal transactions can even be reasonably suspected to be a counterfeit card, and the content download card 25 recorded with the card number identification code 259 will be stopped from any subsequent purchases, so as to effectively prevent intellectual goods from being copied in large quantities Piracy of the crooked.

Step 407, through the consumer's notification, or the inspection process of the CDC 21, it will be possible to determine whether the purchased content download card 25 has ever purchased the desired digital product 250? If yes, go to step 427 ; if not, go to step 408 .

Step 427, if the digital commodity 250 that you want to purchase has been purchased before, if it is not in an abnormal transaction situation, it may mean that the previously purchased digital commodity 250 may be damaged or cannot be used again for other reasons, Based on the principles of serving consumers and social fairness, a second transaction agreement can be performed, such as re-purchasing the digital commodity 250 for free or at a lower price, and proceed to step 409 . In this way, there will be no regrets like the usual knowledge commodity trading model, if the content is slightly damaged, you need to buy it again or discard it. It not only makes good use of material resources, but also protects the interests of consumers.

Step 408 is a normal transaction behavior, so the first transaction agreement for shopping is completed according to the normal procedure, for example, the shopping price or payment method is determined. Since consumers go directly to the content download point 23 for shopping, they can choose cash, on-the-spot swiping of cards or online swiping of cards and other transaction methods, unlike the usual digital commodity transaction mode, where they can only choose to use online swiping of cards. Therefore, It can effectively reduce possible disputes and security issues that may arise from network payment.

Step 409, the shopping transaction agreement has been completed, and the consumer's content download card 25 can directly download the digital commodity 250 to be purchased stored in the encrypted digital commodity storage 231 of the content download point 23 through a download point download line 217 (It can also be referred to as the encrypted digital commodity to be purchased). Then connect with the CDC 21 via the download point upload line 215 of the content download point 23, and the CDC 21 will generate a card number decryption data ( 315 shown in FIG. 4 ), the card number decryption data 315 is only applicable to the content download card 25 and the digital commodity 250 to be purchased.

Of course, after the consumer's content download card 25 has stored the digital goods 250 to be purchased, he can also directly connect to the CDC 21 through a download card upload and download circuit 219 to download the decrypted data 315 of the stored card number without downloading the content again. Point 23, such a transaction model can facilitate the global issuance or sale of digital goods at the same time. Since the card number decryption data 315 downloaded online is not a data or program with a large memory, the required transmission and download time or transmission capacity is relatively significantly reduced compared with conventional digital products. Therefore, it is not easy for the transmission network bandwidth to be insufficient. The dilemma occurs, which is helpful for the promotion of digital goods.

In addition, when the CDC 21 generates the card number decryption data (315), in addition to the card number identification code 259 and a decryption program 216 stored in the login data storage 214, it can also be based on the date, time, download times, etc. The card number decryption data 315 is generated randomly (following a certain logic mode) or randomly (not following a certain logic mode) according to the data, so as to achieve the degree of difficulty for the data to be cracked.

The above-mentioned downloading point uploading line 215, downloading point downloading line 217 and downloading card uploading and downloading line 219 can be respectively selected as a physical transmission line, a network transmission line, an axis cable transmission line, a telephone line or an actual storage direct transmission line. However, the download line 217 of the download point is preferably a physical transmission line, such as a data transmission line, a USB cable or an RS232 transmission line, etc., because the data transmission speed of these physical transmission lines is about 480Mb/s, which is far greater than the network transmission speed of 1.5 Mb/s, the digital commodity 250 to be purchased can be stored in the content download card 25 of the consumer in a very short time. Again, download point upload circuit 215 and download card upload and download circuit 219 are then better with network transmission line, shaft cable transmission line or telephone line, because can connect to be positioned at remote CDC 21 like this, except the card number that can log in content download card 25 In addition to the identification code 259 and the store number 235 of the content download point 23, the card number decryption data 315 for purchasing the digital product 250 to be purchased can also be downloaded and stored.

Every time a consumer purchases a digital product 250 to purchase, he needs to connect to the CDC 21 to download the card number decryption data 315. Without the decryption action of the card number decryption data 315, the entire digital product 250 to be purchased cannot be decrypted or read. Therefore, it can effectively increase the difficulty of the digital commodity 210 being cracked and pirated.

When the consumer wants to start using or read the digital commodity 250 to be purchased, the content download card 25 that has stored the digital commodity 250 to be purchased must be placed in the card placement area 275 of a content card reader 27, the content The card number detection device 273 of the card reader 27 will check whether the card number decoding data 315 of the content download card 25 is compatible with the card number identification code 259? If it matches, then the data processor 271 is used to decrypt the card number decoding data 315 to restore the decoding program 216, and the decoding program 216 can decode and restore the digital commodity 250 (encrypted digital commodity 211) to be purchased. Actions resulting in the creation of a complete digital commodity 210 ready for reading or use. On the contrary, if not, the decryption and reading of the digital commodity 250 to be purchased will be stopped.

Therefore, the present invention can mainly use multiple security control mechanisms, such as: the card number identification code 259 of the login content download card 25, the decryption action of the card number decryption data 315, the inspection of the content card reader 27 to check whether the card number identification code 259 is Compatibility and other decryption actions; the authentication mechanism of CDC 21; and random changes to generate the decryption data 315 of the card number or encrypted digital goods 211, etc., so it can effectively achieve the function that digital goods are not easy to be cracked or a large number of pirated copies.

In addition, a peripheral device 29 is connected through a peripheral connection interface 277, such as audio-visual peripheral device, audio peripheral device, computer peripheral device, digital home appliance or information peripheral device, etc., so that the digital commodity 250 to be purchased can be easily used.

Of course, the above-mentioned peripheral equipment 29 can also be directly installed in the content card reader 27 for the convenience of consumers. Moreover, the content download card 25 can also be integrated with the content card reader 27 . And the content download card 25 is also not limited to be one such as SD card (Secure Digital card), CF card (Compact Flashcard), SM, MS, MMC (Multimedia Memory Card), PC card (PCMCIA), SmartMedia card, Memory Stick card or The card form of the MicroDrive miniature hard disk can also be applied to ordinary hard disks or data storage devices. The content card reader 27 can also be directly installed in information products 295 such as a computer system, a laptop computer, a mobile phone, a personal digital assistant system (PDA), MP3, a digital camera, a digital video camera or digital home appliances.

In another embodiment, the content card reader 27 can also be provided with a card reader machine number (district) 279 corresponding to the content download card 25, and a content download card 27 must be placed in the corresponding content card reader 27. be usable.

In yet another embodiment of the present invention, the content download card 25 can also directly upload the card number identification code 259 of the content download card 25 through the download card upload and download circuit 219, and download and store the digital product 250 to be purchased and the decryption data of the download card number. 315. In this way, in addition to achieving the goal of publishing or selling digital goods at the same time around the world, it can also effectively solve the convenience for users in remote areas to purchase digital goods. Moreover, since the purchase of digital goods 250 still requires a specific content download card 25 and download card number decryption data 315 to be used together, it still has the advantage of reducing digital goods being improperly cracked and being pirated in large quantities.

In addition, please refer to the structure schematic diagram of the content download card of the present invention shown in FIG. 4; And in each content storage 30, at least one content storage area 31 can be roughly divided, and each content storage area 31 is respectively provided with a main storage area 311 and a card number decryption data 315, and the card number decryption data 315 can be used for recording storage and The card number identification code 259 and the decryption program (216) related to the decryption action of the digital commodity 250 to be purchased can be performed. The main storage area 311 can be used to store the digital goods 250 to be purchased. Finally, please refer to the schematic diagram of the system structure of another embodiment of the present invention shown in Fig. 5; The local area is provided with at least one regional content download center 63, which can also directly store or place at least one encrypted digital commodity storage through a regional center download circuit 633 (its function is the same as the CDC download circuit 213 described in the previous embodiment). device 212 and a login data storage 214, and the content download card 655 or content download point 653 within its jurisdiction can directly connect with it to download the card number decryption data 315 and decryption program 216 for purchasing digital goods 250, without further Connect to CDC 21, so as to effectively disperse the number of network connections connected to CDC 21, so as to speed up the download time of digital goods to be purchased.

Due to different application regions, language habits or expressions may also be different. Therefore, the content of some encrypted digital products 211 can also be designed in different playback languages according to different actual needs, such as Chinese, Hokkien, Hakka, Cantonese, English or Japanese, etc., and when downloading the login data storage 214, different decryption programs 216 can also be downloaded according to the needs of consumers, and in the decryption process of the digital goods 250 to be purchased, the selected decryption program can be restored. Play the way of voice to provide consumers with more choices.

In order to provide knowledge producers, consumers, and mass media with a relatively fair and accurate information on the number of sales, reading rates, etc., or to facilitate industry statistics and charges, CDC 21, each content download point 23 or area The content download center 63 can also be connected to an impartial third-party monitoring center 67 through a monitoring transmission line 675. The monitoring center 67 can be a copyright association, non-governmental association, consumer center or financial center, etc., and can correctly record digital goods. Information such as the time or amount of each purchase.

In yet another embodiment of the present invention, it can also be applied in cable TV, and each content download point 23 just is just like the digital receiving code connector (SET-TOP BOX) of each family TV or other digital processing devices, cable line Encrypted digital goods 211 such as TV programs or movies that may be charged may be pre-stored in each digital receiving codec (23) when the line is relatively idle, and after the consumer selects the paid program that he wants to buy, the CDC 21 download the card number deciphering data 315 and deciphering program 216 that can remove this program again, such as five consumers can easily choose the program to watch and want to pay.

Moreover, the technology disclosed in the present invention can also be applied to academic institutions such as a school or a kindergarten. The school or kindergarten is just like the content download center 21, the regional content download center 63 or the content download point 653 described in the previous embodiment. The student's work or family contact book data to be delivered can be stored in a content download card 25 in the form of encrypted digital goods 211 and card number decryption data 315, and the student only needs to carry the content download card 25 home. After going home, the content download card 25 is placed in a content card reader 27, and the student's work or family contact book data can be read through the card number detection device 273 and the data processing device 271. Conversely, the homework completed by the students or the parents of the students want to respond to the teacher's message, which can also form another encrypted digital product 211 through the data processing device 271, and store it in the content download card 25. After being carried to the school, the teacher will also The homework of the students or the information of the parents of the students can be read through the card number detection device 273 and the data processing device 271 of the content card reader 27 . Since the above-mentioned encrypted digital goods 211 are all encrypted and need to cooperate with the relevant card number decryption data 315, even if they are lost, the data will not be easily leaked, and the purpose of data protection is achieved.

Of course, the content download card 25 that stores the student's homework or the response message of the student's parents can also upload the encrypted digital product to the CDC 21 or the content area center 63 through the download line 219 of the download card, so that the CDC 21 or the content The regional center 63 can count or process the data provided by the user, and use it for subsequent added value.

Although in each of the above-mentioned embodiments, the purchase of digital goods 250 is described as a one-off transaction mode, in fact, according to the disclosed technology of the digital commodity trading system and its trading method of the present invention, it can also be applied to digital goods 210 For example, the leased digital commodity 210 is set to be valid for one day, one week, or one month (the lease period), and another new card number can be generated in the card number decryption data 315 relative to the lease period data For the decryption data 315, during the rental period (commodity validity period), the content card reader 27 and the content download card 25 all operate normally, but once the commodity validity period arrives, the card number decryption data 315 or the digital commodity 210 to be leased will be automatically released. Damaged or destroyed, the rental transaction of digital goods can be completed in this way.

Claims (31)

1. A digital commodity trading system, including: A content download center, used to store at least one decryption program and at least one encrypted digital product produced by subjecting a digital product to an encryption program; At least one content download point, downloading and storing the encrypted digital commodity through a CDC download line; several content download cards, connected to the content download point through a download point download line, and selecting and downloading and storing the encrypted digital commodity One intends to purchase a digital commodity, and then downloads the decryption program corresponding to the desired digital commodity through an upload line through a download point through a content download point; and At least one content card reader can be used to place the content download card, and decrypt the digital commodity to be purchased according to the decryption program to restore the digital commodity that can be read. 2. The digital commodity trading system as claimed in claim 1, wherein at least one content memory and a card number identification code are provided in the content download card. 3. The digital commodity transaction system as claimed in claim 2, wherein the content download center includes at least one encrypted digital commodity storage and at least one login data storage, the encrypted digital commodity storage stores the encrypted digital commodity, the login The data storage device stores the card number identification code and the decryption program, and selects one of the card number identification code, date, time, download times, commodity valid period, the decryption program and its combination to generate a card number decryption data. 4. The digital commodity transaction system as claimed in claim 3, wherein the content storage includes at least one content download area, each content download area includes the card number decryption data and a main storage that can be used to store the digital commodity to be purchased district. 5. The digital commodity trading system as claimed in claim 1, wherein the content card reader is equipped with a card reader machine number area, a data processing device, a card number detection device, a card placement slot, a peripheral connection interface, and an audio-visual peripheral One of audio equipment, audio peripherals, computer peripherals, information peripherals, and combinations thereof. 6. The digital commodity trading system as claimed in claim 1, wherein the CDC download line, download point upload line and download point download line can be respectively selected as a physical transmission line, network transmission line, axis cable transmission line, telephone line, One of memory transfer lines and combinations thereof. 7. The digital commodity trading system as claimed in claim 1, wherein the content download card is directly connected to the content download center through a download card upload and download circuit, and thereby selects to directly download the decryption program, the digital commodity to be purchased One of its combination, and the uploading and downloading line of the download card can be selected as one of a physical transmission line, a network transmission line, an axial cable transmission line, a telephone line, a storage transmission line and a combination thereof. 8. The digital commodity trading system as claimed in claim 1, further comprising a regional content download center, which can directly store the encrypted digital commodity and the decryption program of the digital commodity through a regional center download line. 9. The digital commodity trading system as claimed in claim 1, wherein the content download card can also be selected as an SD card, CF card, SM, MS, MMC, MicroDrive micro hard disk, PC card, SmartMedia card, Memory Stick card , a hard disk, a content card reader, a data storage device and a combination thereof. 10. The digital commodity trading system as claimed in claim 1, wherein the content download card is directly fixed in the content card reader, and is integrated with the content card reader. 11. The digital commodity trading system as claimed in claim 1, wherein the content reading can be directly fixed in an information product. 12. The digital commodity transaction system according to claim 1, comprising at least one monitoring center, which can be selectively connected to one of the content download center, content download point and a combination thereof through a monitoring transmission line. 13. The digital commodity transaction system as claimed in claim 1, wherein the content download point can be selected as a bookstore, book rental center, film rental center, record store, convenience store, store, digital receiver, school, kindergarten and one of its combinations. 14. The digital commodity transaction system as claimed in claim 1, wherein the content download point includes a store number. 15. A digital commodity trading method, comprising the following steps: storing at least one digital commodity in a content download center, and encrypting each digital commodity to become an encrypted digital commodity, and each encrypted digital commodity has a corresponding decryption program; storing the encrypted digital commodity in at least one content download point through a CDC download circuit; The consumer selects at least one digital commodity to purchase from the encrypted digital commodity, and holds a content download card to the content download point; The content download card directly downloads the digital commodity to be purchased through a download point download line in the content download point, and downloads the decryption program corresponding to the digital commodity to be purchased through the content download point and a download point upload line; and The content download card is placed in a content card reader, and the digital commodity to be purchased is decrypted by the decryption program to restore the digital commodity that can be read. 16. The digital commodity transaction method as claimed in claim 15, comprising the following steps: the content download center selects one of a card number identification code registered in the content download card, a store number of the content download point and a combination thereof. 17. The digital commodity trading method as claimed in claim 16, further comprising the following steps: the content download center selects the card number identification code, date, time, download times, valid period of the commodity, the decryption program and one of its combinations. A card number decryption data is generated, and the card number decryption data is stored in the content download card through the upload line of the download point. 18. The digital commodity transaction method as claimed in claim 17, further comprising the following steps: the content card reader will detect whether the decrypted data of the card number in the content download card is compatible with the content identification code, and if not, stop processing and Read the digital goods you want to buy. 19. The digital commodity transaction method according to claim 15, further comprising the following steps: judging whether the content download card has been disabled, if so, stop the purchase and sale of the content download point; if not, continue to complete the purchase. 20. The digital commodity transaction method as claimed in claim 15, further comprising the following steps: judging whether the content download card has ever purchased the digital commodity to be purchased, if yes, then complete a second shopping transaction agreement; if not, continue to complete 1. The first shopping transaction agreement. 21. The digital commodity transaction method as claimed in claim 15, further comprising the following steps: the consumer directly connects to the content download center through a download card upload and download line, and can choose to directly download the decryption program, the desired Buy a digital item and one of its combinations. 22. The digital commodity transaction method as claimed in claim 15, wherein the CDC download line, download point upload line and download point download line can be selected as a physical transmission line, network transmission line, axial cable transmission line, telephone line, storage to one of the transfer lines and combinations thereof. 23. The digital commodity trading method as claimed in claim 15, further comprising the following steps: setting up at least one regional content download center, and directly storing the encrypted digital commodity and the decryption program through the download line of the regional center. 24. The digital commodity transaction method as claimed in claim 15, wherein the content download card can be selected as an SD card, CF card, SM, MS, MMC, MicroDrive micro hard disk, PC card, SmartMedia card, Memory Stick card, One of a hard disk, a content card reader, a data storage device and a combination thereof. 25. The digital commodity transaction method as claimed in claim 15, wherein the content card reader can also be directly fixed in an information product. 26. The digital commodity transaction method according to claim 15, further comprising a monitoring center, which can be connected to one of the content download center, content download point and a combination thereof through a monitoring transmission line. 27. The digital commodity trading method as claimed in claim 15, wherein the content download point also includes a store number, and the content download point can be selected as a bookstore, book rental center, film rental center, record store, convenience store, or store , digital receiver codec, school, kindergarten and any combination thereof. 28. The digital commodity transaction method as claimed in claim 15, wherein the content card reader is optionally equipped with a card reader machine number area, a data processing device, a card number detection device, a card placement slot, a peripheral connection interface, and an audio-visual peripheral One of audio equipment, audio peripherals, computer peripherals, information peripherals, and combinations thereof. 29. The digital commodity transaction method as claimed in claim 15, further comprising the following steps: inputting a digital data into the content card reader and encrypting it to become another encrypted digital commodity. 30. The digital commodity transaction method as claimed in claim 15, further comprising the following steps: the consumer chooses to directly connect and upload an encrypted digital commodity to the content download center or a regional content download center through a download card upload and download line and one of its combinations. 31. The digital commodity transaction method as claimed in claim 17, further comprising the following steps: the decrypted data of the card number will check whether the valid period of the commodity has been reached at any time, once it is judged that the valid period of the commodity has been reached, the decrypted data of the card number will be selected, Purchased digital goods and one of their combinations will be destroyed.

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