JP2001285284A - Transmitter and its transmission method - Google Patents
Transmitter and its transmission methodInfo
- Publication number
- JP2001285284A JP2001285284A JP2000094851A JP2000094851A JP2001285284A JP 2001285284 A JP2001285284 A JP 2001285284A JP 2000094851 A JP2000094851 A JP 2000094851A JP 2000094851 A JP2000094851 A JP 2000094851A JP 2001285284 A JP2001285284 A JP 2001285284A
- Authority
- JP
- Japan
- Prior art keywords
- receiving device
- local network
- transmitting
- authentication
- receiving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000005540 biological transmission Effects 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004891 communication Methods 0.000 abstract description 20
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 101100321445 Arabidopsis thaliana ZHD3 gene Proteins 0.000 description 1
- 102100034871 C-C motif chemokine 8 Human genes 0.000 description 1
- 101000946794 Homo sapiens C-C motif chemokine 8 Proteins 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Storage Device Security (AREA)
- Information Transfer Between Computers (AREA)
- Data Exchanges In Wide-Area Networks (AREA)
- Small-Scale Networks (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、著作権保護を実現
する機能を備えた送信装置およびその送信方法に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission device having a function of realizing copyright protection and a transmission method thereof.
【０００２】[0002]
【従来の技術】近年の、デジタル化・ネットワーク化の
進展に伴って、デジタル情報家電と呼ばれる商品が増加
して来ている。デジタル情報家電は、デジタル放送の開
始に伴い、普及が期待される商品群である。このデジタ
ル情報家電には、デジタル放送対応テレビや、セットト
ップボックス、デジタルVTR、DVDプレーヤ、ハードディ
スクレコーダ等、デジタルデータ・デジタルコンテンツ
を扱う商品が広く含まれる。2. Description of the Related Art With the recent progress of digitization and networking, products called digital information home appliances have been increasing. Digital information home appliances are a group of products expected to spread with the start of digital broadcasting. The digital information home appliances include a wide range of products that handle digital data and digital contents, such as digital broadcast-compatible televisions, set-top boxes, digital VTRs, DVD players, and hard disk recorders.
【０００３】このようなデジタル情報家電を利用する際
に、考慮すべき事柄の一つとして、著作物の著作権によ
る保護、が挙げられる。デジタルデータは、コピー時の
品質劣化がない等の利点が強調される反面、不正コピー
が容易である等の欠点を持っているためである。たとえ
ばデジタルAV機器どうしを接続するデジタルネットワー
クであるIEEE1394には、著作権侵害の防止のため、認証
・鍵交換機構や、データ暗号化の機能が備えられる。[0003] One of the things to consider when using such digital information appliances is protection of copyrighted works by copyright. This is because digital data emphasizes advantages such as no quality deterioration at the time of copying, but has disadvantages such as easy unauthorized copying. For example, IEEE1394, which is a digital network connecting digital AV devices, has an authentication / key exchange mechanism and a data encryption function to prevent copyright infringement.
【０００４】ここで、著作権保護が必要なAVデータを、
送信装置から受信装置に転送する場合を考える。この転
送において、注意すべき点は、個人あるいは家族の楽し
む範囲内で、著作権保護の必要なAVデータのやり取りを
行なうことが、著作権保護の前提である点である。そし
て、他人との間でのAVデータのやり取りは、視聴料や著
作権料等の支払いが伴わない限り、行われるべきではな
いという点である。[0004] Here, AV data requiring copyright protection is
Consider the case of transferring from a transmitting device to a receiving device. A point to be noted in this transfer is that the exchange of AV data requiring copyright protection is a premise of copyright protection within the range of enjoyment by individuals or families. Further, exchange of AV data with another person should not be performed unless payment of a viewing fee, a copyright fee, or the like is accompanied.
【０００５】[0005]
【発明が解決しようとする課題】近い将来、デジタルネ
ットワークの種類は、無線や、パソコンネットワーク
等、いろいろな種類に増加するものと考えられるが、こ
れらの多くについては、未だ著作権保護が考慮されてい
ないのが現状である。In the near future, the types of digital networks are expected to increase to various types, such as wireless networks and personal computer networks, but many of these still require copyright protection. It is not at present.
【０００６】また、ネットワークはローカルなものから
グローバルなものまで幅広くあり、上記で説明したよう
に、著作権保護の観点からは、明確に区別することが必
要がある。Further, networks are wide ranging from local networks to global networks, and as described above, it is necessary to clearly distinguish them from the viewpoint of copyright protection.
【０００７】本発明は、このような課題を解決し、受信
装置がローカル網上に存在するか否かを確認すること
で、ローカル網上に存在する受信装置のみと認証・鍵交
換を実行できる送信装置、およびその送信方法を提供す
ることを目的とする。[0007] The present invention solves such a problem, and it is possible to execute authentication / key exchange only with a receiving device existing on the local network by checking whether the receiving device exists on the local network. It is an object to provide a transmission device and a transmission method thereof.
【０００８】[0008]
【課題を解決するための手段】上記課題を解決するた
め、本発明は、特定の端末のみが接続可能なローカル網
に接続され、暗号化されたデータを受信装置に送信する
送信装置であり、受信装置に暗号化データを送信する送
信部と、受信装置がローカル網に接続されているか否か
を判断する判断部と、ローカル網に接続されていると判
断された受信装置のみとの間で、認証・鍵交換を実行す
る認証・鍵交換部と、から構成される送信装置であるこ
とを第１の特徴とする。ここで、「ローカル網」とは、
個人の範囲内、あるいは家族間でのデータのやりとりが
行なわれる網であり、たとえばIEEE1394等のホームネッ
トワークである。According to the present invention, there is provided a transmitting apparatus connected to a local network to which only a specific terminal can be connected, and transmitting encrypted data to a receiving apparatus. A transmission unit that transmits the encrypted data to the receiving device, a determining unit that determines whether the receiving device is connected to the local network, and only the receiving device that is determined to be connected to the local network. , An authentication / key exchange unit that executes an authentication / key exchange. Here, "local network"
This is a network for exchanging data within the range of an individual or between families, for example, a home network such as IEEE1394.
【０００９】本発明の第１の特徴では、このローカル網
内に閉じた通信のみを、個人あるいは家族間で楽しむた
めの通信とみなすことで、著作権保護を行なうべきデー
タのやりとりを許容する。そして、このローカル網で閉
じない通信は、個人あるいは家族間で楽しむための通信
とみなすことができないため、著作権保護を行なうべき
データのやりとりを許容しない。このため、データ再生
を要求する受信装置がローカル網上に存在するか否かを
あらかじめ判断し、その判断結果に基づいて、受信装置
と認証・鍵交換を実行することで、著作権保護を考慮し
たデータのやりとりが可能となる。すなわち、ローカル
網に接続された受信装置のみが、認証・鍵交換を実行
し、それにより、暗号化されたデータを復号できるよう
になる。According to the first feature of the present invention, the exchange of data to be copyright protected is permitted by regarding only the communication closed in the local network as communication for enjoying between individuals or families. Since communication that cannot be closed by the local network cannot be regarded as communication for enjoyment between individuals or families, exchange of data to be copyright protected is not permitted. For this reason, it is determined in advance whether a receiving device that requests data reproduction exists on the local network, and based on the result of the determination, authentication and key exchange with the receiving device are performed, thereby taking copyright protection into consideration. It becomes possible to exchange the data. That is, only the receiving device connected to the local network performs the authentication and key exchange, and thereby can decrypt the encrypted data.
【００１０】本発明の第２の特徴は、上記の第１の特徴
で述べた送信装置が実現する送信方法に係り、特定の端
末のみが接続可能なローカル網に接続された送信装置か
ら暗号化されたデータを受信装置に送信する送信方法で
あって、その受信装置からのデータ送信要求を受け取る
工程と、そのデータ送信要求に基づき、受信装置に暗号
化データを送信する工程と、受信装置からの認証要求を
受け取る工程と、受信装置がローカル網に接続されてい
るか否かを判断する工程と、受信装置がローカル網に接
続されていると判断された場合のみ、受信装置との間
で、認証・鍵交換を実行する工程と、を少なくとも含む
送信方法であることである。[0010] A second aspect of the present invention relates to a transmission method realized by the transmission apparatus described in the first aspect, and performs encryption from a transmission apparatus connected to a local network to which only a specific terminal can be connected. Transmitting a received data to the receiving device, receiving a data transmission request from the receiving device, based on the data transmission request, transmitting encrypted data to the receiving device, from the receiving device Receiving the authentication request of, and the step of determining whether the receiving device is connected to the local network, and only when it is determined that the receiving device is connected to the local network, between the receiving device And a step of performing authentication / key exchange.
【００１１】[0011]
【発明の実施の形態】以下、図面を参照して本発明の実
施の形態について詳細に説明する。以下の図面の記載に
おいて、同一または類似の部分には同一または類似の符
号を付している。Embodiments of the present invention will be described below in detail with reference to the drawings. In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals.
【００１２】図１は、本発明の実施の形態に係る送信装
置が配置された、ネットワーク・システムの全体構成を
示すブロック図である。図１に示すように、本発明の実
施の形態に係る送信装置１０は、イーサネット（登録商
標）等のローカル網１２に接続される。そして、ローカ
ル網１２にルータ１４が接続され、ルータ１４によっ
て、ローカル網１０とインターネット１６とが接続され
る。ローカル網１２には受信装置１８ａが接続され、イ
ンターネット１６には受信装置１８ｂが接続され、受信
装置１８ａおよび１８ｂの両方が、送信装置１０から送
信されるAVデータを受信しようとすることになる。AVデ
ータとしてはたとえば、テキストや、写真、イラスト、
絵画、アニメ、映画、音楽、音声、テレビ番組、WWWデ
ータ等が挙げられる。ここでは、説明の簡単化を図るた
め、AVデータの一部に著作物が含まれる、あるいはAVデ
ータ自体が著作物であるとする。FIG. 1 is a block diagram showing an overall configuration of a network system in which a transmitting apparatus according to an embodiment of the present invention is arranged. As shown in FIG. 1, a transmitting apparatus 10 according to an embodiment of the present invention is connected to a local network 12 such as Ethernet (registered trademark). Then, a router 14 is connected to the local network 12, and the local network 10 and the Internet 16 are connected by the router 14. The receiving device 18a is connected to the local network 12, the receiving device 18b is connected to the Internet 16, and both the receiving devices 18a and 18b try to receive the AV data transmitted from the transmitting device 10. Examples of AV data include text, photos, illustrations,
Examples include paintings, animations, movies, music, audio, television programs, and WWW data. Here, in order to simplify the description, it is assumed that a copyrighted work is included in a part of the AV data, or that the AV data itself is a copyrighted work.
【００１３】ここで、送信装置１０から受信装置１８ａ
および１８ｂに、著作権保護の必要なAVデータを転送す
る場合を考える。この場合、注意すべき点は、従来の技
術の説明でも述べたように、個人、あるいは拡大解釈し
て家族の楽しむ範囲内で、AVデータのやりとりを行なう
ことが著作権保護の前提であり、他人との間のAVデータ
のやりとりは、視聴料や著作権料の支払いが伴わない限
り、行なわれるべきではないということである。たとえ
ば他人との間でのデータのやりとりとしては、インター
ネットや電話網等の公衆網を介したオープンな通信が挙
げられ、個人の範囲内、あるいは家庭間のデータのやり
とりの典型例として、IEEE1394等のホームネットワーク
に閉じた通信が挙げられる。Here, the transmitting device 10 transmits the data to the receiving device 18a.
And 18b to transfer AV data requiring copyright protection. In this case, it should be noted that, as described in the description of the conventional technology, it is a premise of copyright protection that the AV data is exchanged within the range of the individual or the family enjoyed by expanding the interpretation. This means that exchange of AV data with other people should not be performed unless payment for viewing and copyright fees is involved. For example, data exchange with another person includes open communication via a public network such as the Internet or a telephone network. A typical example of data exchange within an individual or between homes is IEEE1394 or the like. Closed communication on the home network of the Internet.
【００１４】そこで、著作権保護を行なうため、図１の
ネットワーク・システムにおけるAVデータの転送に関
し、次の２つの規則を用いる。In order to protect the copyright, the following two rules are used for the transfer of AV data in the network system shown in FIG.
【００１５】（Ａ）ローカル網１２に閉じた通信は、著
作権保護を行なうべきAVデータのやりとりを許容する。(A) Communication closed to the local network 12 allows exchange of AV data to be protected.
【００１６】（Ｂ）ローカル網１２で閉じない通信は、
著作権保護を行なうべきAVデータのやりとりを許容しな
い。(B) Communication not closed by the local network 12
Does not allow the exchange of AV data that should be copyright protected.
【００１７】ここで、上記（Ａ）の規則は、ローカル網
１２で閉じた通信は、個人あるいは家庭間で楽しむため
の通信と見なすことができるからであり、上記（Ｂ）の
規則は、ローカル網１２で閉じない通信は、個人あるい
は家庭間で楽しむための通信と、通常、見なすことがで
きないからである。Here, the rule (A) is because communication closed in the local network 12 can be regarded as communication for enjoying between individuals or homes, and the rule (B) is defined as local communication. This is because communication that cannot be closed by the network 12 cannot be generally regarded as communication for enjoying between individuals or homes.
【００１８】図２は、本発明の実施の形態に係る送信装
置の構成を示すブロック図である。図２に示すように、
この実施の形態に係る送信装置１０は、受信装置１８
（１８ａ，１８ｂ）との間での認証・鍵交換処理を実行
する認証・鍵交換処理部２０と、認証・鍵交換処理を要
求する受信装置１８との通信が、上記の（Ａ）および
（Ｂ）の規則のいずれに該当するかを判断するローカル
通信判断部２２と、暗号化されたAVデータを受信装置１
８に送信する送信部２４と、ローカル網１２とのインタ
ーフェースとなるネットワークインターフェース２６
と、から構成される。図２では、ローカル通信判断部２
２は、認証・鍵交換処理部２０内に配置されているが、
もちろん、認証・鍵交換処理部２０外に配置されてもも
ちろん構わない。FIG. 2 is a block diagram showing a configuration of the transmitting apparatus according to the embodiment of the present invention. As shown in FIG.
The transmitting device 10 according to this embodiment includes a receiving device 18
The communication between the authentication / key exchange processing unit 20 that executes the authentication / key exchange processing with (18a, 18b) and the receiving device 18 that requests the authentication / key exchange processing is performed by the above (A) and (A). B) the local communication determination unit 22 that determines which of the rules applies, and the receiving device 1
And a network interface 26 serving as an interface with the local network 12.
And In FIG. 2, the local communication determination unit 2
2 is located in the authentication / key exchange processing unit 20,
Of course, it may be arranged outside the authentication / key exchange processing unit 20.
【００１９】次に、図３ないし図５を参照して、本発明
の実施の形態に係る送信装置の動作について説明する。
図３は、本発明の実施の形態に係る送信装置１０と、ロ
ーカル網１２に接続された受信装置１８ａと、の間の処
理シーケンスチャートであり、図４は、本発明の実施の
形態に係る送信装置１０と、インターネット１６に接続
された受信装置１８ｂと、の間の処理シーケンスチャー
トであり、図５は、本発明の実施の形態に係る送信装置
１０の送信方法の処理手順を示すフローチャートであ
る。Next, the operation of the transmitting apparatus according to the embodiment of the present invention will be described with reference to FIGS.
FIG. 3 is a processing sequence chart between the transmitting device 10 according to the embodiment of the present invention and the receiving device 18a connected to the local network 12, and FIG. 4 is according to the embodiment of the present invention. FIG. 5 is a processing sequence chart between the transmitting device 10 and the receiving device 18b connected to the Internet 16, and FIG. 5 is a flowchart showing a processing procedure of a transmitting method of the transmitting device 10 according to the embodiment of the present invention. is there.
【００２０】（イ）送信装置１０と受信装置１８ａとの
間の通信 （１）図３のステップＳ１０１において、受信装置１８
ａが、ローカル網１２を介して、送信装置１０に対し
て、AVデータの再生を要求する（図５のステップＳ３０
１）。AVデータの再生要求は、たとえばオーディオ・ビ
ジュアル・コントロール（AV/C）コマンドを用いて、再
生要求のコマンドを発行することで、行われる。(A) Communication between the transmitting device 10 and the receiving device 18a (1) In step S101 of FIG.
a requests the transmission device 10 to reproduce the AV data via the local network 12 (step S30 in FIG. 5).
1). The request for reproducing the AV data is made by issuing a command for the reproduction request using, for example, an audio visual control (AV / C) command.
【００２１】（２）図３のステップＳ１０２において、
AVデータの送信要求を受けた送信装置１０は、著作権保
護のため、暗号化鍵K1で暗号化されたAVデータを、ロー
カル網１２を介して、受信装置１８ａに送信する（図５
のステップＳ３０２）。(2) In step S102 of FIG.
Upon receiving the request for transmitting the AV data, the transmitting device 10 transmits the AV data encrypted with the encryption key K1 to the receiving device 18a via the local network 12 for copyright protection (FIG. 5).
Step S302).
【００２２】（３）図３のステップＳ１０３において、
暗号化されたAVデータを受信した受信装置１８ａは、送
信装置１０に対して、認証・鍵交換を要求する（図５の
ステップＳ３０３）。(3) In step S103 of FIG.
The receiving device 18a that has received the encrypted AV data requests the transmitting device 10 for authentication and key exchange (step S303 in FIG. 5).
【００２３】（４）図３のステップＳ１０４において、
認証・鍵交換要求を受けた送信装置１０は、その認証・
鍵交換要求のパケットに基づいて、受信装置１８ａがロ
ーカル網１２上に存在するか否かを判断する（図５のス
テップＳ３０４）。ローカル網１２上に存在すると判断
できる基準として、たとえば次の２つが挙げられる。(4) In step S104 of FIG.
The transmitting device 10 that has received the authentication / key exchange request
Based on the packet of the key exchange request, it is determined whether or not the receiving device 18a exists on the local network 12 (step S304 in FIG. 5). Criteria that can be determined to exist on the local network 12 include, for example, the following two.
【００２４】（Ｃ）認証・鍵交換要求パケットのソース
アドレス、すなわち受信装置１８ａのアドレス、のサブ
ネットIDが、送信装置１０自身のサブネットIDと一致す
ること。(C) The subnet ID of the source address of the authentication / key exchange request packet, that is, the address of the receiving device 18a, matches the subnet ID of the transmitting device 10 itself.
【００２５】（Ｄ）IPv6パケットのスコープフィールド
がローカルスコープを示していること。(D) The scope field of the IPv6 packet indicates a local scope.
【００２６】なお、この判断は、受信装置１８ａからの
再生要求のパケットに基づいて、実行しても、もちろん
構わない。また、これら再生要求のパケットおよび認証
・鍵交換要求のパケットは、その転送中に、改ざん等が
なされてしまうと、正確な判断を行なうことができなく
なる。このため、各パケットのソースアドレスおよびス
コープフィールドそれぞれの値に、改ざん検出のための
署名等を施すべきである。It should be noted that this determination may be executed based on a packet of a reproduction request from the receiving device 18a. In addition, if the reproduction request packet and the authentication / key exchange request packet are falsified during the transfer, accurate determination cannot be performed. Therefore, a signature or the like for falsification detection should be applied to the value of the source address and the scope field of each packet.
【００２７】（５）受信装置１８ａはローカル網１２上
に存在するので（図５のステップＳ３０４ＹＥＳ）、図
３のステップＳ１０５において、送信装置１０は、受信
装置１８ａとの間で、認証・鍵交換を実行する（図５の
ステップＳ３０６）。この認証・鍵交換によって、受信
装置１８ａは、暗号化ＡＶデータの復号のために必要な
復号鍵を入手する。たとえば、利用される暗号技術が共
通鍵暗号であれば、復号鍵は暗号化鍵K1と同一である。(5) Since the receiving device 18a exists on the local network 12 (step S304 YES in FIG. 5), in step S105 in FIG. 3, the transmitting device 10 performs authentication and key exchange with the receiving device 18a. (Step S306 in FIG. 5). By this authentication and key exchange, the receiving device 18a obtains a decryption key necessary for decrypting the encrypted AV data. For example, if the encryption technology used is a common key encryption, the decryption key is the same as the encryption key K1.
【００２８】（６）図３のステップＳ１０６において、
復号鍵K1を入手した受信装置１８ａは、先に受信したAV
データを復号する。(6) In step S106 of FIG.
The receiving device 18a that has obtained the decryption key K1
Decrypt the data.
【００２９】（ロ）送信装置１０と受信装置１８ｂとの
間の通信 （１）図４のステップＳ２０１において、受信装置１８
ｂが、インターネット１６、ルータ１４およびローカル
網１２、を介して、送信装置１０に対して、AVデータの
再生を要求する（図５のステップＳ３０１）。上記
（イ）の場合と同様、AVデータの再生要求は、たとえば
オーディオ・ビジュアル・コントロール（AV/C）コマン
ドを用いて、再生要求のコマンドを発行することで、行
われる。(B) Communication between the transmitting device 10 and the receiving device 18b (1) In step S201 of FIG.
b requests the transmission device 10 to reproduce the AV data via the Internet 16, the router 14, and the local network 12 (step S301 in FIG. 5). As in the case of the above (a), a request for reproducing AV data is made by issuing a reproduction request command using, for example, an audio-visual control (AV / C) command.
【００３０】（２）図４のステップＳ２０２において、
AVデータの送信要求を受けた送信装置１０は、著作権保
護のため、暗号化鍵K1で暗号化されたAVデータを、ロー
カル網１２、ルータ１４およびインタネット１６を介し
て、受信装置１８ｂに送信する（図５のステップＳ３０
２）。(2) In step S202 of FIG.
Upon receiving the AV data transmission request, the transmitting device 10 transmits the AV data encrypted with the encryption key K1 to the receiving device 18b via the local network 12, the router 14, and the Internet 16 for copyright protection. (Step S30 in FIG. 5)
2).
【００３１】（３）図４のステップＳ２０３において、
暗号化されたAVデータを受信した受信装置１８ｂは、送
信装置１０に対して、認証・鍵交換を要求する（図５の
ステップＳ３０３）。(3) In step S203 of FIG.
The receiving device 18b that has received the encrypted AV data requests the transmitting device 10 for authentication and key exchange (step S303 in FIG. 5).
【００３２】（４）図４のステップＳ２０４において、
認証・鍵交換要求を受けた送信装置１０は、その認証・
鍵交換要求のパケットに基づいて、受信装置１０ｂがロ
ーカル網１２上に存在するか否かを判断する（図５のス
テップＳ３０４）。(4) In step S204 of FIG.
The transmitting device 10 that has received the authentication / key exchange request
Based on the key exchange request packet, it is determined whether the receiving device 10b exists on the local network 12 (step S304 in FIG. 5).
【００３３】（５）受信装置１８ｂはローカル網１２上
に存在しないので（図５のステップＳ３０４ＮＯ）、図
４のステップＳ２０５において、送信装置１０は、受信
装置１８ｂに対して、認証不許可を通知する（図５のス
テップＳ３０５）。この認証不許可によって、受信装置
１８ｂは、先に受信したAVデータを復号するために必要
な復号鍵を入手することができない。このため、ローカ
ル網１２上に存在しない受信装置１８ｂが、不正にAVデ
ータを入手することを、未然に防ぐことが可能となる。(5) Since the receiving device 18b does not exist on the local network 12 (NO in step S304 in FIG. 5), in step S205 in FIG. 4, the transmitting device 10 notifies the receiving device 18b that the authentication is not permitted. (Step S305 in FIG. 5). Due to this authentication disapproval, the receiving device 18b cannot obtain the decryption key necessary for decrypting the previously received AV data. For this reason, it is possible to prevent the receiving device 18b not existing on the local network 12 from illegally acquiring AV data.
【００３４】このように、本発明の実施の形態によれ
ば、ローカル網上に存在する受信装置のみに対して、著
作権保護の必要なAVデータを送信することが可能とな
る。このため、近年のデジタル化・ネットワーク化に伴
って増加する一方である、ネットワーク上で送信される
著作物を適切に保護することが可能となり、その重要性
はきわめて高いものである。As described above, according to the embodiment of the present invention, it is possible to transmit AV data requiring copyright protection only to a receiving device existing on a local network. For this reason, it is possible to appropriately protect a copyrighted work transmitted on a network, which is increasing with the recent digitization and networking, and its importance is extremely high.
【００３５】[0035]
【発明の効果】本発明によれば、受信装置がローカル網
上に存在するか否かを確認することで、ローカル網上に
存在する受信装置のみと認証・鍵交換を実行する送信装
置を実現できる。According to the present invention, it is possible to realize a transmitting device that executes authentication and key exchange only with a receiving device existing on a local network by checking whether the receiving device exists on a local network. it can.
【００３６】本発明によれば、受信装置がローカル網上
に存在するか否かを確認することで、ローカル網上に存
在する受信装置のみと認証・鍵交換を実行する送信方法
を実現できる。According to the present invention, it is possible to realize a transmission method for executing authentication and key exchange only with a receiving device existing on the local network by checking whether the receiving device exists on the local network.
【図１】本発明の実施の形態に係る送信装置が配置され
た、ネットワーク・システムの全体構成を示すブロック
図である。FIG. 1 is a block diagram showing an overall configuration of a network system in which a transmission device according to an embodiment of the present invention is arranged.
【図２】本発明の実施の形態に係る送信装置の具体的な
構成を示すブロック図である。FIG. 2 is a block diagram showing a specific configuration of a transmission device according to an embodiment of the present invention.
【図３】本発明の実施の形態に係る送信装置と受信装置
間の処理シーケンスチャートである。FIG. 3 is a processing sequence chart between the transmitting device and the receiving device according to the embodiment of the present invention.
【図４】本発明の実施の形態に係る送信装置と受信装置
間の処理シーケンスチャートである。FIG. 4 is a processing sequence chart between the transmitting device and the receiving device according to the embodiment of the present invention.
【図５】本発明の実施の形態に係る送信装置の送信方法
の処理手順を示すフローチャートである。FIG. 5 is a flowchart illustrating a processing procedure of a transmission method of the transmission device according to the embodiment of the present invention.
１０ 送信装置 １２ ローカル網 １４ ルータ １６ インターネット １８ 受信装置 ２０ 認証・鍵交換処理部 ２２ ローカル通信判断部 ２４ 送信部 ２６ ネットワークインターフェース DESCRIPTION OF SYMBOLS 10 Transmitting device 12 Local network 14 Router 16 Internet 18 Receiving device 20 Authentication / key exchange processing unit 22 Local communication determining unit 24 Transmitting unit 26 Network interface
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 5B017 AA03 BA05 BA07 CA16 5J104 AA07 AA12 AA16 EA04 EA15 KA02 PA07 5K030 GA15 HA08 HB21 HC14 JL09 JT04 LD20 5K033 AA08 BA01 BA15 CB01 DA01 DA13 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 5B017 AA03 BA05 BA07 CA16 5J104 AA07 AA12 AA16 EA04 EA15 KA02 PA07 5K030 GA15 HA08 HB21 HC14 JL09 JT04 LD20 5K033 AA08 BA01 BA15 CB01 DA01 DA13
Claims (10)
に接続され、暗号化されたデータを受信装置に送信する
送信装置であって、 該受信装置に暗号化データを送信する送信部と、 前記受信装置が前記ローカル網に接続されているか否か
を判断する判断部と、 前記ローカル網に接続されていると判断された場合の
み、前記受信装置との間で、認証・鍵交換を実行する認
証・鍵交換部とを有することを特徴とする送信装置。1. A transmitting device connected to a local network to which only a specific terminal can be connected and transmitting encrypted data to a receiving device, wherein the transmitting unit transmits encrypted data to the receiving device. A determination unit that determines whether or not the receiving device is connected to the local network; and executes authentication / key exchange with the receiving device only when it is determined that the receiving device is connected to the local network. A transmission device comprising: an authentication / key exchange unit that performs authentication.
前記ローカル網に接続されていないと判断した場合に
は、前記受信装置からの認証・鍵交換要求を拒絶する、
ことを特徴とする請求項１に記載の送信装置。2. The authentication / key exchange unit, when determining that the receiving device is not connected to the local network, rejects an authentication / key exchange request from the receiving device.
The transmitting device according to claim 1, wherein:
装置の両方が、前記ローカル網に割り当てられた同一の
アドレス上に存在するか否かを検知する手段、を備え
る、ことを特徴とする請求項１に記載の送信装置。3. The apparatus according to claim 2, wherein the determining unit includes means for detecting whether or not both the transmitting device and the receiving device are present on the same address assigned to the local network. The transmission device according to claim 1.
れたパケットのサブネットIDが前記送信装置のサブネッ
トIDと一致するか否かを照合する手段、を備える、こと
を特徴とする請求項３に記載の送信装置。4. The apparatus according to claim 3, wherein said detecting means includes means for checking whether a subnet ID of a packet transmitted from said receiving apparatus matches a subnet ID of said transmitting apparatus. The transmitting device according to claim 1.
るパケットのスコープフィールドを用いて、前記送信装
置および受信装置の両方が、同一のローカルスコープ内
に存在するか否かを検知する手段を備える、ことを特徴
とする請求項１に記載の送信装置。5. The means for detecting whether or not both the transmitting device and the receiving device are in the same local scope, using a scope field of a packet transmitted from the receiving device. The transmission device according to claim 1, comprising:
前記受信装置からの、前記送信装置に対するデータ送信
要求または認証・鍵交換要求を構成するパケットであ
る、ことを特徴とする請求項４または５に記載の送信装
置。6. The packet sent from the receiving device,
The transmission device according to claim 4, wherein the transmission device is a packet that constitutes a data transmission request or an authentication / key exchange request from the reception device to the transmission device.
に接続された送信装置から暗号化されたデータを受信装
置に送信する送信方法であって、 該受信装置からのデータ送信要求を受け取る工程と、 該データ送信要求に基づき、前記受信装置に暗号化デー
タを送信する工程と、 前記受信装置からの認証要求を受け取る工程と、 前記受信装置が前記ローカル網に接続されているか否か
を判断する工程と、 前記受信装置が前記ローカル網に接続されていると判断
された場合のみ、前記受信装置との間で、認証・鍵交換
を実行する工程とを含むことを特徴とする送信方法。7. A transmitting method for transmitting encrypted data to a receiving device from a transmitting device connected to a local network to which only a specific terminal can be connected, and receiving a data transmission request from the receiving device. Transmitting encrypted data to the receiving device based on the data transmission request; receiving an authentication request from the receiving device; and determining whether the receiving device is connected to the local network. And a step of performing authentication / key exchange with the receiving apparatus only when it is determined that the receiving apparatus is connected to the local network.
ローカル網に割り当てられたアドレス上に存在するか否
かを検知するステップ、を含む、ことを特徴とする請求
項７に記載の送信方法。8. The transmission according to claim 7, wherein the determining step includes a step of detecting whether or not the receiving device exists on an address assigned to the local network. Method.
装置と同一のローカルスコープ内に存在するか否かを検
知するステップ、を含む、ことを特徴とする請求項７に
記載の送信方法。9. The transmission method according to claim 7, wherein the determination step includes a step of detecting whether or not the receiving device exists in the same local scope as the transmitting device. .
前記ローカル網に接続されていないと判断された場合の
み、前記受信装置に認証不許可通知を送信する工程を、
さらに含む、ことを特徴とする請求項７に記載の送信方
法。10. A step of transmitting an authentication non-permission notice to the receiving apparatus only when it is determined that the receiving apparatus is not connected to the local network after the determining step.
The transmission method according to claim 7, further comprising:
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000094851A JP3749817B2 (en) | 2000-03-30 | 2000-03-30 | Transmitting apparatus and transmitting method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000094851A JP3749817B2 (en) | 2000-03-30 | 2000-03-30 | Transmitting apparatus and transmitting method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001285284A true JP2001285284A (en) | 2001-10-12 |
| JP3749817B2 JP3749817B2 (en) | 2006-03-01 |
Family
ID=18609826
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|---|---|---|---|
| JP2000094851A Expired - Lifetime JP3749817B2 (en) | 2000-03-30 | 2000-03-30 | Transmitting apparatus and transmitting method thereof |
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| Country | Link |
|---|---|
| JP (1) | JP3749817B2 (en) |
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