CN110365629A - A method and system for safe storage of real-time monitoring video data - Google Patents

Abstract

The invention relates to a method and system for the safe storage of real-time monitoring video data. First, the data buffered on the video collection terminal is collected regularly, and then the data is divided into blocks, MD5 encoded, hash checked, and encrypted, and then uploaded to the cloud. Server, create a database on the cloud server according to the IP of the video capture terminal and store the data in the form of "time + hash value" and "hash value + data block". The designed client allows users to quickly Locate and download the data to the local, after decrypting the downloaded data to form a file, the user can quickly play it back. The invention improves the utilization rate of the storage space of the video collection terminal by regularly collecting data; ensures that the same video data will only be stored once on the cloud server by means of secondary verification; and ensures the security of the video data by means of data encryption and decryption ;Storing in the form of "time + hash value" and "hash value + time" improves retrieval efficiency.

Description

A method and system for safe storage of real-time monitoring video data

technical field

The invention relates to the field of safe storage of monitoring video, in particular to a method and system for safe storage of real-time monitoring video data.

Background technique

Technological innovation has promoted the development of society, people's living standards have been continuously improved, and people have paid more and more attention to the use of high technology to protect their lives and property, thus promoting the development of the surveillance industry. In the field of video surveillance, from the perspective of development, the high-definition video data generated by countless terminals at any time is increasing by TB or even larger, and people have higher and higher requirements for the quality of surveillance video; from the perspective of use, surveillance data It is generally used for post-mortem verification, so it requires a long storage time, which directly leads to an increase in storage costs; in addition, the problems of poor data retrieval performance and slow video playback in the current system have attracted more and more attention, so this will promote Surveillance field has developed unprecedentedly. While analyzing the problems solved by the current monitoring system, summarize other problems that may exist but have not been paid attention to by researchers. For example, if the network is congested or disconnected, the current monitoring system may cause data upload failure, and instead store data in Locally, when the network is restored and uploading, this approach is feasible to a certain extent, but if the network cannot be restored quickly, due to the limited local storage space set, it will not be able to maintain data storage for a long time, and data loss occurs. Most of the video data of surveillance systems are stored in plaintext information. The development of technology brings convenience to people and creates tools for malicious people. The storage of data in plaintext creates opportunities for them. Therefore, the current surveillance data has serious security risks. Hidden dangers, if data leakage will increase the probability of user privacy exposure, and many other problems need to be solved urgently.

The current video surveillance systems (centralized storage and distributed cloud storage, etc.) are suitable for large-scale monitoring sites, but not suitable for small and medium-sized sites, and most of them are for processing video data streams.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to propose a method and system for the safe storage of real-time monitoring video data, which can not only improve the utilization rate of storage space, but also indirectly protect the privacy of users while ensuring data security, and also facilitate quick and easy after-the-fact. Verify.

The present invention adopts the following scheme to realize: a method for real-time monitoring video data safe storage, including a data acquisition and processing stage, a data verification storage stage and a data download and playback stage;

Wherein, the data acquisition and processing stage includes the following steps:

Step S1: regularly collect data buffered on the video capture terminal;

Step S2: match the data collected in step S1 with a suitable block size according to its size, so as to divide the data into blocks to obtain data blocks;

Step S3: MD5 encoding is performed on the data block obtained in step S2 to obtain a hash value;

Step S4: verify the hash value obtained in step S3 in the hash library, if the current hash value does not exist in the original hash library, insert the hash value into the hash library;

Step S5: use the hash value obtained in step S3 as a key to perform AES encryption on the data block in step S2 to obtain a ciphertext block;

Step S6: upload the hash value and its corresponding ciphertext block to the cloud server;

Wherein, the data verification storage stage includes the following steps:

Step S7: the cloud server receives and caches the data uploaded by the video capture terminal in step S6;

Step S8: the cloud server obtains the current time and stores it in the form of time, hash value, hash value and ciphertext block;

Wherein, the data download and playback stage includes the following steps:

Step S9: after the user logs in, the data is retrieved and downloaded from the cloud server according to the IP and the start and end time;

Step S10: decrypt the data downloaded in step S9 and write into a file;

Step S11: Obtain the data decrypted in Step S10 by means of local query, and perform video playback on the client.

Further, in step S1, the timing collection is that the user specifies the collection time according to the duration of the video file actually generated by the video collection terminal; the video collection terminal includes a video terminal camera, a web camera, or a local server.

Further, the data block in step S2 is to select an appropriate data block size to block the data according to the size of the collected video data itself, wherein the block size includes 8M, 16M, or 32M.

Further, the encryption in step S5 and the decryption in step S10 both use a symmetric encryption method, the algorithm includes AES or DES, and the key is a hash value.

Further, step S8 is specifically: first obtain the current time, then store the time and the hash value as the first pair of <key, value>, and store the hash value and the ciphertext block as the second pair of <key, value>.

Further, in step S9, the retrieving and downloading specifically includes: retrieving the video data of the specified video capture terminal within the specified time period on the cloud server by selecting the start and end time and IP, and downloading to the client.

The present invention also provides a system for the above-mentioned method for real-time monitoring of video data safe storage, including a video capture terminal, a cloud server, and a client; the video capture terminal performs video data capture, processing and uploading; The cloud server performs video data storage; the client performs data retrieval and download and video playback; the video capture terminal, the cloud server, and the client can cooperate to execute the above method.

The present invention aims at the video data cached locally, collects them regularly and then undergoes a series of processing, and finally caches and processes the local video with the least space, so as to relieve the pressure of the local space, and at the same time, it can avoid the occurrence of data due to the large local pressure caused by network congestion. Missing question. A verification is performed locally for the video storage, and a second verification is performed on the cloud server to ensure that the same video will only be stored once, and the recursive method of "time + hash value" and "hash value + data block" Video data is stored to solve the retrieval problem to a certain extent. For security issues, the data encryption method is used to ensure the security of video data to a certain extent. The user-friendly query interface will give users the best experience, and the finalized system will bring great convenience to users in small and medium-sized places to make up for the shortcomings of the current system.

Compared with the prior art, the present invention has the following beneficial effects: the present invention can not only solve the problems of low utilization rate of storage space and insecure data, but also can quickly retrieve and download monitoring videos to facilitate quick verification afterwards, and achieve fast and safe storage. The design goal is suitable for large-scale promotion and use, and can be applied to the actual production and life process.

Description of drawings

FIG. 1 is a schematic diagram of a method according to an embodiment of the present invention.

Detailed ways

The present invention will be further described below with reference to the accompanying drawings and embodiments.

As shown in FIG. 1 , the present embodiment provides a method for real-time monitoring of video data safe storage, including a data acquisition and processing stage, a data verification storage stage, and a data download and playback stage;

Wherein, the data acquisition and processing stage includes the following steps:

Step S1: regularly collect data buffered on the video capture terminal;

Step S2: match the data collected in step S1 with a suitable block size according to its size, so as to divide the data into blocks to obtain data blocks;

Step S3: MD5 encoding is performed on the data block obtained in step S2 to obtain a hash value;

Step S4: verify the hash value obtained in step S3 in the hash library, if the current hash value does not exist in the original hash library, insert the hash value into the hash library;

Step S5: use the hash value obtained in step S3 as a key to perform AES encryption on the data block in step S2 to obtain a ciphertext block;

Step S6: upload the hash value and its corresponding ciphertext block to the cloud server;

Wherein, the data verification storage stage includes the following steps:

Step S7: the cloud server receives and caches the data uploaded by the video capture terminal in step S6;

Step S8: the cloud server obtains the current time and stores it in the form of time, hash value, hash value and ciphertext block;

Wherein, the data download and playback stage includes the following steps:

Step S9: after the user logs in, the data is retrieved and downloaded from the cloud server according to the IP and the start and end time;

Step S10: decrypt the data downloaded in step S9 and write into a file;

Step S11: Obtain the data decrypted in Step S10 by means of local query, and perform video playback on the client.

In this embodiment, in step S1, the timing collection is that the user specifies the collection time according to the duration of the video file actually generated by the video collection terminal; the video collection terminal includes a video terminal camera, a web camera, or a local server.

In this embodiment, the data block in step S2 is to select an appropriate data block size to block the data according to the size of the collected video data itself, wherein the block size includes 8M, 16M, or 32M.

In this embodiment, the encryption in step S5 and the decryption in step S10 both use a symmetric encryption method, the algorithm includes AES or DES, and the key is a hash value.

In this embodiment, step S8 is specifically as follows: first obtain the current time, then store the time and the hash value as the first pair of <key, value>, and use the hash value and the ciphertext block as the second pair of <key, value> to store.

In this embodiment, in step S9, the retrieval and download is specifically: by selecting the start and end time and IP, retrieving the video data of the designated video capture terminal in the designated time period on the cloud server and downloading to the client.

This embodiment also provides a system for the above-mentioned method for securely storing real-time monitoring video data, including a video capture terminal, a cloud server, and a client; the video capture terminal performs video data capture, processing, and uploading; The cloud server performs video data storage; the client performs data retrieval and download and video playback; the video capture terminal, the cloud server, and the client can cooperate to execute the above method.

Preferably, this embodiment specifically summarizes the functional modules of the real-time monitoring video data security storage system according to the program functions, specifically:

Acquisition terminal: data acquisition module, data processing module, data upload module;

Cloud server side: data receiving verification module, data storage module;

Client: user login module, data retrieval and download module, data decryption module and data playback module;

The data collection module is used to periodically collect the directory of the video cached by the designated monitoring terminal, and the user sets the collection duration according to the period of the actual terminal generating the video;

The data processing module is used to process the data collected by the collection module, specifically: the data division is to select an appropriate data block size according to the size of the collected data to perform division into blocks to obtain data blocks; MD5 encoding is to perform MD5 encoding on the previous data block to obtain the hash value; the first verification is to verify the hash value in the local hash library, and if it does not exist, insert the hash value to expand the hash library; the The data encryption is to encrypt the data block, and use the hash value as the encryption key to encrypt the data block through the encryption algorithm to obtain the ciphertext block;

The data uploading module is used to upload the hash value and the ciphertext block obtained by the processing module to the cloud server;

The data receiving and verifying module is used to receive and verify the data uploaded by the video capture terminal, so as to carry out the next step;

The data storage module is used to store the hash value and the ciphertext block;

The user login module is used to verify whether user information exists;

The data retrieval and download module is used for the user to retrieve and download data, which is convenient for subsequent verification. Specifically: the user can retrieve and download the data in the specified time period in the specified database according to the IP (database name) and the specific start and end time;

The data decryption module is used for decrypting the downloaded video data to obtain original data.

The data playback module can query the folder where the video data is stored locally, and can obtain the downloaded monitoring data, and then play it on the client-side playing interface;

In this embodiment, each step of operations is performed between the collection end and the cloud server, and between the client and the cloud server through message instructions.

To sum up, this example combines the technologies of timed acquisition and cache video, secondary verification, encryption and decryption technology, and new storage methods of "time + hash value" and "hash value + data block" to provide a real-time monitoring system. The method and system for safe storage of video data can not only improve the utilization rate of storage space, but also ensure the safety of monitoring video data, and at the same time can quickly verify after the event. Directory of video data; after the data is collected, select the appropriate block size according to the size of the data itself to divide the data into blocks to obtain data blocks; perform MD5 encoding on the data blocks to obtain the information summary (the hash value will be checked for the first time at the collection end , and as the encryption and decryption key); check the hash value in the hash library, if it does not exist, insert the hash value into the hash library; use the hash value to encrypt the corresponding data block to obtain the ciphertext block; The value and the ciphertext block are uploaded to the cloud server for storage; the cloud server verifies the uploaded hash value for the second time, and if it does not exist, it returns a message to the collection terminal to allow uploading of the ciphertext block; after the cloud server obtains the ciphertext block, it first Obtain the current time, and then store the "time and hash value", "hash value and ciphertext block" successively; the user logs in to the system using the client, retrieves and downloads the specified monitoring terminal according to the IP (database name) and start and end time. The surveillance video data generated in the time period is decrypted and played back on the playback interface. The utilization rate of storage space is improved through timing collection and secondary verification, and data security is ensured to a certain extent through data encryption and decryption, while the privacy of users is protected. The "data block" storage method improves retrieval efficiency and facilitates quick verification afterwards.

The above descriptions are only preferred embodiments of the present invention, and all equivalent changes and modifications made according to the scope of the patent application of the present invention shall fall within the scope of the present invention.

Claims (7)

1. a kind of method for monitoring video data secure storage in real time, it is characterised in that: including data acquisition process stage, data It verifies memory phase and data downloads playback phase；

Wherein, the data acquisition process stage the following steps are included:

Step S1: timing acquiring is buffered in the data in video acquisition terminal；

Step S2: suitable block size is matched according to its size to the collected data of step S1 and is obtained to carry out deblocking To data block；

Step S3: MD5 coding is carried out to the data block that step S2 is obtained, obtains hash value；

Step S4: the hash value that step S3 is obtained is verified in the library hash, if there is no original for current hash value In the library hash, then the hash value is inserted into the library hash；

Step S5: the hash value for using step S3 to obtain carries out AES encryption as key, to the data block of step S2, obtains close Literary block；

Step S6: hash value and corresponding ciphertext blocks are uploaded into cloud server；

Wherein, the data check memory phase the following steps are included:

Step S7: in the cloud server receiving step S6 video acquisition terminal upload data and cached；

Step S8: cloud server obtains current time, is deposited in a manner of time and hash value, hash value and ciphertext blocks Storage；

Wherein, data downloading playback phase the following steps are included:

Step S9: after user logs in, according to retrieval and downloading data on IP and beginning and ending time beyond the clouds server；

Step S10: the data of step S9 downloading are decrypted and file is written；

Step S11: by way of local search, obtaining step S10 decryption after data, client carry out video playback.

2. a kind of method for monitoring video data secure storage in real time according to claim 1, it is characterised in that: step S1 In, the timing acquiring is the finger that user is acquired the time according to the duration of the practical video file generated of video acquisition terminal It is fixed；The video acquisition terminal includes video terminal camera, IP Camera or local server.

3. a kind of method for monitoring video data secure storage in real time according to claim 1, it is characterised in that: step S2 Described in deblocking be to select suitable data block size to carry out data according to the size of collected video data itself Piecemeal, wherein block size includes 8M, 16M or 32M.

4. a kind of method for monitoring video data secure storage in real time according to claim 1, it is characterised in that: step S5 In encryption and the decryption in step S10 be all made of symmetric cryptography mode, algorithm includes AES or DES, and key is hash value.

5. a kind of method for monitoring video data secure storage in real time according to claim 1, it is characterised in that: step S8 Specifically: then acquisition current time first stores<key, value>using time and hash value as first, will Hash value and ciphertext blocks store<key, value>as second.

6. a kind of method for monitoring video data secure storage in real time according to claim 1, it is characterised in that: step S9 In, the retrieval is simultaneously downloaded specifically: eventually by retrieval designated acquisition on selection beginning and ending time and IP beyond the clouds server It holds the video data at the appointed time section and downloads to client.

7. a kind of system of the method based on real time monitoring video data secure storage as claimed in any one of claims 1 to 6, It is characterized in that: including video acquisition terminal, cloud server and client；The video acquisition terminal carries out video data Acquisition, processing and upload；The cloud server carries out video data storage；The client carries out data retrieval downloading and view Frequency plays back；The video acquisition terminal, cloud server and client can cooperate perform claim requirement 1 to claim 6 Any one method.