Method for encrypting and decrypting audio and video data to be transmitted

Abstract

The invention discloses a method for encrypting and decrypting audio and video data to be transmitted. In the process of encapsulating the audio and video data to be transmitted into a transport stream (TS), all or part of the audio and video data at different stages and related information is encrypted for multiple times, and then the finally encrypted TS is transmitted; and correspondingly, when an opposite terminal receives the encrypted TS, all or part of the encrypted TS is decrypted at different stages for multiple times. Therefore, the impact on the security, of the audio and video data to be transmitted, of a set of encryption algorithms can be avoided, and the cost cannot be increased.

Description

technical field [0001] The invention relates to a transmission audio and video processing technology, in particular to a method for encrypting and decrypting transmitted audio and video data. Background technique [0002] As a resource, audio and video information plays a pivotal role in today's rapid development of networking and informationization. With the rapid popularization of computer networks, the rapid improvement of network performance, and the surge of cloud computing and big data, high-definition network With its good technology and cost advantages, audio and video surveillance is showing a vigorous development trend in safe cities, smart cities, intelligent transportation, and even enterprises, homes or stores. Various network audio and video surveillance equipment are springing up like mushrooms Emerging in endlessly, the construction of network audio and video surveillance system is also in full swing. With the advancement of technology, network security inci...

AI Technical Summary

Problems solved by technology

For encryption, the central encryption server of the audio and video transmission system or the system purchases additional hardware encryption, which improves the security but also increases the cost and deployment complexity, and there is no encryption at the source, which has potential security risks.

[0004] Specifically, the audio and video transmission system mainly adopts two methods when encrypting and decrypting the transmitted audio and video: the first method: encrypt the transmitted audio and video with a fixed key or use a local random key, Pass the encrypted audio and video to the peer through the cloud audio and video monitoring system, and the peer uses the solidified key or the local random key received or obtained in advance according to the rules to decrypt, but this method has security risks; The second method is to set up a dedicated server or encryption device in the audio and video transmission system. The cost is high and the performance of pure software is insufficient, which is not enough to be used under the embedded chip with low frequency.

[0005] In summary, the audio and video transmission system only applies some existing encryption and decryption algorithms, and the security performance depends on the superiority of the encryption algorithm, without fully considering the characteristics of audio and video and the transmission environment

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