Encryption method and system for streaming video

Abstract

The invention discloses a streaming video-oriented encryption method and system. The streaming video-oriented encryption method comprises the following steps: acquiring a streaming video to be encrypted; the method comprises the following steps: dividing a streaming transmission video to be encrypted into a plurality of blocks according to a set byte number; generating a block key for each block; based on the block key, generating a corresponding key character for each byte to be encrypted of the streaming transmission video to be encrypted; generating a random factor for each byte to be encrypted of the streaming transmission video to be encrypted; based on the key character and the random factor of each to-be-encrypted byte, obtaining a final key corresponding to the to-be-encrypted byte; performing encryption processing on the corresponding bytes of the streaming transmission video to be encrypted by adopting the final key corresponding to each byte to be encrypted; and encrypting all bytes to be encrypted in the streaming transmission video. Various video formats are compatible, and the video can be quickly encrypted and decrypted when being dragged at any position; ciphertexts generated for different data have strong randomness, and rules are not easy to collide.

Description

technical field [0001] The invention relates to the technical field of video encryption, in particular to an encryption method and system for streaming video. Background technique [0002] The statements in this section merely mention the background technology related to the present invention and do not necessarily constitute the prior art. [0003] With the development of Internet technology, the application and dissemination of video files are becoming more and more extensive. Especially with the increase in bandwidth, more video files do not want to wait until the download is complete to play, but need to be watched online, hoping to be able to smoothly drag to any position to play. At the same time, content creators urgently need video encryption methods that are efficient, safe, and compatible with multiple video formats, which can be used in real-time streaming scenarios. [0004] There are several types of encryption technologies for existing video files: [0005] ...

AI Technical Summary

Problems solved by technology

[0005] 1. By transforming the video frame, this type of technology relies on the analysis and processing of the video coding structure, the encryption time is long, the real-time performance is poor, and the compatibility of the video format is also very limited

[0006] 2. Based on conventional encryption algorithms such as AES, most of them need to encrypt from the starting position of the file, and it is not easy to support direct encryption of data at any position, so that it cannot support video streaming and dragging at any position; and this type of method The encryption speed is slow and the amount of data increases after encryption, which is not suitable for the encryption of massive video data

In the XOR operation, if the key rule is simple or even a key is fixed, the attacker can easily find the law of the ciphertext data through the input of a large amount of data, and the security is not enough; there are also complex key rules, such as the ChaCha20 algorithm, for Keep the XOR keys used for each byte encryption different, and a new set of keys will be recalculated when each set of keys is used up. During the encryption process of a 64GB video file, more than 1 billion key changes are required operation, low efficiency; especially since the calculation of the new key depends on the results of the previous set of keys, if the player directly drags to a certain position at the end to play, it must first perform hundreds of millions of key transformations to get the position The correct key of the data will consume a lot of calculations at this time, which will cause freezes during dragging and playing, and is not suitable for dragging and playing videos.

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