Method and system for transmitting peer-to-peer broadcast stream, data signature device and client

Abstract

The embodiment of the invention discloses a method and a system for transmitting a P2P broadcast stream, a digital signature device and a P2P client, relates to the technical field of communication, can prevent the P2P broadcast stream from being maliciously distorted in the transmitting process, and simultaneously avoids causing large impact on the performance of a P2P system. The method provided by the embodiment of the invention comprises the following steps: generating a public key and private key digital signature algorithm key pair; performing signature on a source broadcast stream according to a private key, fragmenting the signed source broadcast stream, and transmitting the fragmented source broadcast stream to the P2P client; and sending a public key to the P2P client, performing signature verification on the received P2P broadcast stream according to the public key with the P2P client. The method and the system are suitable for centralized P2P networking and CDN structure-based distributed P2P networking.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method, system, digital signature device and P2P client for point-to-point (P2P, Peer to Peer) live streaming delivery. Background technique [0002] According to different functions, data encryption technology can be divided into data transmission, data storage, data integrity authentication and key management technology. Generally, two encryption algorithms are used in network applications: symmetric key algorithm and asymmetric key algorithm. [0003] The so-called symmetric key algorithm means that the encryption key and the decryption key of an encryption algorithm are the same, or although they are not the same, the other can be easily derived from any one of them, that is, the key is shared by both parties. The so-called asymmetric key algorithm means that the encryption key and decryption key of an encryption algorithm are different, or that the other ke...

AI Technical Summary

Problems solved by technology

[0010] Since the P2P live stream is a real-time service, the P2P server needs to generate the verification code of the P2P live stream slice in real time and provide it to the user. If all users go to the server to obtain the verification code in real time, it will have a great impact on the system performance. ; If the node transmits the verification code, because MD5 uses a symmetric key, the parent node can regenerate the verification code after tampering with the content of the live stream slice, so as to provide different content for the child node, which does not achieve content protection. purpose of tampering

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