Information ciphering, deciphering method and apparatus and information ciphering and deciphering system

Abstract

The embodiment of the invention relates to an information encryption and decryption method, an information encryption and decryption device and an information encryption and decryption system. The information encryption method comprises the following steps: first characteristic information of at least one transport stream packet in a transport stream is extracted; the first characteristic information is encrypted; and the encrypted first characteristic information is embedded in a field alignment data packet of the transport stream packet. The embodiment of the invention realizes the protection of a legal TS stream, can effectively prevent the modification of the legal information transmitted on the broadcast television network, and the insertion and broadcast of the illegal and unauthorized information on the broadcast television network, and enhances the control of information transmitted on the broadcast television network.

Description

technical field [0001] The invention relates to the communication field, in particular to an information encryption and decryption method and device, and an information encryption and decryption system. Background technique [0002] In the information society, the role of computer communication network and radio and television network in politics, military, finance, commerce, transportation, telecommunications, culture and education is increasing day by day. Society is also increasingly dependent on computer networks and radio and television networks, especially the information infrastructure formed by the combination of computer technology, digital TV technology and communication technology has become the most important infrastructure reflecting the characteristics of the information society. As one of the main channels for people to obtain information, radio and television networks mainly rely on push to release various information to audiences. However, in the era of dig...

AI Technical Summary

Problems solved by technology

[0008] The encryption system and decryption system have complex structures, difficult operation and maintenance, and require high operating costs;

[0009] The encryption method is simple and easy to be broken, and once it is broken, it is difficult to upgrade the system and the cost is extremely high;

[0010] During the decryption process, once an illegal code stream is detected, the processing measures involved in the decryption method will cause huge processing costs to the user and the TV station

Images