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Multi-media information security guarantee method combining encryption and watermark

A technology for multimedia information and security assurance, applied in secure communication devices, voice analysis, instruments, etc., can solve the problems of inability to guarantee information security transmission, tracking, and failure, and achieve the effect of convenient copyright tracking and protection of security

Inactive Publication Date: 2010-02-10
SUN YAT SEN UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Encryption ensures the safe transmission of confidential information in the channel, but once it is decrypted, the infringer can copy and tamper with the information arbitrarily, and it cannot be tracked; while watermarking technology can identify the ownership of the work and track the source of illegal infringement, but there is no guarantee Secure Transmission of Information

Method used

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  • Multi-media information security guarantee method combining encryption and watermark
  • Multi-media information security guarantee method combining encryption and watermark
  • Multi-media information security guarantee method combining encryption and watermark

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings.

[0038] Flow process of the present invention is attached figure 1 As shown, including partial encryption of multimedia information at the sending end, after receiving the encrypted multimedia file at the receiving end, it can decrypt and embed watermark, or directly embed watermark without decryption, and then play the decrypted multimedia file at the playback terminal File (if the watermark is directly embedded without decryption, the decryption operation is required before playing the multimedia file), if the copyright ownership needs to be determined, it can be realized by extracting the watermark operation.

[0039] Among them, the specific operations for encryption / decryption and watermark embedding and extraction are detailed as follows:

[0040] 1. Encryption and decryption:

[0041] Generate a random encryption sequence en(i) according to the set key key1, an...

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Abstract

The invention provides a multi-media information security guarantee method combining encryption and watermark. The security guarantee method is realized through the joint efforts of a sending terminal and a receiving terminal of the multi-media information. Through carrying out data encryption on the multi-media information at the sending terminal and transmitting the encrypted multi-media information to the receiving terminal, the watermark information is directly embedded into the receiving terminal or is embedded after deciphering at the receiving terminal. The schemes of time domain encryption and histogram watermark embedding adopted by the invention ensure that the work domains of encryption and watermark are totally different and exert no influence on each other. The multi-media information security guarantee method combining encryption and watermark not only effectively safeguards the security of the multi-media information, but also confirms the copyright tracking of the multi-media information conveniently, thus being favorable for separated operations.

Description

technical field [0001] The invention belongs to the field of multimedia information security, in particular to a multimedia information security guarantee method combining encryption and watermarking. technical background [0002] With the wide application of computer and network technology, digital multimedia information is widely used and can be transmitted conveniently and quickly. The copyright protection of digital media and the prevention of data leakage have become a hot spot of social concern. For the audio transmitted over the network, people urgently need its authenticity and confidentiality, so digital watermarking technology and audio encryption technology are proposed. Digital watermarking technology verifies the ownership and integrity of data through information hiding and camouflage; audio encryption technology hides the real information of the audio itself based on modern cryptography. [0003] Encryption and watermarking are two important technologies for...

Claims

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Application Information

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IPC IPC(8): H04L29/06G10L19/00H04L9/00
Inventor 周东敏黄继武
Owner SUN YAT SEN UNIV
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