JPEG image robust steganography method based on serial concatenated code and DCT coefficient relative relation

Abstract

The invention relates to the technical field of information hiding, and particularly relates to a JPEG image robust steganography method based on a serial concatenated code and DCT coefficient relative relation. The JPEG image robust steganography method based on the serial concatenated code and DCT coefficient relative relation comprises the following steps: determining a modification area; designing a corresponding distortion function; encoding a to-be-embedded message through error correction encoding; embedding the error correction encoding through robust steganography; performing JPEG compression; obtaining an information stream containing errors through steganographic decoding, and performing error correction through decoding of error correction encoding; and obtaining an original embedded message. The method provided by the invention can resist JPEG compression attacks of different quality factors in a larger range, and can guarantee that the embedded message can be completely extracted out with high probability, meanwhile, under the premise of bearing the same secret message, the method provided by the invention has higher detection resistance.

Description

technical field [0001] The invention relates to the technical field of information hiding, in particular to a JPEG image robust steganography method based on the relative relationship between serial concatenated codes and DCT coefficients. Background technique [0002] Steganography is a technique of constructing a covert communication channel using public carriers. In recent years, with the development of mobile communication technology, more and more digital carriers are sent and received by smart mobile terminals. However, due to the limitations of bandwidth, tariffs, and traffic, terminals often damage the carriers transmitted on such channels. Compression, so that classical steganography cannot correctly extract embedded messages in such cases. Therefore, it is of great practical value to study steganographic algorithms that can completely extract embedded messages in such channels and have stronger resistance to steganographic detection than robust watermarking algori...

AI Technical Summary

Problems solved by technology

However, when the algorithm is resistant to JPEG compression, when the quality factor of the JPEG compression attack is different from the quality factor of the carrier image, it is difficult to extract the secret message correctly. In this case, there is about 1% error in the extracted message, which leads to Some problems in practical applications, how to reduce the error rate, ensure that the message can be extracted correctly with a high probability, and at the same time improve its security, that is, the resistance to detection, is the problem that needs to be solved in robust steganography.

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