Optimal coupling image steganography method based on packet replacement

Abstract

The invention relates to an optimal coupling image steganography method based on packet replacement. The method comprises steps that, secret information is converted into binary bit rates which are divided at 8 bits into sets to form N sets of binary bit streams, each set of binary bit streams has 28 types of combination schemes; according to each combination scheme of each set of binary bit streams, and bit position reversion processing for each combination scheme is carried out to generate 28 sets of counter-rotating binary bit streams; the 28 sets of counter-rotating binary bit streams are embedded into a carrier image through a least histogram distortion method to acquire a secret carrying image; through calculation and determination, when a coupling value of the secret carrying image and the carrier image reaches a preset optimal coupling value, relevant parameters are taken as an encryption key, the secret carrying image reaching the optimal coupling value is selected to enter channel transmission, otherwise, each combination scheme of other N-1 sets of binary bit streams is calculated till the secret carrying image having the optimal coupling value appears; secret information in the secret carrying image is extracted by a receiver by utilizing a decryption key corresponding to the encryption key.

Description

technical field [0001] The invention relates to the field of image steganography, in particular to an optimal matching image steganography method based on group permutation. Background technique [0002] Information encryption and information hiding are two core technical modes in the field of information security. Information encryption is a security technology that uses mathematical or physical means to encrypt the transmitted plaintext information to ensure the unrecognizability of the information. Only the recipient with the correct key can decrypt the plaintext information. However, with the continuous improvement of computer performance, it is possible to use the brute force method to decipher the encryption algorithm. In addition, even if the attacker fails to crack the key, he can destroy the detected ciphertext so that the recipient cannot obtain the correct secret information. It can be seen that the traditional information encryption technology fails to play a go...

AI Technical Summary

Problems solved by technology

However, with the continuous improvement of computer performance, it is possible to use the exhaustive method to decipher the encryption algorithm. In addition, even if the attacker fails to crack the key, he can destroy the detected ciphertext so that the recipient cannot obtain the correct secret information.

It can be seen that the traditional information encryption technology fails to play the function of information security transmission well, so a more effective information transmission technology is needed to provide protection.

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