Method for hiding information and method for obtaining information

Abstract

The application relates to a method for hiding information and a method for obtaining information. The method for hiding the information comprises the following steps: obtaining a bit sequence at a predetermined position of a source bit-stream of public information, and initializing a complex Gauss random sequence generator by means of the bit sequence to generate a complex Gauss random sequence;performing spread spectrum modulation on secret information according to the complex Gauss random sequence to obtain a Gauss spread spectrum signal; and superimposing the Gauss spread spectrum signalon a conventional spread spectrum signal of public information to obtain a mixed signal. By means of the method for hiding the information, through pseudo-gaussianizing the communication signal of thesecret information, the mixed signal embedded in the secret information tends to be the same as the signal sent without embedding the secret information in terms of time-domain characteristic components, frequency-domain characteristic components or demodulation results; therefore, the information receiving end can recover the secret information and the public information normally, the imperceptibility of the secret information is improved, and the concealment of covert communication process is improved.

Description

technical field [0001] The present application relates to the technical field of information hiding, in particular to an information hiding method and an information obtaining method. Background technique [0002] Information hiding is to secretly hide the confidential information in the public information, and then transmit the confidential information through the transmission of the public information on the open channel to ensure the imperceptibility of the secret communication. [0003] At present, the traditional information hiding technology is mostly concentrated on text, image, audio and video and other carriers, that is to say, by embedding secret information into the original public information such as text, image, audio and video, and sending it to the target information However, since the embedding of secret information often leads to garbled data in public information, the detection party can often judge the existence of hidden information based on the character...

AI Technical Summary

Problems solved by technology

[0003] At present, the traditional information hiding technology is mostly concentrated on text, image, audio and video and other carriers, that is to say, by embedding secret information into the original public information such as text, image, audio and video, and sending it to the target information However, since the embedding of secret information often leads to garbled data in public information, the detection party can often judge the existence of hidden information based on the characteristics of garbled data, which leads to a great decrease in the concealment of secret information. Even if the embedding of secret information It does not lead to data garbled characters in public information, and the detection party can still judge the existence of secret information through reverse derivation or analysis of the remaining information after removing the public information. The traditional information hiding technology has low concealment

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