CN114390153B - Lossless transmission, hiding and reading method of secret information and computer system - Google Patents
Lossless transmission, hiding and reading method of secret information and computer system Download PDFInfo
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- CN114390153B CN114390153B CN202111456555.3A CN202111456555A CN114390153B CN 114390153 B CN114390153 B CN 114390153B CN 202111456555 A CN202111456555 A CN 202111456555A CN 114390153 B CN114390153 B CN 114390153B
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- H04N1/00—Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
- H04N1/32—Circuits or arrangements for control or supervision between transmitter and receiver or between image input and image output device, e.g. between a still-image camera and its memory or between a still-image camera and a printer device
- H04N1/32101—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title
- H04N1/32144—Display, printing, storage or transmission of additional information, e.g. ID code, date and time or title embedded in the image data, i.e. enclosed or integrated in the image, e.g. watermark, super-imposed logo or stamp
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Abstract
The invention discloses a lossless transmission, hiding and reading method of secret information and a computer system, wherein a sending end synthesizes binary original secret information into a synthesized image of hidden secret information, and lossy binary secret information is extracted from the synthesized image according to a first rule; performing exclusive OR operation on the lossy binary secret information and binary original secret information to obtain binary residual information, and transmitting the binary residual information and the synthesized image to a receiving end; after receiving, the receiving end converts the synthesized image into lossy binary secret information according to a first rule, and compares and combines the lossy binary secret information with binary residual information to obtain binary original secret information. The lossy binary secret information and the received binary residual information are compared and combined to obtain binary original secret information, so that lossless transmission of the secret information is realized, the binary residual information is encrypted before lossless transmission of the secret information, and the security of lossless transmission of the secret information is improved.
Description
Technical Field
The present invention relates to the field of information hiding technologies, and in particular, to a method for lossless transmission, hiding and reading of secret information, and a computer system.
Background
Steganography is a technique for hiding secret information in public digital media, which can be pictures, video, audio, etc. Conventional image steganography techniques typically find a carrier picture and embed secret information into the carrier picture by slightly modifying the carrier picture. Such methods, because of modifying the characteristics of the image itself, leave easily noticeable marks on the image that are easily detected by steganographic analysis techniques.
To solve this problem, a "no carrier" steganography method is proposed. The "no carrier" is not to directly modify the content of the carrier, so that the effect of the steganalysis technology for judging whether the image has hidden information or not based on the analysis of the image characteristics is greatly reduced. At present, the 'no carrier' steganography is mainly divided into two types: a method based on image composition and a method based on secret information mapping. The two methods solve the problem that the traditional image steganography is easy to be detected by steganalysis algorithm due to the fact that the statistical information of the image is modified, but have certain defects. In the carrier-free steganography method based on secret information mapping, binary secret information is generally transmitted, and although lossless transmission of the secret information can be realized, as each secret information needs to be hidden by a corresponding image, the number of the needed corresponding images is exponentially increased when the secret information is increased by one bit; if the long secret information is segmented, a problem that many pictures are needed for each group of secret information transmission exists, and the behaviors can be unsafe and suspected; in the "carrier-free" steganography method based on image synthesis, since an image carrying secret information is artificially generated, the image may have an unreal problem; moreover, since the hiding and extracting of secret information generally uses a pre-trained deep learning model, there may be some error in extracting secret information.
Therefore, how to develop a method for lossless transmission of secret information is a problem to be solved by those skilled in the art.
Disclosure of Invention
The invention provides a lossless transmission, hiding and reading method of secret information and a computer system, which are used for solving the technical problem that the secret information has error rate when the secret information is extracted by using an information hiding method in the prior art.
In order to solve the technical problems, the technical scheme provided by the invention is as follows:
a lossless transmission of secret information, comprising:
the sending end synthesizes the binary original secret information into a synthesized image of hidden secret information, and extracts lossy binary secret information from the synthesized image according to a first rule; performing exclusive OR operation on the lossy binary secret information and the binary original secret information to obtain binary residual information, and transmitting the binary residual information and the synthesized image to a receiving end;
the receiving end receives the binary residual information and the synthesized image; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information.
Preferably, before the sending end sends the binary residual information and the composite image to the receiving end, the sending end maps the binary residual information into a mapped image containing the binary residual information, and then sends the mapped image and the composite image to the receiving end together.
After receiving the mapping image containing the binary residual information, the receiving end maps the mapping image into the binary residual information.
Preferably, the transmitting end performs lossless compression on the binary residual information before mapping the binary residual information into a mapping image containing the binary residual information; mapping the lossless compressed binary residual information into a mapping image containing the lossless compressed binary residual information, and sending the mapping image and the synthesized image to a receiving end;
after receiving a mapping image containing lossless compressed binary residual information, the receiving end firstly maps the mapping image into lossless compressed binary residual information, and then performs decompression operation corresponding to lossless compression to obtain the binary residual information.
The embodiment of the invention also provides a method for hiding the secret information, which synthesizes the binary original secret information into a synthesized image for hiding the secret information, and extracts the lossy binary secret information from the synthesized image according to a first rule; the lossy binary secret information and the binary original secret information are subjected to exclusive OR operation to obtain binary residual information, and the binary residual information and the synthesized image are transmitted together as encrypted secret information.
Preferably, before the binary residual information is transmitted together with the composite image as the encrypted secret information, the binary residual information is mapped into a mapped image containing the binary residual information, and then transmitted together with the composite image as the encrypted secret information.
Preferably, before mapping the binary residual information into a mapped image containing residual information, lossless compression is further performed on the binary residual information; and mapping the lossless compressed binary residual information into a mapping image containing the lossless compressed binary residual information, and transmitting the mapping image and the synthesized image together as encrypted secret information.
The embodiment of the invention also provides a method for reading the secret information, which is used for acquiring the binary residual information and the synthesized image; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information.
Preferably, when the acquired binary residual information is a mapping image containing binary residual information, the mapping image is mapped to binary residual information.
Preferably, when the obtained mapping image containing the binary residual information is a mapping image containing the lossless compressed binary residual information, mapping the mapping image containing the lossless compressed binary residual information into the lossless compressed binary residual information, and then performing decompression operation of lossless compression to obtain the binary residual information.
Embodiments of the present invention also provide a computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of any of the methods described above when executing the computer program.
The invention has the following beneficial effects:
the sending end synthesizes the binary original secret information into a synthesized image of hidden secret information, and extracts lossy binary secret information from the synthesized image according to a first rule; performing exclusive OR operation on the lossy binary secret information and the binary original secret information to obtain binary residual information, and transmitting the binary residual information and the synthesized image to a receiving end; the receiving end receives the binary residual information and the synthesized image; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information. The lossy binary secret information and the received binary residual information are compared and combined to obtain binary original secret information, so that lossless transmission of the secret information is realized, meanwhile, the binary residual information is encrypted before lossless transmission of the secret information, and the security of lossless transmission of the secret information is improved.
In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The invention will be described in further detail with reference to the accompanying drawings.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:
fig. 1 is a schematic diagram of a method for lossless transmission, hiding and reading of secret information and a computer system according to a preferred embodiment of the present invention.
Detailed Description
Embodiments of the invention are described in detail below with reference to the attached drawings, but the invention can be implemented in a number of different ways, which are defined and covered by the claims.
Example 1:
referring to fig. 1, a lossless information hiding method of the present invention includes:
the transmitting end synthesizes binary original secret information into a synthesized image of hidden secret information, the binary secret has 256 bits, lossy binary secret information is extracted from the synthesized image according to a first rule, and exclusive-or operation is carried out on the lossy binary secret information and the binary original secret information, so that binary residual information is obtained as follows: [00 00000 00000 00000 00000 00000 00000 00000 00000 00000 0001 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 000001 00001 00000 00000 000001 000001 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00 ];
where "0" indicates a bit where the pseudo binary secret information is correct with the binary original secret information, and "1" indicates a bit where the pseudo binary secret information is incorrect with the binary original secret information.
The first rule is a rule of an inverse operation of synthesizing binary original secret information into a synthesized image hiding the secret information.
Lossless compression is carried out on the binary residual information: acquiring the number and the positions of 1's in the binary residual information; the position coding is used, i.e. the binary number represents the position of "1" in the binary residual information, starting from binary number 0 representing the position of "1", for example, binary number 0 representing the 1 st bit of the binary residual information as "1", binary number 1 representing the 2 nd bit of the binary residual information as "1", each bit of the binary number representing "1" being identical and complementing the largest bit of the binary number up to the last bit position that can represent the binary residual information. In practice, the bits of each binary number representing a "1" are determined by the length of the binary residual information. And splicing binary numbers representing the position of each 1 back and forth to obtain lossless compressed binary residual information. In the implementation, the binary residual information has the characteristics of '0' and '1' with very little, so that the lossless compression method can ensure that the residual information can be decompressed and improve the compression ratio and the compression efficiency.
In the binary residual information, the number of 1's is 5, and the numbers are respectively 51, 167, 172, 188 and 194 bits;
so a "1" located at bit 51 of the binary residual information is denoted as "00110010";
"1" located at 167 th bit of the binary residual information is denoted as "10100110";
"1" located at 172 th bit of the binary residual information is denoted as "10101011";
"1" located at 188 th bit of the binary residual information is denoted as "10111011";
a "1" located at bit 194 of the binary residual information is denoted as "11000001".
The binary numbers representing the position of each 1 are spliced in sequence, and compressed binary residual information is obtained as follows: [0011001010100110101010111011101111000001].
And mapping the lossless compressed binary residual information into a mapping image containing the lossless compressed binary residual information, and sending the mapping image and the synthesized image to a receiving end.
After receiving a mapping image containing lossless compressed binary residual information, a receiving end firstly maps the mapping image into lossless compressed binary residual information, and then performs decompression operation corresponding to lossless compression to obtain binary residual information; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information.
Example 2:
referring to fig. 1, a method for hiding secret information includes: the transmitting end synthesizes binary original secret information into a synthesized image of hidden secret information, the binary original secret information has 256 bits, lossy binary secret information is extracted from the synthesized image according to a first rule, and exclusive-or operation is carried out on the lossy binary secret information and the binary original secret information to obtain binary residual information as follows: [00 00000 00000 00000 00000 00000 00000 00000 00000 00000 0001 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 000001 00001 00000 00000 000001 000001 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00000 00 ];
where "0" indicates a bit where the pseudo-binary secret information is correct to the binary original secret information, and "1" indicates a bit where the pseudo-binary secret information is incorrect to the binary original secret information.
The first rule is a rule of an inverse operation of synthesizing binary original secret information into a synthesized image hiding the secret information.
Lossless compression is carried out on the binary residual information: acquiring the number and the positions of 1's in the binary residual information; the position coding is used, i.e. the binary number represents the position of "1" in the binary residual information, starting from binary number 0 representing the position of "1", for example, binary number 0 representing the 1 st bit of the binary residual information as "1", binary number 1 representing the 2 nd bit of the binary residual information as "1", each bit of the binary number representing "1" being identical and complementing the largest bit of the binary number up to the last bit position that can represent the binary residual information. In practice, the bits of each binary number representing a "1" are determined by the length of the binary residual information. And splicing binary numbers representing the position of each 1 back and forth to obtain lossless compressed binary residual information. In the implementation, the binary residual information has the characteristics of '0' and '1' with very little, so that the lossless compression method can ensure that the residual information can be decompressed and improve the compression ratio and the compression efficiency.
In the binary residual information, the number of 1's is 5, and the numbers are respectively 51, 167, 172, 188 and 194 bits;
so a "1" located at bit 51 of the binary residual information is denoted as "00110010";
"1" located at 167 th bit of the binary residual information is denoted as "10100110";
"1" located at 172 th bit of the binary residual information is denoted as "10101011";
"1" located at 188 th bit of the binary residual information is denoted as "10111011";
a "1" located at bit 194 of the binary residual information is denoted as "11000001".
The binary numbers representing the position of each 1 are spliced in sequence, and compressed binary residual information is obtained as follows: [0011001010100110101010111011101111000001].
And mapping the lossless compressed binary residual information into a mapping image containing the lossless compressed binary residual information, and transmitting the mapping image and the synthesized image together as encrypted secret information.
Example 3:
referring to fig. 1, a method for reading secret information includes: after the binary residual information received by the receiving end is a mapping image and a synthesized image containing the lossless compressed binary residual information, mapping the mapping image into the lossless compressed binary residual information, and then performing decompression operation corresponding to the lossless compression to obtain the binary residual information; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information.
Example 4:
a computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of any of the methods described above when the computer program is executed.
According to the lossless transmission, hiding and reading method and the computer system of the secret information, a sending end synthesizes binary original secret information into a synthesized image of hidden secret information, and lossy binary secret information is extracted from the synthesized image according to a first rule; performing exclusive OR operation on the lossy binary secret information and the binary original secret information to obtain binary residual information, and transmitting the binary residual information and the synthesized image to a receiving end; the receiving end receives the binary residual information and the synthesized image; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information. The lossy binary secret information and the received binary residual information are compared and combined to obtain binary original secret information, so that lossless transmission of the secret information is realized, meanwhile, the binary residual information is encrypted before lossless transmission of the secret information, and the security of lossless transmission of the secret information is improved. Therefore, the invention realizes lossless transmission of secret information and has higher confidentiality.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A lossless transmission method of secret information, comprising:
the method comprises the steps that a sending end synthesizes binary original secret information into a synthesized image of hidden secret information, and lossy binary secret information is extracted from the synthesized image according to a first rule; performing exclusive-or operation on the lossy binary secret information and the binary original secret information to obtain binary residual information, and transmitting the binary residual information and the synthesized image to a receiving end;
the receiving end receives the binary residual information and the synthesized image; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information.
2. The lossless transmission method of secret information according to claim 1, wherein before the transmitting end transmits the binary residual information and the synthesized image to the receiving end, the transmitting end maps the binary residual information into a mapped image containing binary residual information, and then transmits the mapped image and the synthesized image to the receiving end together;
and after the receiving end receives the mapping image containing the binary residual information, mapping the mapping image into the binary residual information.
3. The lossless transmission method of secret information according to claim 1, wherein the transmitting end further performs lossless compression on the binary residual information before mapping the binary residual information into a mapped image containing binary residual information; mapping the lossless compressed binary residual information into a mapping image containing the lossless compressed binary residual information, and sending the mapping image and the synthesized image to a receiving end;
after receiving a mapping image containing lossless compressed binary residual information, the receiving end firstly maps the mapping image into lossless compressed binary residual information, and then performs decompression operation corresponding to lossless compression to obtain the binary residual information.
4. A method for hiding secret information is characterized in that binary original secret information is synthesized into a synthesized image for hiding the secret information, and lossy binary secret information is extracted from the synthesized image according to a first rule; performing exclusive-or operation on the lossy binary secret information and the binary original secret information to obtain binary residual information, and transmitting the binary residual information and the composite image together as encrypted secret information;
receiving the binary residual information and the synthetic image; and converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual information to obtain binary original secret information.
5. The method according to claim 4, wherein before transmitting the binary residual information together with the composite image as encrypted secret information, the binary residual information is mapped into a mapped image containing binary residual information, and then transmitted together with the composite image as encrypted secret information.
6. The hiding method of secret information according to claim 5, further performing lossless compression on the binary residual information before mapping the binary residual information into a mapped image containing residual information; and mapping the lossless compressed binary residual information into a mapping image containing the lossless compressed binary residual information, and transmitting the mapping image and the synthesized image together as encrypted secret information.
7. A method for reading secret information is characterized in that binary residual information and a synthetic image are obtained; converting the synthesized image into lossy binary secret information according to a first rule, and comparing and combining the lossy binary secret information with the received binary residual error information to obtain binary original secret information, wherein the synthesized image refers to a synthesized image of hidden secret information obtained by synthesizing the binary original secret information; the binary residual information refers to binary residual information obtained by extracting lossy binary secret information from the synthesized image according to a first rule and performing exclusive-or operation on the lossy binary secret information and the binary original secret information.
8. The method according to claim 7, wherein when the acquired binary residual information is a mapping image containing binary residual information, the mapping image is mapped to the binary residual information.
9. The method according to claim 8, wherein when the obtained mapping image containing binary residual information is a mapping image containing lossless compressed binary residual information, mapping the mapping image containing lossless compressed binary residual information to lossless compressed binary residual information, and performing lossless compression decompression operation to obtain binary residual information.
10. A computer system comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of the preceding claims 1 to 9 when the computer program is executed.
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