CN105025195A - Real-hidden and fake-display satellite data transmission method - Google Patents
Real-hidden and fake-display satellite data transmission method Download PDFInfo
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- CN105025195A CN105025195A CN201510374201.2A CN201510374201A CN105025195A CN 105025195 A CN105025195 A CN 105025195A CN 201510374201 A CN201510374201 A CN 201510374201A CN 105025195 A CN105025195 A CN 105025195A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- 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
- H04N1/32149—Methods relating to embedding, encoding, decoding, detection or retrieval operations
- H04N1/32267—Methods relating to embedding, encoding, decoding, detection or retrieval operations combined with processing of the image
- H04N1/32272—Encryption or ciphering
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- 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 provides a real-hidden and fake-display satellite data transmission method, and aims at solving the problems in data transmission safety and secrecy. After being processed by the method, satellite image data seems like other image data, and satellite secrete data is hidden; and after the transmission data is received, fake data processed by the transmitting end is directly obtained, and the reception end can directly recover the fake data to obtain real satellite image data and secret data. The method is based on information hiding and image processing, real data is hidden and fake data is displayed in the information transmission process, and the method is characterized by disguising information, hiding information, keeping information secret and preventing information from interception.
Description
Technical field
The present invention relates to a kind of method of transfer of data; stash in particular to a kind of real resolution of the view data transmitting, real content; transmit with other view data form; data volume does not increase; what others received is false data; thus protect the transmission of True Data, belong to communication (as data communication technology etc.) field.
Background technology
Current society is the society of an information, the safety problem of information has become urgent problems day by day, Information hiding is an important branch of information security also referred to as image watermarking, utilizes the visual redundancy of the mankind to be embedded in carrier by secret information, thus reaches the object of safe transmission secret information.
Camouflage transmission technology, domestic do not have particular study, and current spacecraft is not also applied.It is exactly that information transmission to space system " is set up defences " that camouflage transmission technology is applied to space, " manufacturing products for both peacetime and wartime us ", civil-military inosculation, can utilize commercial satellite to transmit secret information, also secret information can be become other insensitive information to carry out hiddenly handing down in a direct line from the master defeated, not expose our true intention.
Along with the development of science and technology, the high efficiency of transmission of view data and the safety of transmission become more and more important.Can accomplish, when not changing image size, to embed secret information in the picture by Information Hiding Techniques, thus realize the transmission of secret information and image.On the other hand, for remote sensing images, medical image and law image etc., require that carrier image can high quality resume after extraction secret information.
Information hiding is counted as a communication process usually, it be input as secret data waiting for transmission, what transmit in channel is disclosed carrier data, and what receive is then the carrier data being concealed with secret information.
Hide embedded mobile GIS for information about and be divided into two large classes: one is spatial domain embedded mobile GIS, and two is transform domain embedded mobile GIS.The data volume hidden is called absolute hidden capacity or hidden capacity, and hiding data volume is called relative hidden capacity or embedding rate with the ratio of carrier data amount, and general relative hidden capacity is far smaller than 1.
Summary of the invention
The technical problem that the present invention solves is: overcome the deficiencies in the prior art, a kind of camouflage satellite data transmission method is provided, solve the safe and secret problem of transfer of data, the method is based on Information hiding and image procossing, do not changing data volume, when not changing data format, carry out normal transfer of data, improve the transmission security of satellite data transmission system.
Technical scheme of the present invention: a kind of camouflage satellite data transmission method, step is as follows:
1) according to the size of satellite image A waiting for transmission, generate the image B of a width with size, or from image library, select a width with the equal-sized image of satellite image A as image B waiting for transmission, obtain the identification data of image B simultaneously;
2) with satellite image A subtracted image B waiting for transmission, obtain image E, image E is carried out data compression, obtain the packed data C of image E;
3) satellite image A waiting for transmission is compressed, obtain the packed data D of satellite image A, calculate the PSNR value obtaining satellite image A;
4) using image B as carrier image, the PSNR value of the identification data of above-mentioned packed data C, packed data D, image B, satellite image A, satellite secret data are merged into one group of data, be hidden in image B as secret information G after scramble, obtain stego-image B`;
5) stego-image B` is transmitted;
6) receiving terminal extracts the secret information G after scramble to the stego-image B` received, obtain after scrambling resumption compressing the identification data of rear packed data C, packed data D and image B, the PSNR value of satellite image A, carry out decompression again, obtain satellite image A and image E, the identification data reverse process according to image B obtains image B;
7) image B and image E is carried out add operation, the image A1 be restored, meanwhile, decompress according to the packed data D extracted and obtain another image A2;
8) the high image of a kind of quality is selected to obtain original satellite image A as recovery from image A1 and A2; Go out satellite secret data from the extracting data after scrambling resumption simultaneously.
Step 1) according to the size of satellite image A waiting for transmission, generate a width as follows with the concrete steps of the image B of size:
The entirety of satellite image A is carried out reducing process obtain little image A3 or select a fritter as little image A3 from the non-sensitive district of satellite image A; Afterwards image A3 is amplified, to obtain with satellite image A with the image of size as image B, the data after little image A3 compresses are as the identification data of image B.
Step 1) in from image library, select a width with the equal-sized image of satellite image A as the concrete grammar of image B waiting for transmission to be:
According to size and the type of image A, select from image data base, select same size, image of the same type as image B, wherein image data base is in advance by the camouflage test B1 that n kind is dissimilar, B2, B3 ... .Bn form, n is positive integer; Image B at the label of image data base as the identification data of image B.
The present invention's beneficial effect is compared with prior art:
(1) if current camouflage technology is based on the Information Hiding Techniques of routine, then can accomplish Information hiding, and cannot accomplish that carrier is hidden, and the present invention can be all hiding information, carrier;
(2) the present invention combines satellite image data itself and satellite secret data as secret information, is hidden in other image and transmits, and this width image is ostensible, and others is difficult to know hiding true picture information.
(3) what the current method of hiding Info had can accomplish " hidden true ", but is not easy to accomplish " showing vacation "; The present invention relates to a kind of authenticity of the view data transmitting, as true resolution, true content stash, with the transmission of other view data form, data volume does not increase, and what others received is false data, thus protects the transmission of True Data.
(4) capacity that method proposed by the invention hides secret information can be made fixing as required, and the amount therefore hiding satellite secret data also can set in advance, is convenient to hardware implementing.
(5) the present invention is the hiding combination with secret data of hiding of carrier, and technical scheme is unique, has the camouflage of carrier and the disguise of secret information, while hiding, have confidentiality and anti-intercepting and capturing.
Information security data transmission technology has been widely used in the spacecraft such as remote sensing satellite, space probe and all kinds of satellite data transmission system, will obtain broader applications from now on.Meanwhile, also more and more higher to the requirement of star epigraph transfer of data.
Accompanying drawing explanation
Fig. 1 is principle of the invention figure;
Fig. 2 is real satellite image A;
Fig. 3 is the image B waiting for transmission generated according to satellite image A;
Fig. 4 is the image B waiting for transmission chosen from database.
Embodiment
In order to verify the performance of algorithm in this paper, have employed in emulation experiment size be 512 × 512 8 bit gradation satellite image A and B two width images carry out camouflage transmission with recover, B is newly-generated image.
True picture is satellite image A, as Fig. 2; Carrier image B, as Fig. 2 and Fig. 3.
A kind of camouflage satellite data transmission method, concrete implementation step is as follows:
1) according to satellite data waiting for transmission: the size of the 8 bit grayscale image A of 512 × 512, the new images B of a width with size is generated by predetermined technological approaches, or from image library, select a width with the image of size as new images B waiting for transmission, obtain the identification data of image B, the identification data of image B accounts for 1/128 of total view data simultaneously;
2) with satellite image A subtracted image B waiting for transmission, obtain image E, image E is carried out data compression R1 doubly, obtains the packed data C of image E; Obtain the PSNR1 value of satellite image A=E+B; Data compression method can select JPEG2000 standard compression methods, as R1=16 times, and PSNR=39dB;
3) satellite image A waiting for transmission is compressed R2 doubly, obtain the packed data D of satellite image A, obtain the PSNR2 value of image A; As data compression method can select JPEG2000 standard compression methods, R2=8, PSNR=41dB, also can select the compression methods such as vector quantization (VQ);
4) using image B as carrier image, the PSNR value of the identification data of above-mentioned packed data C, packed data D and image B, satellite image A, satellite secret data are merged into one group of data, be hidden in image B as secret information G after scramble, the data volume of secret information G meets the requirement of hidden method hidden capacity, obtains stego-image B`; Disorder method can adopt general disorder method, and satellite secret data accounts for 1/32 of total view data.Information hiding can select LSB hidden method and other hidden method, and hidden capacity relative value can consider 2/8 even 4/8, is typically chosen in 2/ (R2), R2<R1;
5) stego-image B` is transmitted; As normal chnnel coding, modulation, demodulation, decoding etc.;
6) secret information after scramble is extracted to the stego-image B` received, obtain after scrambling resumption compressing the identification data of rear data C, packed data D and image B, the compression ratio PSNR value of image A, carry out decompression again, obtain satellite image A and image E, obtain receiving image B according to the identification data reverse process of image B: to table look-up according to label or according to little Nonlinear magnify;
7) image B and image E is carried out add operation, the image A1 be restored.Meanwhile, another image A2 is obtained according to the packed data D decompression extracted;
8) select PSNR value high from image A1 and A2, according to PSNR1 and PSNR2 select PSNR value high or according to the image A of the high image of the subjective judgement selection quality sentencing figure personnel as recovery, the satellite data namely received; Go out satellite secret data from the extracting data after scrambling resumption simultaneously.
Step 1) in generate piece image B by predetermined technological approaches as follows as the step of new images waiting for transmission: the entirety of satellite image A is carried out reducing process, obtain little image A3 as entirety reduces 64 times or select a fritter from the non-sensitive district of satellite image A, as the fritter at edge, account for 1/64 of the satellite image A gross area, as little image A3, again image A3 is amplified 64 times, to obtain with image A with the 512*512 image of size as image B, image A3 compresses r doubly as the data of r=2, account for 1/128 of total image data amount, as the identification data of image B, the quality of image B or resolution are lower than protosatellite image A, belong to the lower quality version image of image A, partial information only containing satellite image A,
Step 1) in from image library, select a width corresponding by predetermined technological approaches image B as follows as the step of new images waiting for transmission: according to size and the large type of satellite image A, select from a large image data base, select same size, image of the same type is as new images B, wherein image data base is in advance by the camouflage test B1 that n kind is dissimilar, B2, B3, Bn forms, n is positive integer, work as n=16, image B is 4 bits at the label of image data base as the identification data of image B, account for nybble, work as n=256, image B is 8 bits at the label of image data base as the identification data of image B, account for a byte.If large type is city image, ocean imagery, desert image, field image, mountain range image, meadow image, forest map picture, farmland image etc., similar is be all scenery, and portrait and scenery are not just similar.
As can be seen here, the present invention has carried out camouflage transmission satellite image A, satellite image A is can't see in transmission, can only see the image of this camouflage of image B, satellite secret data is hidden in image B and transmits simultaneously, and image B and satellite image A is too wide in the gap, therefrom do not see satellite image A, do not see the secret data of satellite, thus while the safe transmission ensureing satellite image data, also ensure that the safe transmission of satellite secret data yet.
The content be not described in detail in specification of the present invention belongs to the known technology of those skilled in the art.
Claims (3)
1. a camouflage satellite data transmission method, is characterized in that step is as follows:
1) according to the size of satellite image A waiting for transmission, generate the image B of a width with size, or from image library, select a width with the equal-sized image of satellite image A as image B waiting for transmission, obtain the identification data of image B simultaneously;
2) with satellite image A subtracted image B waiting for transmission, obtain image E, image E is carried out data compression, obtain the packed data C of image E;
3) satellite image A waiting for transmission is compressed, obtain the packed data D of satellite image A, calculate the PSNR value obtaining satellite image A;
4) using image B as carrier image, the PSNR value of the identification data of above-mentioned packed data C, packed data D, image B, satellite image A, satellite secret data are merged into one group of data, be hidden in image B as secret information G after scramble, obtain stego-image B`;
5) stego-image B` is transmitted;
6) receiving terminal extracts the secret information G after scramble to the stego-image B` received, obtain after scrambling resumption compressing the identification data of rear packed data C, packed data D and image B, the PSNR value of satellite image A, carry out decompression again, obtain satellite image A and image E, the identification data reverse process according to image B obtains image B;
7) image B and image E is carried out add operation, the image A1 be restored, meanwhile, decompress according to the packed data D extracted and obtain another image A2;
8) the high image of a kind of quality is selected to obtain original satellite image A as recovery from image A1 and A2; Go out satellite secret data from the extracting data after scrambling resumption simultaneously.
2. a kind of camouflage satellite data transmission method according to claim 1, is characterized in that: step 1) according to the size of satellite image A waiting for transmission, generate a width as follows with the concrete steps of the image B of size:
The entirety of satellite image A is carried out reducing process obtain little image A3 or select a fritter as little image A3 from the non-sensitive district of satellite image A; Afterwards image A3 is amplified, to obtain with satellite image A with the image of size as image B, the data after little image A3 compresses are as the identification data of image B.
3. a kind of camouflage satellite data transmission method according to claim 1, is characterized in that: step 1) in from image library, select a width with the equal-sized image of satellite image A as the concrete grammar of image B waiting for transmission to be:
According to size and the type of image A, select from image data base, select same size, image of the same type as image B, wherein image data base is in advance by the camouflage test B1 that n kind is dissimilar, B2, B3 ... .Bn forms, and n is positive integer; Image B at the label of image data base as the identification data of image B.
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| CN114598508A (en) * | 2022-02-21 | 2022-06-07 | 北京航空航天大学 | Hidden information transmission method and device based on Ether shop transaction |
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