CN108768581A - The hidden method of information and the acquisition methods of information - Google Patents
The hidden method of information and the acquisition methods of information Download PDFInfo
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- CN108768581A CN108768581A CN201810540632.5A CN201810540632A CN108768581A CN 108768581 A CN108768581 A CN 108768581A CN 201810540632 A CN201810540632 A CN 201810540632A CN 108768581 A CN108768581 A CN 108768581A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
- H04K1/00—Secret communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
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Abstract
This application involves a kind of hidden method of information and the acquisition methods of information.The hidden method of information includes：The bit sequence on the source bit stream precalculated position of public information is obtained, and complex-valued Gaussian random sequence generator is initialized using bit sequence, generates multiple Gauss random sequence；Band spectrum modulation is carried out to secret information according to multiple Gauss random sequence, obtains Gauss spread-spectrum signal；On the conventional spread-spectrum signal for public information that Gauss spread-spectrum signal is added to, mixed signal is obtained.The signal of communication that this method passes through pseudo- Gaussian secret information; so that mixed signal after embedded secret information is no matter from the characteristic component of time domain, the characteristic component of frequency domain or demodulation result; all tend to be identical with the signal for being not embedded into secret information transmission; it realizes while ensureing that information receiving end can normally recover secret information with public information; the not sentience for improving secret information, improves the concealment of covert communications process.
Description
Technical field
This application involves Information Hiding Techniques fields, the acquisition of hidden method and information more particularly to a kind of information
Method.
Background technology
Information hiding is to be hidden in confidential information in public information in confidence, then passes through open letter on open channel
Confidential information is transmitted in the transmission of breath, to ensure the imperceptible of confidential corespondence.
Currently, traditional Information Hiding Techniques are more to concentrate on text, image carries out on the carriers such as audio and video,
That is by the way that secret information to be embedded into original text, image is sent to target in the public informations such as audio and video
Information receiving end, but there is data mess code since the insertion of secret information frequently can lead to public information, detecting side tends to
Enough presence that hiding information is judged according to data mess code this feature, cause the concealment of secret information to be greatly reduced, even if
There is data mess code without result in public information in the insertion of secret information, and detecting side still can be by inversely deriving or to removing public affairs
The remaining information for opening information analyze and then judges the presence of secret information, the concealments of traditional Information Hiding Techniques compared with
It is low.
Invention content
Based on this, it is necessary to for the relatively low technical problem of the concealment of above-mentioned traditional Information Hiding Techniques, provide one
Hidden method, device, computer equipment and the storage medium of kind information and acquisition methods, device, the computer equipment of information
And storage medium.
A kind of hidden method of information, includes the following steps：
The bit sequence on the source bit stream precalculated position of public information is obtained, and is initialized again using the bit sequence
Number gaussian random sequence generator, generates multiple Gauss random sequence；
Band spectrum modulation is carried out to the coding of secret information according to the multiple Gauss random sequence, obtains the secret information
Gauss spread-spectrum signal；
The Gauss spread-spectrum signal is added on the conventional spread-spectrum signal of the public information, mixed signal is obtained.
The conventional spread spectrum of the public information that the Gauss spread-spectrum signal is added in one of the embodiments,
On signal, obtain mixed signal the step of, include the following steps：
Obtain the conventional spread-spectrum signal of the public information and the power sharing ratio of the Gauss spread-spectrum signal；
According to the power sharing ratio by the conventional spread-spectrum signal of the public information and the Gauss spread-spectrum signal
It is overlapped, obtains the mixed signal.
It is described in one of the embodiments, to be believed the conventional spread spectrum of the public information according to the power sharing ratio
Number and Gauss spread-spectrum signal the step of being overlapped, obtaining the mixed signal, include the following steps：
According toObtain mixed signal；
Wherein, λ1+λ2=1, λ1Indicate the power sharing ratio of the conventional spread-spectrum signal of the public information, λ2Indicate institute
State the power sharing ratio of Gauss spread-spectrum signal；S[n]Indicate the conventional spread-spectrum signal of the public information, X[n]Indicate the height
This spread-spectrum signal, S[n]Indicate the mixed signal, n=1,2 ..., N.
The length of the multiple Gauss random sequence and the conventional spread spectrum of the public information are believed in one of the embodiments,
Number chip lengths it is identical.
The step of bit sequence on the source bit stream precalculated position for obtaining public information in one of the embodiments,
It is further comprising the steps of before rapid：
The public affairs are determined respectively according to the information rate of the source bit stream of public information and the source bit stream of secret information
Open the first channel coding schemes of information and the second channel encoding scheme of the secret information；
Channel coding is carried out to the source bit stream of the public information according to the first determining channel coding schemes and obtains public affairs
Open the encoded signal of information；Channel coding is carried out to the source bit stream of the secret information according to the second encoding scheme and obtains secret
The encoded signal of information；
Band spectrum modulation is carried out to the encoded signal of the public information, obtains the conventional spread-spectrum signal of the public information.
A kind of concealing device of information, including：
First multiple Gauss random sequence acquisition module, the bit on source bit stream precalculated position for obtaining public information
Sequence, and complex-valued Gaussian random sequence generator is initialized using the bit sequence, generate multiple Gauss random sequence；
Gauss spread-spectrum signal acquisition module, for according to the multiple Gauss random sequence to the encoded signal of secret information into
Row band spectrum modulation obtains the Gauss spread-spectrum signal of the secret information；
Mixed signal acquisition module, the conventional spread spectrum letter for the public information that the Gauss spread-spectrum signal is added to
On number, mixed signal is obtained.
A kind of computer equipment, including memory and processor, the memory are stored with computer program, the processing
Device realizes following steps when executing the computer program：
The bit sequence on the source bit stream precalculated position of public information is obtained, and is initialized again using the bit sequence
Number gaussian random sequence generator, generates multiple Gauss random sequence；
Band spectrum modulation is carried out to the encoded signal of secret information according to the multiple Gauss random sequence, obtains the secret letter
The Gauss spread-spectrum signal of breath；
The Gauss spread-spectrum signal is added on the conventional spread-spectrum signal of the public information, mixed signal is obtained.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
Following steps are realized when row：
The bit sequence on the source bit stream precalculated position of public information is obtained, and is initialized again using the bit sequence
Number gaussian random sequence generator, generates multiple Gauss random sequence；
Band spectrum modulation is carried out to the encoded signal of secret information according to the multiple Gauss random sequence, obtains the secret letter
The Gauss spread-spectrum signal of breath；
The Gauss spread-spectrum signal is added on the conventional spread-spectrum signal of the public information, mixed signal is obtained.
The hidden method of above- mentioned information, by using public information source bit stream designated position bit sequence be used as with
Machine, initialization complex-valued Gaussian random sequence generator to generate a multiple Gauss random sequence, and using the multiple Gauss with
Machine sequence pair secret information carries out band spectrum modulation and is superimposed to the conventional spread-spectrum signal of public information, due to the communication of secret information
The height puppet Gaussian of signal so that no matter mixed signal after embedded secret information is from the spy of the characteristic component of time domain, frequency domain
It is seen in sign component or demodulation result, all tends to be identical with the signal for being not embedded into secret information transmission, realize and ensureing that information connects
While receiving end can normally recover secret information with public information, the not sentience of secret information is improved, is improved hidden
Cover the concealment of communication process.
A kind of acquisition methods of information obtain in the mixed signal obtained from the hidden method using above-mentioned information secret
Information includes the following steps：
It obtains and receives signal, and according to the source bit stream for receiving signal acquisition public information；
The bit sequence on the source bit stream precalculated position of the public information is obtained, and initial using the bit sequence
Change complex-valued Gaussian random sequence generator, generates multiple Gauss random sequence；
The conventional spread-spectrum signal that the public information is reconstructed according to the source bit stream of the public information is believed from the reception
The conventional spread-spectrum signal is removed in number obtains residual signal；
Despreading processing is carried out to the residual signal using the multiple Gauss random sequence, obtains the coding letter of secret information
Number.
It is described in one of the embodiments, that the residual signal is carried out at despreading using the multiple Gauss random sequence
It is further comprising the steps of after the step of managing, obtaining the encoded signal of secret information：
The source bit stream that channel decoding obtains the secret information is carried out to the encoded signal of the secret information.
A kind of acquisition device of information, including：
Signal acquisition module is received, receives signal for obtaining, and according to the source for receiving signal acquisition public information
Bit stream；
Second multiple Gauss random sequence acquisition module, on the source bit stream precalculated position for obtaining the public information
Bit sequence, and complex-valued Gaussian random sequence generator is initialized using the bit sequence, generate multiple Gauss random sequence；
Residual signal acquisition module, the routine for reconstructing the public information according to the source bit stream of the public information
Spread-spectrum signal removes the conventional spread-spectrum signal from the reception signal and obtains residual signal；
Secret information acquisition module, for being carried out at despreading to the residual signal using the multiple Gauss random sequence
Reason, obtains the encoded signal of secret information.
A kind of computer equipment, including memory and processor, the memory are stored with computer program, the processing
Device realizes following steps when executing the computer program：
It obtains and receives signal, and according to the source bit stream for receiving signal acquisition public information；
The bit sequence on the source bit stream precalculated position of the public information is obtained, and initial using the bit sequence
Change complex-valued Gaussian random sequence generator, generates multiple Gauss random sequence；
The conventional spread-spectrum signal that the public information is reconstructed according to the source bit stream of the public information is believed from the reception
The conventional spread-spectrum signal is removed in number obtains residual signal；
Despreading processing is carried out to the residual signal using the multiple Gauss random sequence, obtains the coding letter of secret information
Number.
A kind of computer readable storage medium, is stored thereon with computer program, and the computer program is held by processor
Following steps are realized when row：
It obtains and receives signal, and according to the source bit stream for receiving signal acquisition public information；
The bit sequence on the source bit stream precalculated position of the public information is obtained, and initial using the bit sequence
Change complex-valued Gaussian random sequence generator, generates multiple Gauss random sequence；
The conventional spread-spectrum signal that the public information is reconstructed according to the source bit stream of the public information is believed from the reception
The conventional spread-spectrum signal is removed in number obtains residual signal；
Despreading processing is carried out to the residual signal using the multiple Gauss random sequence, obtains the coding letter of secret information
Number.
The acquisition methods of above- mentioned information, by going out the source bit stream of public information from reception signal resolution and utilizing open letter
Bit sequence on the source bit stream precalculated position of breath initializes complex-valued Gaussian random sequence generator, acquisition and information transmitting terminal
Identical multiple Gauss random sequence believes the remaining of conventional spread-spectrum signal for removing public information using the multiple Gauss random sequence
Number despreading processing is carried out, to obtain secret information, wherein the source of complex-valued Gaussian random sequence generator and public information ratio
Spy stream designated position is collectively as key role, even if the docking collection of letters number of detecting side has carried out counteracting processing and has obtained residual signal,
Detecting side also can not obtain secret information from a unordered white Gaussian noise signal, effectively resist detecting side to signal of communication
Remove the further analysis of the residual signal after public information.
Description of the drawings
Fig. 1 is the applied environment figure of the acquisition methods of the hidden method and information of information in one embodiment of the invention；
Fig. 2 is the flow chart of the hidden method of information in one embodiment of the invention；
Fig. 3 is the flow chart of the hidden method of information in another embodiment of the present invention；
Fig. 4 is the flow chart of the acquisition methods of information in one embodiment of the invention；
Fig. 5 is the structural schematic diagram of the concealing device of information in one embodiment of the invention；
Fig. 6 is the structural schematic diagram of the concealing device of information in another embodiment of the present invention；
Fig. 7 is the structural schematic diagram of the acquisition device of information in one embodiment of the invention
Fig. 8 is the internal structure chart of one embodiment of the invention Computer equipment.
Specific implementation mode
It is with reference to the accompanying drawings and embodiments, right in order to make the object, technical solution and advantage of the application be more clearly understood
The application is further elaborated.It should be appreciated that specific embodiment described herein is only used to explain the application, not
For limiting the application.
The hidden method of information provided by the present application and the acquisition methods of information can be applied to as shown in Figure 1 answer
With in environment.Wherein, first terminal 110 and second terminal 120 are communicated by radio spread spectrum communication channel, first terminal
110 can be used as information transmitting terminal, and second terminal 120 can be used as information receiving end, to realize the transmission of secret information；Specifically
, first terminal 110 will on open radio spread spectrum communication channel by the way that secret information to be hidden in public information, then
Under cover the public information of secret information is as communication signal transmissions to second terminal 120, communication of the second terminal 120 to acquisition
Signal carries out parsing and obtains public information therein and secret information.Wherein, first terminal 110 and second terminal 120 can
With but be not limited to various personal computers, laptop, smart mobile phone, tablet computer and portable wearable device.
Referring to Fig. 2, Fig. 2 is the flow chart of the hidden method of information in one embodiment of the invention, provides a kind of information
Hidden method, in this way be applied to Fig. 1 in information transmitting terminal for illustrate, include the following steps：
Step S210：The bit sequence on the source bit stream precalculated position of public information is obtained, and using at the beginning of bit sequence
Beginningization complex-valued Gaussian random sequence generator generates multiple Gauss random sequence.
In this step, the source bit stream of public information refers to the digital signal data of the un-encoded equal operations of public information；
The precalculated position of the source bit stream of public information is Communication hiding receiving terminal and the position that transmitting terminal both sides specify jointly；Plural number
Gaussian random sequence generator the input phase in the case of the multiple Gauss random sequence that exports it is also identical, and the complex-valued Gaussian with
Machine sequence generator, which prestores, is stored in the receiving terminal and transmitting terminal of Communication hiding, that is to say, that information receiving end and information
Transmitting terminal prestores identical complex-valued Gaussian random sequence generator in advance, in the case where inputting identical data cases, information receiving end
And the multiple Gauss random sequence that information transmitting terminal obtains is identical.
Specifically, information transmitting terminal obtains the bit sequence in the precalculated position on the source bit stream of public information, by the ratio
Input value of the special sequence as complex-valued Gaussian random sequence generator makes complex-valued Gaussian random sequence generator generate a multiple height
This random sequence.
Step S220：Band spectrum modulation is carried out to the encoded signal of secret information according to multiple Gauss random sequence, is obtained secret
The Gauss spread-spectrum signal of information.
In this step, the encoded signal of secret information refers to that the source bit stream of secret information passes through the number of Channel encoding operations
Word signal data；Information transmitting terminal carries out spread spectrum tune using the multiple Gauss random sequence of acquisition to the encoded signal of secret information
System, to obtain the Gauss spread-spectrum signal of secret information.Specifically, information transmitting terminal by using multiple Gauss random sequence into
The encoded signal of secret information after row channel coding carries out spread spectrum dot product, obtains the corresponding Gauss spread-spectrum signal of secret information.
Wherein, which has the signal characteristic similar to white Gaussian noise, realizes the signal of communication height of secret information
Pseudo- Gaussian.
Step S230：On the conventional spread-spectrum signal for public information that Gauss spread-spectrum signal is added to, mixed signal is obtained.
In this step, the conventional spread-spectrum signal of public information can be by having carried out the coding of the public information after channel coding
Signal using conventional frequency expansion sequence, such as etc. amplitudes pseudorandom spreading sequence, PN codes etc., progress band spectrum modulation acquisition；Specifically,
Gauss spread-spectrum signal can be by being directly superimposed to the conventional spread-spectrum signal of public information by information transmitting terminal with low power mode
On, to obtain mixed signal.
The hidden method of above- mentioned information, by using public information source bit stream designated position bit sequence be used as with
Machine, initialization complex-valued Gaussian random sequence generator to generate a multiple Gauss random sequence, and using the multiple Gauss with
Machine sequence secret information carries out band spectrum modulation and is superimposed to the conventional spread-spectrum signal of public information, since the communication of secret information is believed
Number height puppet Gaussian so that no matter the signal sent after embedded secret information is from the feature of the characteristic component of time domain, frequency domain
It is seen in component or demodulation result, all tends to be identical with the signal for being not embedded into secret information transmission, realized and ensureing information reception
While end can normally recover secret information with public information, the not sentience of secret information is improved, is improved hidden
The robustness and concealment of communication process.Further, even if it includes secret information that detecting side, which is known in signal of communication, but it is multiple
The source bit stream designated position of number gaussian random sequence generator and public information can effectively be supported collectively as key role
Imperial detecting side removes signal of communication the further analysis of the residual signal after public information, i.e., random in no acquisition multiple Gauss
In the case of sequence, residual signal tends to the white noise signal of Gaussian distributed, and detecting side can not carry out residual signal inverse
Decoding obtains secret information.
Optionally, multiple Gauss random sequence can be the chip lengths of the conventional spread-spectrum signal of a length and public information
It is identical, meet the random sequence that mean value is 0, variance is 1.
Gauss spread-spectrum signal is added on the conventional spread-spectrum signal of public information, is obtained in one of the embodiments,
It is further comprising the steps of after the step of mixed signal：Mixed signal is sent to information receiving end according to predetermined power.
In the present embodiment, when subsequently carrying out signal transmission, information transmitting terminal is sent out using the power that open channel is formulated
Rule is sent to send mixed signal.It is somebody's turn to do specifically, information transmitting terminal is sent with the power of formulation simultaneously on the channels I and the channels Q
Mixed signal, difference is excessive on the channels I and the channels Q leads to the discovery of the side of detecting for the signal received to avoid information receiving end
The presence of secret information.
Gauss spread-spectrum signal is added on the conventional spread-spectrum signal of public information, is obtained in one of the embodiments,
The step of mixed signal, includes the following steps：Obtain the conventional spread-spectrum signal of public information and the power of Gauss spread-spectrum signal
Allocation proportion；The conventional spread-spectrum signal of public information and Gauss spread-spectrum signal are overlapped according to power sharing ratio, obtained
Obtain mixed signal.
In the present embodiment, power sharing ratio can be previously according to public information and the spread-spectrum signal feature of secret information
Setting；Specifically, information transmitting terminal divides the conventional spread-spectrum signal of public information and Gauss spread-spectrum signal with certain power
Proportioning is overlapped, to ensure the correctness of public information and secret information reception.
Further, in one of the embodiments, according to power sharing ratio by the conventional spread-spectrum signal of public information
And Gauss spread-spectrum signal is overlapped, obtain mixed signal the step of, include the following steps：It is obtained according to following formula (1)
Mixed signal；
Wherein, λ1+λ2=1, λ1Indicate the power sharing ratio of the conventional spread-spectrum signal of public information, λ2Indicate that Gauss expands
The power sharing ratio of frequency signal；S[n]Indicate the conventional spread-spectrum signal of the public information, X[n]Indicate that the Gauss spreads letter
Number, S[n]Indicate the mixed signal, n=1,2 ..., N.
Specifically, in order to ensure that the correctness that public information and secret information receive is mixed under identical channel situation
It closes the otherness between signal and other signals of communication without nested secret information and to be maintained at wireless channel and reasonably fluctuate
Under level, λ1With λ2Between relationship could be provided as：λ1≥20λ2, i.e. the power level of the conventional spread-spectrum signal of public information
Account for 95% or more of mixed signal power level.
In one of the embodiments, obtain public information source bit stream precalculated position on bit sequence the step of it
Before, it is further comprising the steps of：Distinguished according to the information rate of the source bit stream of public information and the source bit stream of secret information
Determine the first channel coding schemes of public information and the second channel encoding scheme of secret information；According to the first determining letter
Road encoding scheme carries out the source bit stream of public information the encoded signal that channel coding obtains public information；According to the second coding
Scheme carries out the source bit stream of secret information the encoded signal that channel coding obtains secret information；To the coding letter of public information
Number carry out band spectrum modulation, obtain the conventional spread-spectrum signal of public information.
In the present embodiment, the information rate of the source bit stream of source bit stream and secret information based on public information is right
The source bit stream of public information and the source bit stream of secret information use different channel coding schemes, are obtaining channel coding side
After case, channel coding is carried out to public information and secret information, to improve the reliability of communication, then to having carried out channel volume
The encoded signal of public information after code using conventional frequency expansion sequence, such as etc. amplitudes pseudorandom spreading sequence, PN codes etc., progress
Band spectrum modulation；Specifically, since the information rate of the source bit stream of secret information is much smaller than the letter of the source bit stream of public information
Rate is ceased, code check lower channel coding schemes may be used, the source bit stream of secret information is encoded, to ensure secret
Information remains able to be properly received under the scene of low signal-to-noise ratio.
Referring to Fig. 3, Fig. 3 is the flow chart of the hidden method of information in another embodiment of the present invention, in the present embodiment, letter
The hidden method of breath includes the following steps：
Step S310：Distinguished according to the information rate of the source bit stream of public information and the source bit stream of secret information true
Determine the first channel coding schemes of public information and the second channel encoding scheme of secret information.
In this step, the information rate of the source bit stream of source bit stream and secret information based on public information, to public affairs
Open information source bit stream and secret information source bit stream use different channel coding schemes, specifically, determine code check compared with
High channel coding schemes are the encoding scheme of the source bit stream of public information, determine the lower channel coding schemes of code check to secret
The encoding scheme of the source bit stream of confidential information, to ensure that secret information remains able to be properly received under the scene of low signal-to-noise ratio.
Step S320：Channel coding is carried out according to the first determining channel coding schemes to the source bit stream of public information to obtain
Obtain the encoded signal of public information；Channel coding is carried out to the source bit stream of secret information according to the second encoding scheme and obtains secret
The encoded signal of information.
In this step, channel coding is carried out to source bit stream by using determining channel coding schemes, acquisition has carried out
The digital signal of secret information and public information after channel coding.
Step S330：Band spectrum modulation is carried out to the encoded signal of public information, obtains the conventional spread-spectrum signal of public information.
In this step, the conventional spread-spectrum signal of public information is that the communication standard based on open wireless frequency expansion channel generates
The spread-spectrum signal S [n], n=1,2 ..., N of public information are carried, specifically, conventional spread-spectrum signal can be by having carried out channel volume
The encoded signal of public information after code such as uses to carry out band spectrum modulation acquisition at the amplitudes pseudorandom spreading sequence.
Step S340：The bit sequence on the source bit stream precalculated position of public information is obtained, and using at the beginning of bit sequence
Beginningization complex-valued Gaussian random sequence generator generates multiple Gauss random sequence.
In this step, it is assumed that the input of complex-valued Gaussian random sequence generator is K binary bits, then is based in advance about
The position set obtains the sequence that length is K bit from the source bit stream of public information, and by the sequence inputting to plural number
In gaussian random sequence generator, it is N so that complex-valued Gaussian random sequence generator is generated a length, and it is 0 to meet mean value, variance
It indicates to carry the number of chips of the conventional spread-spectrum signal of public information for the random sequence PN of 1 multiple Gauss distribution, wherein N.
Step S350：Band spectrum modulation is carried out to the encoded signal of secret information according to multiple Gauss random sequence, is obtained secret
The Gauss spread-spectrum signal of information.
In this step, the encoded signal of the secret information after having carried out channel coding is carried out by using random sequence PN
Dot product is spread, the corresponding Gauss spread-spectrum signal X [n] of secret information, n=1,2 ..., N are obtained.
Step S360：Obtain the conventional spread-spectrum signal of public information and the power sharing ratio of Gauss spread-spectrum signal.
In this step, in order to ensure the correctness of public information and secret information reception, under identical channel situation,
Otherness between mixed signal and other signals of communication without nested secret information will be maintained at the rational wave of wireless channel
Under dynamic level, the relationship between conventional spread-spectrum signal and Gauss spread-spectrum signal could be provided as：λ1≥20λ2, (λ1Indicate open letter
The power sharing ratio of the conventional spread-spectrum signal of breath, λ2Indicate the power sharing ratio of Gauss spread-spectrum signal), i.e. public information
The power level of conventional spread-spectrum signal accounts for 95% or more of mixed signal power level.
Step S370：According toObtain mixed signal, wherein λ1+λ2=1, λ1Indicate open
The power sharing ratio of the conventional spread-spectrum signal of information, λ2Indicate the power sharing ratio of Gauss spread-spectrum signal, S[n]Described in expression
The conventional spread-spectrum signal of public information, X[n]Indicate the Gauss spread-spectrum signal, S[n]Indicate the mixed signal, n=1,
2,...,N。
In this step, Gauss spread-spectrum signal be added in a manner of low power powerful public information etc. amplitudes spread spectrum
On signal, mixed signal is obtained, when subsequently carrying out signal transmission, information transmitting terminal is sent out using the power that open channel is formulated
Rule is sent to send mixed signal.
From the angle of signal detection, the signal of communication of the not nested secret information of receiver reception one of the side of detecting is logical
It is often a conventional spread-spectrum signal by noise pollution, what is obtained after being added based on two independent gaussian signals is still
One gaussian signal this mathematical principle, the mixed signal that the receiver of the side of detecting receives a nested secret information are still
One conventional spread-spectrum signal by noise pollution, the signal sent after embedded secret information no matter from the characteristic component of time domain,
It is seen on the characteristic component or demodulation result of frequency domain, all tends to be identical with the signal for being not embedded into secret information transmission, detecting side is difficult
With the presence for the information transport behavior that smells out secrets, even if detecting side knows the presence of secret information transport behavior and to receiving
Signal carries out the counteracting of conventional spread-spectrum signal, but remaining signal is still a unordered white Gaussian noise signal, is not being had
In the case of having identical multiple Gauss random sequence, detecting side can not make Gao Zhun to secret information present in remaining signal
The court verdict of true property.
The hidden method of above- mentioned information, by using public information source bit stream designated position bit sequence be used as with
Machine, initialization complex-valued Gaussian random sequence generator to generate a multiple Gauss random sequence, and using the multiple Gauss with
Machine sequence secret information carries out band spectrum modulation and is superimposed to the conventional spread-spectrum signal of public information, since the communication of secret information is believed
Number height puppet Gaussian so that no matter the signal sent after embedded secret information is from the feature of the characteristic component of time domain, frequency domain
It is seen in component or demodulation result, all tends to be identical with the signal for being not embedded into secret information transmission, realized and ensureing information reception
While end can normally recover secret information with public information, the not sentience of secret information is improved, is improved hidden
The robustness and concealment of communication process.
Referring to Fig. 4, Fig. 4 is the flow chart of the acquisition methods of information in one embodiment of the invention, provides a kind of information
Acquisition methods, in this way be applied to Fig. 1 in information receiving end for illustrate, include the following steps：
Step S410：It obtains and receives signal, and according to the source bit stream for receiving signal acquisition public information.
In this step, receive signal can refer to information transmitting terminal send mixed signal after transmission channel, by believing
The signal that acquires of breath receiving terminal, it is contemplated that exist on wireless channel other a large amount of signals of communication and wireless channel when
Denaturation receives the mixed signal that signal is often not exclusively equal to information transmitting terminal transmission；Information receiving end is collected mail by docking
Number despread-and-demodulation is carried out, and then parses the source bit stream of public information.
Specifically, information receiving end can dock number canonical algorithm progress channel for using open spread spectrum communication channel of collecting mail
Estimation obtains channel model parameters, so that carrying out despread-and-demodulation according to the channel model parameters docking collection of letters number obtains channel volume
Code public information, then to this channel coding public information carry out channel decoding obtain public information source bit stream.
Step S420：The bit sequence on the source bit stream precalculated position of public information is obtained, and using at the beginning of bit sequence
Beginningization complex-valued Gaussian random sequence generator generates multiple Gauss random sequence.
In this step, the precalculated position of the source bit stream of public information is that Communication hiding receiving terminal and transmitting terminal both sides are total
With specified position；Complex-valued Gaussian random sequence generator the input phase in the case of the multiple Gauss random sequence that exports also phase
Together, and the complex-valued Gaussian random sequence generator is pre-stored within information receiving end and information transmitting terminal.Secret information docks
It collects mail after number source bit stream for carrying out parsing acquisition public information, utilizes the bit on the source bit stream precalculated position of public information
Sequence initialization complex-valued Gaussian random sequence generator obtains multiple Gauss random sequence identical with information transmitting terminal.
Step S430：The conventional spread-spectrum signal that public information is reconstructed according to the source bit stream of public information, from reception signal
The conventional spread-spectrum signal of middle removal obtains residual signal.
In this step, information receiving end is reconstructed using the source bit stream of public information in the mixed signal of information transmitting terminal
Public information conventional spread-spectrum signal, to from receive signal in directly offset the routine spread-spectrum signal ingredient, including
The residual signal of secret information.
Specifically, information receiving end carries out the source bit stream of public information the coding that channel coding obtains channel coding
Signal, and the mixing letter that band spectrum modulation reconstructs information transmitting terminal is carried out to the encoded signal according to the channel model parameters of acquisition
Conventional spread-spectrum signal in number.
Step S440：Despreading processing is carried out to residual signal using multiple Gauss random sequence, obtains the coding of secret information
Signal.
In this step, information receiving end solves residual signal using multiple Gauss stochastic ordering identical with information transmitting terminal
Expand, to obtain the secret information of information transmitting terminal transmission.Specifically, information receiving end believes residue using multiple Gauss stochastic ordering
It number is de-spread, obtains the encoded signal of secret information.
The acquisition methods of above- mentioned information, by going out the source bit stream of public information from reception signal resolution and utilizing open letter
Bit sequence on the source bit stream precalculated position of breath initializes complex-valued Gaussian random sequence generator, acquisition and information transmitting terminal
Identical multiple Gauss random sequence believes the remaining of conventional spread-spectrum signal for removing public information using the multiple Gauss random sequence
Number despreading processing is carried out, to obtain secret information, wherein the source of complex-valued Gaussian random sequence generator and public information ratio
Spy stream designated position is collectively as key role, even if the docking collection of letters number of detecting side has carried out counteracting processing and has obtained residual signal,
Detecting side also can not obtain secret information from a unordered white Gaussian noise signal, effectively resist detecting side to signal of communication
Remove the further analysis of the residual signal after public information.
Despreading processing is carried out to residual signal using multiple Gauss random sequence in one of the embodiments, is obtained secret
It is further comprising the steps of after the step of encoded signal of information：Channel decoding acquisition is carried out to the encoded signal of secret information
The source bit stream of secret information.
In the present embodiment, information receiving end to residual signal carry out despreading acquire often one carried out channel
Encoded signal after coding subsequently carries out channel decoding to having carried out the encoded signal after channel coding, obtains secret information
Bit data.
It should be understood that although each step in the flow chart of Fig. 2 to Fig. 4 is shown successively according to the instruction of arrow,
But these steps are not the inevitable sequence indicated according to arrow to be executed successively.Unless expressly state otherwise herein, these
There is no stringent sequences to limit for the execution of step, these steps can execute in other order.Moreover, in Fig. 2 to Fig. 4
At least part step may include that either these sub-steps of multiple stages or stage are not necessarily same to multiple sub-steps
One moment executed completion, but can execute at different times, and the execution in these sub-steps or stage sequence is also not necessarily
Be carry out successively, but can with other steps either the sub-step of other steps or at least part in stage in turn or
Alternately execute.
According to the hidden method of above- mentioned information, the present invention also provides a kind of concealing devices of information, below with regard to the present invention's
The embodiment of the concealing device of information is described in detail.
Referring to Fig. 5, Fig. 5 is the structural schematic diagram of the concealing device of information in one embodiment of the invention, in the present embodiment
It is illustrated by taking information transmitting terminal as an example, the concealing device of information, including：First multiple Gauss random sequence acquisition module 510, height
This spread-spectrum signal acquisition module 520 and mixed signal acquisition module 530, wherein：
First multiple Gauss random sequence acquisition module 510, on the source bit stream precalculated position for obtaining public information
Bit sequence, and complex-valued Gaussian random sequence generator is initialized using bit sequence, generate multiple Gauss random sequence；
Gauss spread-spectrum signal acquisition module 520, for according to multiple Gauss random sequence to the encoded signal of secret information into
Row band spectrum modulation obtains the Gauss spread-spectrum signal of secret information；
Mixed signal acquisition module 530, for the conventional spread-spectrum signal for public information that Gauss spread-spectrum signal is added to,
Obtain mixed signal.
Mixed signal acquisition module 530 is used to obtain the conventional spread-spectrum signal of public information in one of the embodiments,
And the power sharing ratio of Gauss spread-spectrum signal；According to power sharing ratio by the conventional spread-spectrum signal and height of public information
This spread-spectrum signal is overlapped, and obtains mixed signal.
Mixed signal acquisition module 530 is used for basis in one of the embodiments,It obtains
Mixed signal；Wherein, λ1+λ2=1, λ1Indicate the power sharing ratio of the conventional spread-spectrum signal of public information, λ2Indicate that Gauss expands
The power sharing ratio of frequency signal；S[n]Indicate the conventional spread-spectrum signal of the public information, X[n]Indicate that the Gauss spreads letter
Number, S[n]Indicate the mixed signal, n=1,2 ..., N.
The chip of the conventional spread-spectrum signal of the length of multiple Gauss random sequence and public information in one of the embodiments,
Length is identical.
It is the structural schematic diagram of the concealing device of information in another embodiment of the present invention, the present embodiment referring to Fig. 6, Fig. 6
In, the concealing device of information further includes channel coding module 540, and channel coding module 540 is used for the source ratio according to public information
The information rate of the source bit stream of spy's stream and secret information determines the first channel coding schemes of public information and secret respectively
The second channel encoding scheme of confidential information；Letter is carried out to the source bit stream of public information according to the first determining channel coding schemes
Road coding obtains the encoded signal of public information；Channel coding is carried out to the source bit stream of secret information according to the second encoding scheme
Obtain the encoded signal of secret information；Band spectrum modulation is carried out to the encoded signal of public information, the conventional of public information is obtained and expands
Frequency signal.
According to the acquisition methods of above- mentioned information, the present invention also provides a kind of acquisition device of information, below with regard to the present invention's
The embodiment of the concealing device of information is described in detail.
Referring to Fig. 7, Fig. 7 is the structural schematic diagram of the acquisition device of information in one embodiment of the invention, in the present embodiment,
The acquisition device of information includes：
Signal acquisition module 610 is received, receives signal for obtaining, and according to the source ratio for receiving signal acquisition public information
Spy's stream；
Second multiple Gauss random sequence acquisition module 620, on the source bit stream precalculated position for obtaining public information
Bit sequence, and complex-valued Gaussian random sequence generator is initialized using bit sequence, generate multiple Gauss random sequence；
Residual signal acquisition module 630 is spread for reconstructing the conventional of public information according to the source bit stream of public information
Signal obtains residual signal from the conventional spread-spectrum signal of removal in signal is received；
Secret information acquisition module 640 is obtained for carrying out despreading processing to residual signal using multiple Gauss random sequence
The encoded signal of secret information.
One embodiment wherein, secret information acquisition module 640 carry out channel for the encoded signal to secret information
Decoding obtains the source bit stream of secret information.
The specific of concealing device about information limits the restriction that may refer to the hidden method above for information, closes
The restriction of the acquisition methods above for information is may refer in the specific restriction of the acquisition device of information, it is no longer superfluous herein
It states.Modules in the concealing device of above- mentioned information and the acquisition device of information can be fully or partially through software, hardware
And combinations thereof realize.Above-mentioned each module can be embedded in or in the form of hardware independently of in the processor in computer equipment,
It can in a software form be stored in the memory in computer equipment, the above modules pair are executed in order to which processor calls
The operation answered.
In one embodiment, a kind of computer equipment is provided, which can be terminal, internal structure
Figure can be as shown in Figure 8.The computer equipment includes the processor connected by system bus, memory, network interface, display
Screen and input unit.Wherein, the processor of the computer equipment is for providing calculating and control ability.The computer equipment is deposited
Reservoir includes non-volatile memory medium, built-in storage.The non-volatile memory medium is stored with operating system and computer journey
Sequence.The built-in storage provides environment for the operation of operating system and computer program in non-volatile memory medium.The calculating
The network interface of machine equipment is used to communicate by network connection with external terminal.When the computer program is executed by processor with
Realize a kind of hidden method of information or the acquisition methods of information.The display screen of the computer equipment can be liquid crystal display or
The input unit of person's electric ink display screen, the computer equipment can be the touch layer covered on display screen, can also be meter
Button, trace ball or the Trackpad being arranged on machine equipment shell are calculated, can also be external keyboard, Trackpad or mouse etc..
It will be understood by those skilled in the art that structure shown in Fig. 8, is only tied with the relevant part of application scheme
The block diagram of structure does not constitute the restriction for the computer equipment being applied thereon to application scheme, specific computer equipment
May include either combining certain components than more or fewer components as shown in the figure or being arranged with different components.
In one of the embodiments, the present invention also provides a kind of computer equipment, including memory and processor, deposit
Computer program is stored in reservoir, which realizes following steps when executing computer program：
The bit sequence on the source bit stream precalculated position of public information is obtained, and plural number height is initialized using bit sequence
This random sequence generator generates multiple Gauss random sequence；
Band spectrum modulation is carried out to the encoded signal of secret information according to multiple Gauss random sequence, obtains the Gauss of secret information
Spread-spectrum signal；
On the conventional spread-spectrum signal for public information that Gauss spread-spectrum signal is added to, mixed signal is obtained.
Processor is realized in execution computer program and Gauss spread-spectrum signal is added to openly in one of the embodiments,
On the conventional spread-spectrum signal of information, when obtaining the step of mixed signal, following steps are implemented：Obtain the routine of public information
The power sharing ratio of spread-spectrum signal and Gauss spread-spectrum signal；The conventional spread spectrum of public information is believed according to power sharing ratio
Number and Gauss spread-spectrum signal be overlapped, obtain mixed signal.
Processor is realized open letter according to power sharing ratio executing computer program in one of the embodiments,
The conventional spread-spectrum signal and Gauss spread-spectrum signal of breath are overlapped, and when obtaining the step of mixed signal, implement following step
Suddenly：According toObtain mixed signal；Wherein, λ1+λ2=1, λ1Indicate the conventional spread spectrum of public information
The power sharing ratio of signal, λ2Indicate the power sharing ratio of Gauss spread-spectrum signal；S[n]Indicate the routine of the public information
Spread-spectrum signal, X[n]Indicate the Gauss spread-spectrum signal, S[n]Indicate the mixed signal, n=1,2 ..., N.
The chip of the conventional spread-spectrum signal of the length of multiple Gauss random sequence and public information in one of the embodiments,
Length is identical.
Following steps are also realized when processor executes computer program in one of the embodiments,：According to public information
Source bit stream and secret information source bit stream information rate respectively determine public information the first channel coding schemes
And the second channel encoding scheme of secret information；According to the first determining channel coding schemes to the source bit stream of public information
Carry out the encoded signal that channel coding obtains public information；Letter is carried out to the source bit stream of secret information according to the second encoding scheme
Road coding obtains the encoded signal of secret information；Band spectrum modulation is carried out to the encoded signal of public information, obtains public information
Conventional spread-spectrum signal.
The present invention provides a kind of computer readable storage mediums in one of the embodiments, are stored thereon with calculating
Machine program, realizes following steps when computer program is executed by processor：
The bit sequence on the source bit stream precalculated position of public information is obtained, and plural number height is initialized using bit sequence
This random sequence generator generates multiple Gauss random sequence；
Band spectrum modulation is carried out to the encoded signal of secret information according to multiple Gauss random sequence, obtains the Gauss of secret information
Spread-spectrum signal；
On the conventional spread-spectrum signal for public information that Gauss spread-spectrum signal is added to, mixed signal is obtained.
Computer program is executed by processor realization and Gauss spread-spectrum signal is added to openly in one of the embodiments,
On the conventional spread-spectrum signal of information, when obtaining the step of mixed signal, following steps are implemented：Obtain the routine of public information
The power sharing ratio of spread-spectrum signal and Gauss spread-spectrum signal；The conventional spread spectrum of public information is believed according to power sharing ratio
Number and Gauss spread-spectrum signal be overlapped, obtain mixed signal.
Computer program is executed by processor realization according to power sharing ratio by open letter in one of the embodiments,
The conventional spread-spectrum signal and Gauss spread-spectrum signal of breath are overlapped, and when obtaining the step of mixed signal, implement following step
Suddenly：According toObtain mixed signal；Wherein, λ1+λ2=1, λ1Indicate the conventional spread spectrum of public information
The power sharing ratio of signal, λ2Indicate the power sharing ratio of Gauss spread-spectrum signal；S[n]Indicate the routine of the public information
Spread-spectrum signal, X[n]Indicate the Gauss spread-spectrum signal, S[n]Indicate the mixed signal, n=1,2 ..., N.
The chip of the conventional spread-spectrum signal of the length of multiple Gauss random sequence and public information in one of the embodiments,
Length is identical.
Following steps are also realized when computer program is executed by processor in one of the embodiments,：According to open letter
The information rate of the source bit stream of breath and the source bit stream of secret information determines the first channel coding side of public information respectively
The second channel encoding scheme of case and secret information；According to the first determining channel coding schemes to the source bit of public information
Stream carries out the encoded signal that channel coding obtains public information；The source bit stream of secret information is carried out according to the second encoding scheme
Channel coding obtains the encoded signal of secret information；Band spectrum modulation is carried out to the encoded signal of public information, obtains public information
Conventional spread-spectrum signal.
In one of the embodiments, the present invention also provides a kind of computer equipment, including memory and processor, deposit
Computer program is stored in reservoir, which realizes following steps when executing computer program：
It obtains and receives signal, and according to the source bit stream for receiving signal acquisition public information；
The bit sequence on the source bit stream precalculated position of public information is obtained, and plural number height is initialized using bit sequence
This random sequence generator generates multiple Gauss random sequence；
The conventional spread-spectrum signal that public information is reconstructed according to the source bit stream of public information removes routine from receiving in signal
Spread-spectrum signal obtains residual signal；
Despreading processing is carried out to residual signal using multiple Gauss random sequence, obtains the encoded signal of secret information.
Following steps are also realized when processor executes computer program in one of the embodiments,：To secret information
Encoded signal carries out the source bit stream that channel decoding obtains secret information.
The present invention provides a kind of computer readable storage mediums in one of the embodiments, are stored thereon with calculating
Machine program, realizes following steps when computer program is executed by processor：
It obtains and receives signal, and according to the source bit stream for receiving signal acquisition public information；
The bit sequence on the source bit stream precalculated position of public information is obtained, and plural number height is initialized using bit sequence
This random sequence generator generates multiple Gauss random sequence；
The conventional spread-spectrum signal that public information is reconstructed according to the source bit stream of public information removes routine from receiving in signal
Spread-spectrum signal obtains residual signal；
Despreading processing is carried out to residual signal using multiple Gauss random sequence, obtains the encoded signal of secret information.
Following steps are also realized when computer program is executed by processor in one of the embodiments,：To secret information
Encoded signal carry out channel decoding obtain secret information source bit stream.
One of ordinary skill in the art will appreciate that realizing all or part of flow in above-described embodiment method, being can be with
Relevant hardware is instructed to complete by computer program, the computer program can be stored in a non-volatile computer
In read/write memory medium, the computer program is when being executed, it may include such as the flow of the embodiment of above-mentioned each method.Wherein,
Any reference to memory, storage, database or other media used in each embodiment provided herein,
Including non-volatile and/or volatile memory.Nonvolatile memory may include read-only memory (ROM), programming ROM
(PROM), electrically programmable ROM (EPROM), electrically erasable ROM (EEPROM) or flash memory.Volatile memory may include
Random access memory (RAM) or external cache.By way of illustration and not limitation, RAM is available in many forms,
Such as static state RAM (SRAM), dynamic ram (DRAM), synchronous dram (SDRAM), double data rate sdram (DDRSDRAM), enhancing
Type SDRAM (ESDRAM), synchronization link (Synchlink) DRAM (SLDRAM), memory bus (Rambus) direct RAM
(RDRAM), direct memory bus dynamic ram (DRDRAM) and memory bus dynamic ram (RDRAM) etc..
Each technical characteristic of above example can be combined arbitrarily, to keep description succinct, not to above-described embodiment
In each technical characteristic it is all possible combination be all described, as long as however, the combination of these technical characteristics be not present lance
Shield is all considered to be the range of this specification record.
The several embodiments of the application above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, under the premise of not departing from the application design, various modifications and improvements can be made, these belong to the protection of the application
Range.Therefore, the protection domain of the application patent should be determined by the appended claims.
Claims (11)
1. a kind of hidden method of information, which is characterized in that include the following steps：
The bit sequence on the source bit stream precalculated position of public information is obtained, and plural number height is initialized using the bit sequence
This random sequence generator generates multiple Gauss random sequence；
Band spectrum modulation is carried out to the encoded signal of secret information according to the multiple Gauss random sequence, obtains the secret information
Gauss spread-spectrum signal；
The Gauss spread-spectrum signal is added on the conventional spread-spectrum signal of the public information, mixed signal is obtained.
2. the hidden method of information according to claim 1, which is characterized in that described to be superimposed the Gauss spread-spectrum signal
Onto the conventional spread-spectrum signal of the public information, obtain mixed signal the step of, include the following steps：
Obtain the conventional spread-spectrum signal of the public information and the power sharing ratio of the Gauss spread-spectrum signal；
The conventional spread-spectrum signal of the public information and the Gauss spread-spectrum signal are carried out according to the power sharing ratio
Superposition, obtains the mixed signal.
3. the hidden method of information according to claim 2, which is characterized in that described to be incited somebody to action according to the power sharing ratio
The conventional spread-spectrum signal of the public information and the Gauss spread-spectrum signal are overlapped, and obtain the step of the mixed signal
Suddenly, include the following steps：
According toObtain mixed signal；
Wherein, λ1+λ2=1, λ1Indicate the power sharing ratio of the conventional spread-spectrum signal of the public information, λ2Indicate the Gauss
The power sharing ratio of spread-spectrum signal；S[n]Indicate the conventional spread-spectrum signal of the public information, X[n]Indicate the Gauss spread spectrum
Signal, S[n]Indicate the mixed signal, n=1,2 ..., N.
4. the hidden method of information according to claim 1, which is characterized in that the length of the multiple Gauss random sequence with
The chip lengths of the conventional spread-spectrum signal of the public information are identical.
5. the hidden method of information according to claim 1, which is characterized in that the source bit stream for obtaining public information
It is further comprising the steps of before the step of bit sequence on precalculated position：
The open letter is determined respectively according to the information rate of the source bit stream of public information and the source bit stream of secret information
First channel coding schemes of breath and the second channel encoding scheme of the secret information；
Channel coding is carried out to the source bit stream of the public information according to the first determining channel coding schemes and obtains open letter
The encoded signal of breath；Channel coding is carried out to the source bit stream of the secret information according to the second encoding scheme and obtains secret information
Encoded signal；
Band spectrum modulation is carried out to the encoded signal of the public information, obtains the conventional spread-spectrum signal of the public information.
6. a kind of acquisition methods of information, which is characterized in that from hiding using 5 any one of them information described in any one of claim 1 to 5
Secret information is obtained in the mixed signal that method obtains, is included the following steps：
It obtains and receives signal, and according to the source bit stream for receiving signal acquisition public information；
The bit sequence on the source bit stream precalculated position of the public information is obtained, and is initialized again using the bit sequence
Number gaussian random sequence generator, generates multiple Gauss random sequence；
The conventional spread-spectrum signal that the public information is reconstructed according to the source bit stream of the public information, from the reception signal
It removes the conventional spread-spectrum signal and obtains residual signal；
Despreading processing is carried out to the residual signal using the multiple Gauss random sequence, obtains the encoded signal of secret information.
7. according to the acquisition methods for the information that claim 6 obtains, which is characterized in that described to utilize the multiple Gauss random sequence
It is further comprising the steps of after the step of carrying out despreading processing to the residual signal, obtain the encoded signal of secret information：
The source bit stream that channel decoding obtains the secret information is carried out to the encoded signal of the secret information.
8. a kind of concealing device of information, which is characterized in that including：
First multiple Gauss random sequence acquisition module, the bit sequence on source bit stream precalculated position for obtaining public information
Row, and complex-valued Gaussian random sequence generator is initialized using the bit sequence, generate multiple Gauss random sequence；
Gauss spread-spectrum signal acquisition module, for being expanded the encoded signal of secret information according to the multiple Gauss random sequence
Frequency modulation system obtains the Gauss spread-spectrum signal of secret information；
Mixed signal acquisition module, the conventional spread-spectrum signal for the public information that the Gauss spread-spectrum signal is added to
On, obtain mixed signal.
9. a kind of acquisition device of information, which is characterized in that including：
Signal acquisition module is received, receives signal for obtaining, and according to the source bit for receiving signal acquisition public information
Stream；
Second multiple Gauss random sequence acquisition module, the bit on source bit stream precalculated position for obtaining the public information
Sequence, and complex-valued Gaussian random sequence generator is initialized using the bit sequence, generate multiple Gauss random sequence；
Residual signal acquisition module is spread for reconstructing the conventional of the public information according to the source bit stream of the public information
Signal removes the conventional spread-spectrum signal from the reception signal and obtains residual signal；
Secret information acquisition module is obtained for carrying out despreading processing to the residual signal using the multiple Gauss random sequence
Obtain the encoded signal of secret information.
10. a kind of computer equipment, including memory and processor, the memory are stored with computer program, feature exists
In the processor realizes the hidden method of the information described in any one of claim 1 to 5 when executing the computer program
Or claim 6 to 7 any one of them information acquisition methods the step of.
11. a kind of computer readable storage medium, is stored thereon with computer program, which is characterized in that the computer program
Realize that hidden method or the claim 6 to 7 of the information described in any one of claim 1 to 5 are any when being executed by processor
The step of acquisition methods of information described in.
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Application publication date: 20181106 |