CN108366370A - Quantify the information transferring method of privately owned asymmetric key based on radio channel characteristic - Google Patents
Quantify the information transferring method of privately owned asymmetric key based on radio channel characteristic Download PDFInfo
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- CN108366370A CN108366370A CN201810105180.8A CN201810105180A CN108366370A CN 108366370 A CN108366370 A CN 108366370A CN 201810105180 A CN201810105180 A CN 201810105180A CN 108366370 A CN108366370 A CN 108366370A
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- privately owned
- radio channel
- quantifying
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
- H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
- H04L9/0861—Generation of secret information including derivation or calculation of cryptographic keys or passwords
- H04L9/0875—Generation of secret information including derivation or calculation of cryptographic keys or passwords based on channel impulse response [CIR]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/02—Protecting privacy or anonymity, e.g. protecting personally identifiable information [PII]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L63/00—Network architectures or network communication protocols for network security
- H04L63/04—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks
- H04L63/0428—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload
- H04L63/0442—Network architectures or network communication protocols for network security for providing a confidential data exchange among entities communicating through data packet networks wherein the data content is protected, e.g. by encrypting or encapsulating the payload wherein the sending and receiving network entities apply asymmetric encryption, i.e. different keys for encryption and decryption
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/04—Key management, e.g. using generic bootstrapping architecture [GBA]
Abstract
Invention describes a kind of information transferring methods quantifying privately owned asymmetric key based on radio channel characteristic.Radio channel characteristic is measured by communicating pair, extracts respective private cipher key.One side of communication carries out xor operation again after needing the information transmitted first to carry out channel coding using private cipher key pair, realize the encryption to transmitting information.Recipient carries out xor operation using the information that its private cipher key pair receives, and realizes the decryption to transmitting information.Due to the influence of wireless channel and equipment feature, the private cipher key of communicating pair may be asymmetric, that is, has certain difference.The information of recipient's decryption needs to reuse channel error correction decoding, solves correctly transmission information.It can need not be reconciled by additional information using this method and privacy amplification process, the security information of realization sharing wireless channel feature are transmitted.
Description
Technical field
The present invention relates to information security tranmission techniques fields, privately owned not right more particularly to being quantified based on radio channel characteristic
Claim the information transferring method of key.
Background technology
The feature that measurement wireless channel is mainly based upon based on radio channel characteristic safety of physical layer technology is quantized into
The symmetrical key of communicating pair reuses the information of its key encryption upper layer transport.However, in actual communication system, by
In communicating pair communication link there may be a little difference, the radio channel characteristic of acquisition is not quite similar.Therefore, in order to
Symmetrical key can be obtained, needs introducing information blended in the previous safety of physical layer technology based on radio channel characteristic
Journey, by communicating pair interactive information reconciliation information, to obtain the consistent key of communicating pair.It is reconciled however, introducing information
By the radio channel characteristic information of inevitable leakage communicating pair secret.In order to solve the both sides that information reconciliation is brought
The leakage of secret radio channel characteristic information, communicating pair also need to further finally obtain to protect by privacy amplification process
Obtain safety and the randomness of key.Therefore, these processes will increase the final complexity for obtaining key.In addition, existing
In key generation techniques system based on radio channel characteristic, channel error correction coding is mostly used for the mistake for considering to reconcile in information
It is used in journey, for generating symmetrical key.In existing research, will channel error correction not encoded and will be based on wireless communication
The security information transmission that road feature key generates is combined together consideration.
Invention content
Above-mentioned in order to solve the problems, such as, the present invention is provided quantifies privately owned asymmetric key based on radio channel characteristic
Information transferring method by the method for the invention can be based on the radio channel characteristic that communicating pair measurement obtains, it would be desirable to letter
Breath passes to other side by way of safety, to avoid in directly generating encryption key method by radio channel characteristic in the past
Information reconciles and privacy amplification process, has better practicability, for this purpose, the present invention, which provides, is based on radio channel characteristic
The information transferring method for quantifying privately owned asymmetric key, includes following steps：
Step A, communicating pair A and B measure the double hairs of communication respectively to other side's channel by the pilot frequency sequence of each spontaneous emission
The radio channel characteristic that each measurement obtains is quantized into a kind of private cipher key, the private cipher key by channel characteristics, communicating pair
It is the asymmetric key of communicating pair；
The side A of step B, communication will need the information transmitted by carrying out channel error correction coding after pretreatment, generate channel
Bit sequence after Error Correction of Coding；
Step C, the side A of communication the channel error correction generated in step B encoded after bit sequence and step A in obtain
Private cipher key performs the encoding operation, and generates encrypted data flow；
Encrypted data flow is sent to B by the side A of step D, communication by overt channel；
Step E, the data flow that the side B of communication uses the private cipher key pair obtained in step A to be received from A are decoded behaviour
Make；
Step F, the side B of communication are decoded the data flow after operation to step E using channel encode-decode algorithm and carry out
Channel error correction coding and decoding；
Step G, the side B of communication is by the decoded bit sequence of channel into crossing and the processing of step B preprocessing process contraries
The information that A is transferred to B is obtained afterwards.
Further improvement of the present invention, the pilot frequency sequence in step A should be the subcarrier in frequency domain in multicarrier transmission systems
Time domain symbol sequence in pilot frequency sequence or single carrier transmitting system, the channel characteristics in step A, which should measure, to be obtained
Channel frequency amplitude response feature, or measure obtained channel time domain shock response feature, the quantizing process in step A
For, when channel characteristics be channel frequency amplitude response feature when, should be by the frequency domain amplitude response feature of channel in different sub-carrier
Range value be quantified as bit sequence corresponding with amplitude；When channel characteristics are channel time domain shock response feature, should will believe
The shock response range value of the time domain impulse response in road in different time points is quantified as bit sequence corresponding with amplitude.
Further improvement of the present invention, the private cipher key in step A should be by the A that communicates and the side B by corresponding channel measurement
As a result, by being quantized into bit sequence after pretreatment.
Further improvement of the present invention, step A preprocessing process include to carry out the result of channel measurement at transform domain
Reason or principal component analysis processing, extract A and the higher bit sequence of the side's B consistency and are quantized into the channel characteristics of measurement
Bit sequence by certain mode extract or permutation and combination changes.
Further improvement of the present invention, the pretreatment in step B include that the communication side A has been shared using communicating pair
The information that information and the frame number of transmission transmit needs is encrypted.
Further improvement of the present invention, the channel coding in step B, includes convolutional code, Turbo code, RS codes, LDPC
Code, Polar codes, and convert former transmission information to the code sequence longer than former transmission information, compare for correcting in transmission process
The coding method of special mistake.
Further improvement of the present invention, the encoding operation in step C include the channel that will be communicated the side A in step B and generate
The xor operation that the private cipher key that the side A obtains carries out bit-by-bit is communicated in bit sequence and step A after Error Correction of Coding.
Further improvement of the present invention, the decoding operate in step E, include by step D by communicate the transmission of the side A Lai
The xor operation that the private cipher key that the side B obtains carries out bit-by-bit is communicated in bit sequence and step A.
Further improvement of the present invention, the channel error correction coding and decoding in step F include that the communication side B uses error correcting code
The decoded bits of step E are corrected, the bit sequence before correct channel coding is obtained.
Further improvement of the present invention, the inverse operation in step G include that the communication side B has been shared using communicating pair
Information and the frame number of transmission the decoded bit sequence of the channel obtained in step F is decrypted.
The present invention provides the information transferring method for quantifying privately owned asymmetric key based on radio channel characteristic, double for communication
Side measures the channel characteristics obtained, and present invention key generation method different from the past devises a kind of information transferring method.By
It is possible to the shared channel information of leakage both sides' secret in information harmonic process, it is whole to increase system after addition privacy amplification process
The complexity of body.The method of the present invention is quantized into private cipher key by obtained channel characteristics are measured, directly and by channel coding
It is transferred to other side after needing the information transmitted to carry out xor operation.The private that other side is quantized by the channel characteristics for obtaining measurement
Channel error correction coding and decoding, the final information for obtaining transmission are carried out to the information of transmission after having key to carry out xor operation.Pass through
This method can realize that communicating pair obtains the information transmission of safety by radio channel characteristic without the help of information harmonic process.
Description of the drawings
Fig. 1 is present system flow chart；
Fig. 2 is that the present invention is based on the subcarrier in frequency domain amplitude channels characteristic patterns that wireless channel obtains；
Fig. 3 is that the present invention is based on the channel quantitative result figures that radio channel characteristic obtains；
Fig. 4 is that the present invention is based on the key bit figures that wireless channel quantized result obtains；
Fig. 5 is the instance graph that present system is implemented；
Fig. 6 is that the present invention is illustrated using the inventive method in the safe transmission performance and eavesdropping result for having listener-in
Figure.
Specific implementation mode
Present invention is further described in detail with specific implementation mode below in conjunction with the accompanying drawings：
The present invention provides the information transferring method for quantifying privately owned asymmetric key based on radio channel characteristic, through the invention
Method, can be based on the radio channel characteristic that communicating pair measurement obtains, it would be desirable to information passed to by way of safety
Other side, to avoid, the information in directly generating encryption key method by radio channel characteristic in the past reconciles and privacy is amplified
Journey has better practicability.
As an embodiment of the present invention, the present invention provides specific implementation system flow chart schematic diagram as shown in Figure 1.
Communicating pair Alice and Bob first measures channel characteristics by respective channel characteristics detecting pilot frequency P.In this reality
Apply in example, consider Alice and Bob based on wireless channel frequency domain amplitude characteristic.It is obtained by channel detection pilot frequency P, Alice
Slave Bob to Alice channel characteristics be HBA, the channel characteristics for the slave Alice to Bob that Bob is obtained are HAB.Its nothing obtained
Line channel frequency feature is as shown in Figure 2.It can be seen from the figure that due to the difference and communicating pair of communicating pair wireless channel
The difference of respective device, the wireless channel frequency domain feature obtained have certain difference.
Alice and Bob will measure obtained channel characteristics and is quantized into the private cipher key P tentatively obtained respectivelyAAnd PB.Wherein,
Due to being influenced by actually measuring, HBA≈HAB, therefore, the private cipher key H actually obtainedA≈HB.It obtains private cipher key
Process is as shown in Figure 3 and Figure 4.It can be seen in fig. 4 that 0/1 bit sequence in the private cipher key that Alice and Bob are finally obtained
Row have certain difference.
Therefore, in the present embodiment, we allow PAAnd PBMost bit is identical, but allows PAAnd PBHave a small amount of
Bit is different.In addition, Alice and Bob is in order to improve the randomness of private cipher key, it can be to tentatively obtaining private cipher key PA
And PBExtraction operation is carried out, i.e.,；
Wherein D is to extract depth.
Finally, Alice and Bob can be by repeatedly measuring wireless channel, and acquisition length is L with height random
Private cipher keyWith
Alice selections need the information M, Alice that are sent to Bob that the frame number F of transmission is added after information M, are combined into
Information MF.Information MF is encrypted by the key K shared in advance with Bob by Alice, obtains informationAlice selections one
The code check of kind channel error correction encryption algorithm, the channel coding algorithm is c, i.e., the message length after channel error correction coding is former transmission
The 1/c of message length.Alice is by informationBy channel coding, the information after channel coding is obtainedWherein,
Length be L.
Alice willAnd private cipher keyThe xor operation of bit-by-bit is carried out, the sequence S that will be transmitted is obtained.
Alice is by sequence S by public transmission to Bob.Bob passes through its privately owned keyWith the sequence of reception
S carries out xor operation, solves information
Bob is by channel error correction Encoding and Decoding, to the information of acquisitionIt is decoded, obtains into after crossing error correction
InformationFinally, Bob is by the key K that is shared in advance with Alice, by informationIt is decrypted, obtains information MF, and most
The information M of Alice transmission is extracted eventually.
Above-mentioned the method for the present invention total system embodiment figure is as shown in Figure 5.Safe letter is carried out using the inventive method
Transmission performance and the listener-in for ceasing transmission are as shown in Figure 6 by the performance of tapping channel trial decoding transmission information.By institute in figure
Show, transmitted into row information when being one group with 256 bits, when the signal-to-noise ratio of transmission environment is higher than 15dB, using the inventive method into
The packet error probability of row security information transmission is less than 10%, and the safe transmission of information may be implemented.And it is carried out after listener-in's eavesdropping
The decoded packet error probability of information is 100%, can not correctly solve the information of transmission.
The above described is only a preferred embodiment of the present invention, being not the limit for making any other form to the present invention
System, and according to the technical essence of the invention made by any modification or equivalent variations, still fall within present invention model claimed
It encloses.
Claims (10)
- Include following steps, feature 1. quantifying the information transferring method of privately owned asymmetric key based on radio channel characteristic It is：Step A, communicating pair A and B measure the channel that the double hairs of communication respectively arrive other side's channel by the pilot frequency sequence of each spontaneous emission The radio channel characteristic that each measurement obtains is quantized into a kind of private cipher key by feature, communicating pair, and the private cipher key is logical Believe the asymmetric key of both sides；The side A of step B, communication will need the information transmitted by carrying out channel error correction coding after pretreatment, generate channel error correction Bit sequence after coding；Step C, the side A of communication the channel error correction generated in step B is encoded after bit sequence and step A in obtain it is privately owned Key performs the encoding operation, and generates encrypted data flow；Encrypted data flow is sent to B by the side A of step D, communication by overt channel；Step E, the data flow that the side B of communication uses the private cipher key pair obtained in step A to be received from A are decoded operation；Step F, the side B of communication are decoded the data flow after operation to step E using channel encode-decode algorithm and carry out channel Error Correction of Coding decodes；The side B of step G, communication obtain the decoded bit sequence of channel into after crossing the processing with step B preprocessing process contraries The information of B is transferred to A.
- 2. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, It is characterized in that：Pilot frequency sequence in step A should be the subcarrier in frequency domain pilot frequency sequence in multicarrier transmission systems, or single load Time domain symbol sequence in wave Transmission system, the channel characteristics in step A should be that measure obtained channel frequency amplitude response special Sign, or obtained channel time domain shock response feature is measured, the quantizing process in step A is, when channel characteristics are channel When frequency domain amplitude response feature, the frequency domain amplitude response feature of channel should be quantified as and amplitude in the range value of different sub-carrier Corresponding bit sequence；When channel characteristics are channel time domain shock response feature, the time domain impulse of channel should be responded not Shock response range value with time point is quantified as bit sequence corresponding with amplitude.
- 3. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, Be characterized in that, the private cipher key in step A, should by the A communicated and the side B by corresponding channel measurement as a result, passing through pretreatment After be quantized into bit sequence.
- 4. the information transferring method according to claim 3 for quantifying privately owned asymmetric key based on radio channel characteristic, It being characterized in that, step A preprocessing process includes that the result of channel measurement is carried out transform-domain processing or principal component analysis processing, It extracts A and the higher bit sequence of the side's B consistency and passes through the bit sequence that the channel characteristics of measurement are quantized into certain Mode extract or permutation and combination changes.
- 5. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, It is characterized in that, the pretreatment in step B includes to communicate the frame number of information and transmission that the side A has been shared using communicating pair The information transmitted to needs is encrypted.
- 6. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, It is characterized in that, the channel coding in step B, includes convolutional code, Turbo code, RS codes, LDPC code, Polar codes, and original is passed Defeated information is converted into the code sequence longer than former transmission information, the coding method for correcting bit-errors in transmission process.
- 7. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, It is characterized in that, the encoding operation in step C, includes that will communicate the bit sequence after the channel error correction that the side A generates encodes in step B The xor operation that the private cipher key that the side A obtains carries out bit-by-bit is communicated in row and step A.
- 8. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, Be characterized in that, the decoding operate in step E, include by step D by communicate the side A transmission Lai bit sequence and step A in The private cipher key that the communication side B obtains carries out the xor operation of bit-by-bit.
- 9. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, It is characterized in that, the channel error correction coding and decoding in step F, includes that the communication side B uses error correcting code by the decoded bits of step E It is corrected, obtains the bit sequence before correct channel coding.
- 10. the information transferring method according to claim 1 for quantifying privately owned asymmetric key based on radio channel characteristic, It is characterized in that, the inverse operation in step G, includes the frame sequence for communicating information and transmission that the side B has been shared using communicating pair Number the decoded bit sequence of the channel obtained in step F is decrypted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810105180.8A CN108366370B (en) | 2018-02-02 | 2018-02-02 | A kind of information transferring method quantifying privately owned asymmetric key based on radio channel characteristic |
| PCT/CN2018/086477 WO2019148690A1 (en) | 2018-02-02 | 2018-05-11 | Information transmission method based on wireless channel feature quantized asymmetric private keys |
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| CN201810105180.8A CN108366370B (en) | 2018-02-02 | 2018-02-02 | A kind of information transferring method quantifying privately owned asymmetric key based on radio channel characteristic |
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| CN110071801A (en) * | 2019-04-24 | 2019-07-30 | 东南大学 | A kind of generation key part accord method of combination BBBSS agreement and BCH code |
| CN110086616A (en) * | 2019-05-10 | 2019-08-02 | 南京东科优信网络安全技术研究院有限公司 | Forward direction one-time pad secret communication method based on wireless channel |
| CN110336657A (en) * | 2019-07-03 | 2019-10-15 | 上海大学 | A kind of light OFDM dynamic key production method based on the characteristic of channel |
| CN111404587A (en) * | 2020-03-12 | 2020-07-10 | 东南大学 | Multi-user MIMO symmetrical channel characteristic obtaining method based on conjugate precoding |
| CN112104459A (en) * | 2020-09-10 | 2020-12-18 | 国网江苏省电力有限公司信息通信分公司 | Key generation method based on channel fingerprints and auxiliary data |
| CN112532328A (en) * | 2021-02-07 | 2021-03-19 | 中国人民解放军国防科技大学 | Channel characteristic quantization method and device, electronic equipment and storage medium |
| CN112533199A (en) * | 2020-11-25 | 2021-03-19 | 南京熊猫电子股份有限公司 | OFDM channel physical key generation method and device based on USRP and computer equipment |
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| CN114040392A (en) * | 2021-11-04 | 2022-02-11 | 东南大学 | Uniform quantization method based on median non-uniform normalization and applicable to uncoordinated wireless channel key generation system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110071801A (en) * | 2019-04-24 | 2019-07-30 | 东南大学 | A kind of generation key part accord method of combination BBBSS agreement and BCH code |
| CN110071801B (en) * | 2019-04-24 | 2021-09-07 | 东南大学 | Key generation part reconciliation method combining BBBSS protocol and BCH code |
| CN110086616B (en) * | 2019-05-10 | 2021-07-16 | 南京东科优信网络安全技术研究院有限公司 | Forward one-time pad secret communication method based on wireless channel |
| CN110086616A (en) * | 2019-05-10 | 2019-08-02 | 南京东科优信网络安全技术研究院有限公司 | Forward direction one-time pad secret communication method based on wireless channel |
| CN110336657A (en) * | 2019-07-03 | 2019-10-15 | 上海大学 | A kind of light OFDM dynamic key production method based on the characteristic of channel |
| CN110336657B (en) * | 2019-07-03 | 2022-02-08 | 上海大学 | Optical OFDM dynamic key generation method based on channel characteristics |
| CN111404587A (en) * | 2020-03-12 | 2020-07-10 | 东南大学 | Multi-user MIMO symmetrical channel characteristic obtaining method based on conjugate precoding |
| CN111404587B (en) * | 2020-03-12 | 2022-04-01 | 东南大学 | Multi-user MIMO symmetrical channel characteristic obtaining method based on conjugate precoding |
| CN112104459A (en) * | 2020-09-10 | 2020-12-18 | 国网江苏省电力有限公司信息通信分公司 | Key generation method based on channel fingerprints and auxiliary data |
| CN112533199A (en) * | 2020-11-25 | 2021-03-19 | 南京熊猫电子股份有限公司 | OFDM channel physical key generation method and device based on USRP and computer equipment |
| CN112532328B (en) * | 2021-02-07 | 2021-05-14 | 中国人民解放军国防科技大学 | Channel characteristic quantization method and device, electronic equipment and storage medium |
| CN112532328A (en) * | 2021-02-07 | 2021-03-19 | 中国人民解放军国防科技大学 | Channel characteristic quantization method and device, electronic equipment and storage medium |
| CN112906874A (en) * | 2021-04-06 | 2021-06-04 | 南京大学 | Convolutional neural network characteristic graph data compression method and device |
| CN114040392A (en) * | 2021-11-04 | 2022-02-11 | 东南大学 | Uniform quantization method based on median non-uniform normalization and applicable to uncoordinated wireless channel key generation system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108366370B (en) | 2019-08-02 |
| WO2019148690A1 (en) | 2019-08-08 |
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