CN107257280A - The wireless key generation method of channel estimation need not be carried out - Google Patents
The wireless key generation method of channel estimation need not be carried out Download PDFInfo
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- CN107257280A CN107257280A CN201710348815.2A CN201710348815A CN107257280A CN 107257280 A CN107257280 A CN 107257280A CN 201710348815 A CN201710348815 A CN 201710348815A CN 107257280 A CN107257280 A CN 107257280A
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- legitimate correspondence
- channel estimation
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Classifications
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- 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
- 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
- H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
- H04L9/0838—Key agreement, i.e. key establishment technique in which a shared key is derived by parties as a function of information contributed by, or associated with, each of these
-
- 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
-
- 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
- H04L9/0891—Revocation or update of secret information, e.g. encryption key update or rekeying
-
- 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
It is more particularly to a kind of to carry out the wireless key generation method of channel estimation the present invention relates to wireless communication technology field, including legitimate correspondence both sides arrange identical and send signal sequence in advance；Legitimate correspondence both sides select antenna and sending method respectively is used for signal transmitting and receiving；Legitimate correspondence both sides carry out a sample quantization using the same way docking collection of letters number, generate key sequence；Legitimate correspondence both sides carry out uniformity negotiation to the key sequence of generation, remove or correct the inconsistent position in both sides' generation key, obtain consistent key sequence；Legitimate correspondence both sides are handled obtained consistent key sequence using secret interpolator arithmetic respectively, obtain final key.The present invention makes legitimate correspondence both sides in normal course of communications, directly key is extracted from signal is received, so that recipient avoids the process of channel estimation.
Description
Technical field
The present invention relates to wireless communication technology field, more particularly to a kind of wireless key life that need not carry out channel estimation
Into method.
Background technology
With developing rapidly for wireless communication technology, a variety of safety problems present in radio communication are gradually revealed.
Under the conditions of traditional wire communication, user can realize that authorized user uses with unauthorized by way of setting up private line of communication
Physical isolation between family.For radio communication, there is broadcast characteristic in wireless signal, and transmission range is big, scope is wide, it is impossible to
As wire communication, by setting up, exclusive communication link ensures safety.Again due to the high level of existing wireless communications system
Protocol inheritance is from wired communication system, and the safety guarantee for physical layer is limited, therefore existing secure wireless communication is in physics
There is short slab in layer.
But on the other hand, because wireless environment is sufficiently complex, wireless channel has very strong stochastic behaviour, is a kind of day
Right stochastic source, and now there are some researches show for legitimate correspondence both sides, the up-downgoing channel of radio communication has reciprocity
Property, legitimate correspondence both sides can estimate to obtain identical channel parameter.Using wireless channel parameter as a kind of " fingerprint ", build only
It is stored in the secret communication pipeline between legitimate correspondence both sides, it is possible to make up the short slab that secure wireless communication exists in physical layer.
In recent years, research and development of the secure wireless communication field for extracting cipher key scheme using wireless channel parameter is fast
Speed, in this scenario, legitimate correspondence both sides are estimated up-downgoing wireless channel respectively, are carried from estimation gained channel parameter
Take key.But in future wireless system network scenarios, Internet of Things, the appearance of sensor network are existing physical layer key generation side
The research of case brings new challenge.In these new networks, communication node small volume, computing capability is limited, and needs length
Phase keeps work, it is necessary to by its power consumption limit in reduced levels.And in existing physical layer key generation scheme, channel estimation process
Larger expense will be caused, be no longer desirable for above-mentioned novel wireless communication network, it is necessary to take more suitable lightweight key
Generation method.
The content of the invention
For defect present in prior art, the present invention provides a kind of wireless key generation that need not carry out channel estimation
Method, makes legitimate correspondence both sides in normal course of communications, directly key is extracted from signal is received, so that recipient avoids
The process of channel estimation.
To achieve these goals, the present invention uses following technical scheme：
It is a kind of to carry out the wireless key generation method of channel estimation, comprise the following steps：
Step A, legitimate correspondence both sides arrange identical and send signal sequence in advance；
Step B, legitimate correspondence both sides select antenna and sending method respectively is used for signal transmitting and receiving；
Step C, legitimate correspondence both sides carry out a sample quantization using the same way docking collection of letters number, generate key sequence；
Step D, the key sequence that legitimate correspondence both sides generate to step C carries out uniformity negotiation, removes or corrects and be double
Inconsistent position in Fang Shengcheng keys, obtains consistent key sequence；
Step E, legitimate correspondence both sides are entered to the consistent key sequence obtained in step D using secret interpolator arithmetic respectively
Row processing, obtains final key.
Also include before step C, legitimate correspondence both sides mutually send previously arranged signal sequence, to the day selected in step B
The signal received on line is handled.
The legitimate correspondence both sides mutually send previously arranged signal sequence, the signal sequence using disclosed sequence or
The arbitrary sequence that legitimate correspondence both sides arrange in advance；Legitimate correspondence both sides sent in turn within coherence time previously arranged signal sequence or
Person sends previously arranged signal sequence using co-channel full duplex technology simultaneously.
Also include after step E, need to such as increase key length or more new key, go to step A or step B again
Start above-mentioned flow.
The wireless key generation method that channel estimation need not be carried out is applied to following scene：
A. the weaker lightweight communication scene of node signal disposal ability；
B. legitimate correspondence both sides are the scene of single antenna；
C. a side is multiple antennas in legitimate correspondence both sides or both sides are the scene of multiple antennas；
D. point-to-point communication scene；
E. point-to-multipoint delivery, i.e., node or base station centered on sender, with multiple recipient's nodes or use
The star structure wireless communication system at family.
In the step B, legitimate correspondence both sides select antenna respectively is used for signal transmitting and receiving, can be selected using any-mode
Antenna, legitimate correspondence both sides need not be identical for the selected mode of antenna, without agreement in advance.
The implementation method of the step D is：
Step D1, legitimate correspondence both sides send key agreement sequence in overt channel, remove or correct both sides' generation
Inconsistent position in key；
Step D2, if after once consulting, the key sequence of legitimate correspondence both sides is still inconsistent, repeat step D1, directly
To obtaining consistent key sequence.
Compared with prior art, the present invention has advantages below：
, can be in legitimate correspondence both sides without letter 1. the present invention need not carry out the wireless key generation method of channel estimation
Under conditions of road estimation, from the signal of reception, directly extract key, it is to avoid channel estimation process, reduce expense, be applicable
In the node computing capability such as Internet of Things, sensor network is relatively low, power limited scene.
Brief description of the drawings
Fig. 1 is a kind of schematic flow sheet for the wireless key generation method that need not carry out channel estimation of the present invention；
Fig. 2 is point-to-point communication schematic diagram of the present invention in the case where legitimate correspondence both sides are multiple antennas scene；
Fig. 3 is point-to-point communication schematic diagram of the present invention in the case where legitimate correspondence both sides are single antenna scene；
Fig. 4 is point-to-multipoint delivery schematic diagram of the present invention in the case where each communication node is multiple antennas scene；
Fig. 5 is point-to-multipoint delivery schematic diagram of the present invention in the case where each communication node is single antenna scene.
Embodiment
With reference to the accompanying drawings and examples, the embodiment to the present invention is described in further detail：
Embodiment one, refer to Fig. 1, in the new networks such as Internet of Things, sensor network, due to communication node body
Product is small, computing capability is low, power limited the problems such as, the problem of large volumes of channels is estimated should not be completed, therefore propose a kind of without carrying out
The wireless key generation method of channel estimation, directly generates key, it is to avoid channel estimation process from signal is received.
The present embodiment offer is a kind of need not to carry out the wireless key generation method of channel estimation, comprise the following steps：
Step S101, legitimate correspondence both sides arrange identical and send signal sequence in advance；
Step S102, legitimate correspondence both sides select antenna and sending method respectively is used for signal transmitting and receiving；
Step S103, legitimate correspondence both sides mutually send previously arranged signal sequence, to being connect on antenna selected in step S102
The signal received is handled, and can use summation process.
The legitimate correspondence both sides mutually send previously arranged signal sequence, the signal sequence using disclosed sequence or
The arbitrary sequence that legitimate correspondence both sides arrange in advance；Legitimate correspondence both sides sent in turn within coherence time previously arranged signal sequence or
Person sends previously arranged signal sequence using co-channel full duplex technology simultaneously.
Step S104, legitimate correspondence both sides carry out sample quantization using same way to the result in step S103,
Generate key sequence；
Step S105, key sequence that legitimate correspondence both sides generate to step S104 carries out uniformity negotiation, remove or
The inconsistent position in both sides' generation key is corrected, consistent key sequence is obtained；
Step S106, legitimate correspondence both sides are amplified to the consistent key sequence obtained in step S105 using secret respectively
Algorithm is handled, and obtains final key；
Step S107, need to such as increase key length or more new key, go to step S101 or step S102 is opened again
Begin above-mentioned flow.
The present invention need not carry out the wireless key generation method of channel estimation, be applicable to following scene：
A. the weaker lightweight communication scene of node signal disposal ability；
B. legitimate correspondence both sides are the scene of single antenna；
C. a side is multiple antennas in legitimate correspondence both sides or both sides are the scene of multiple antennas；
D. point-to-point communication scene；
E. point-to-multipoint delivery, i.e., node or base station centered on sender, with multiple recipient's nodes or use
The star structure wireless communication system at family, including using multiple access sides such as time division multiple acess, frequency division multiple access, space division multiple access, CDMAs
Wireless communication system, Internet of things system, wireless sensor network of formula etc..
In the step S102, legitimate correspondence both sides select antenna respectively is used for signal transmitting and receiving, can use any-mode
Selected antenna, legitimate correspondence both sides need not be identical for the selected mode of antenna, without agreement in advance.
The implementation method of the step S105 is：
Step S105a, legitimate correspondence both sides send key agreement sequence in overt channel, remove or correct both sides' life
Into the inconsistent position in key；
Step S105b, if after once consulting, the key sequence of legitimate correspondence both sides is still inconsistent, repeat step
S105a, until obtaining consistent key sequence.
Embodiment two, refer to Fig. 2, the present embodiment is of the invention in point-to-point communication scene, in legitimate correspondence both sides
One side is under conditions of multiple antennas or both sides are multiple antennas, using receiving the method that signal directly generates key, this method bag
Include following steps：
Step S201, legitimate correspondence both sides appoint the transmission signal sequence for key generation process in advance；
Wherein, cycle longer m-sequence can be used by sending signal sequence, i.e. pseudo-random sequence is used as source signal.
Step S202, legitimate correspondence both sides select antenna and sending method respectively, select all or part of antenna to be used for
Send previously arranged signal sequence；
Step S203, legitimate correspondence both sides send identical previously arranged signal sequence on selected transmission antenna, and obtain
The signal sum received on itself selected antenna；
Step S204, legitimate correspondence both sides carry out sampling quantity to respective reception signal sequence using same way respectively
Change, generate key sequence；
In this step, simple uniform quantization mode can be used, it would however also be possible to employ other quantification manners, but quantization side
Formula is needed known to legitimate correspondence both sides.
Step S205, legitimate correspondence both sides mutually send key agreement sequence, and differing in key is generated to step S204
Cause position to be corrected, obtain consistent key sequence；
Wherein, key agreement can use Cascade algorithms or Winnow algorithms, and other can also be used as needed
Negotiation algorithm.
Step S206, legitimate correspondence both sides are amplified to the consistent key sequence obtained in step S205 using secret respectively
Algorithm is handled, and obtains final key；
Wherein, secret interpolator arithmetic can use the method based on hash function.
Step S207, need to such as increase key length or more new key, can restart above-mentioned flow from step S201,
It can also select to restart above-mentioned flow from step S202.
Embodiment three, refer to Fig. 3, and the scene of embodiment three is similar with implementing two, and now transmitting-receiving two-end is Dan Tian
Line, difference is：
Step S302, legitimate correspondence both sides select signalling formula respectively, for sending previously arranged signal sequence；
Step S303, legitimate correspondence both sides send identical previously arranged signal sequence, and store the letter received on its own antenna
Number.
Repeat step S302 and step S303, until the signal of reception is enough to be used in key generation.
Example IV, refer to Fig. 4, and the present invention directly generates key using receiving signal under point-to-multipoint delivery scene
Method, when there is multi-antenna node in communication node, this method comprises the following steps：
Step S401, Centroid and each recipient's node appoint the transmission signal sequence for key generation process；
Wherein, cycle longer m-sequence can be used by sending signal sequence, i.e. pseudo-random sequence is used as source signal.
Step S402, Centroid and each recipient's node select antenna and sending method, selection whole or portion respectively
Divided antenna is used to send previously arranged signal sequence；
Step S403, Centroid and each recipient's node send identical agreement letter on selected transmission antenna respectively
Number sequence, each recipient's node stores the signal sum received on itself selected antenna, and Centroid is for each reception
Fang Jiedian, stores the signal sum received on itself selected antenna；
Step S404, Centroid and each recipient's node are entered to respective reception signal sequence using same way respectively
Row sample quantization, generates key sequence；
In this step, simple uniform quantization mode can be used, it would however also be possible to employ other quantification manners, but quantization side
Formula is needed known to each node.
Step S405, mutually sends key agreement sequence between Centroid and each recipient's node, step S404 is generated
Inconsistent position in key is corrected, and obtains consistent key sequence；
Wherein, key agreement can use Cascade algorithms or Winnow algorithms, and other can also be used as needed
Negotiation algorithm.
Step S406, Centroid and each recipient's node are adopted to the consistent key sequence obtained in step S405 respectively
Handled with secret interpolator arithmetic, obtain final key；
Wherein, secret interpolator arithmetic uses the method based on hash function.
Step S407, need to such as increase key length or more new key, can restart above-mentioned flow from step S401,
It can also select to restart above-mentioned flow from step S402.
Embodiment five, refer to Fig. 5, and the scene of embodiment five is similar with example IV scene, and difference is, now in
Heart node and each recipient's node are single antenna, and difference is：
Step S502, Centroid and each recipient's node select sending method respectively, for sending previously arranged signal sequence；
Step S503, Centroid and each recipient's node send identical previously arranged signal sequence, each recipient's section respectively
The signal that point storage is received, Centroid is directed to the signal received on each recipient's node, storage antenna.
Repeat step S502, step S503, until the signal of reception is enough to be used in key generation.
The present invention is that one kind avoids carrying out channel estimation, and a kind of lightweight key of key is directly extracted from signal is received
Generation scheme, has advantages below relative to traditional key generation scheme：(1), key generation scheme need not carry out channel
Estimation, reduces key generation expense；(2), key generation scheme directly extracts key, implementation method letter from signal is received
It is single, it is a kind of encryption method of lightweight.
Illustrated above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of need not carry out the wireless key generation method of channel estimation, it is characterised in that comprise the following steps：
Step A, legitimate correspondence both sides arrange identical and send signal sequence in advance；
Step B, legitimate correspondence both sides select antenna and sending method respectively is used for signal transmitting and receiving；
Step C, legitimate correspondence both sides carry out a sample quantization using the same way docking collection of letters number, generate key sequence；
Step D, the key sequence that legitimate correspondence both sides generate to step C carries out uniformity negotiation, removes or correct both sides' life
Into the inconsistent position in key, consistent key sequence is obtained；
Step E, legitimate correspondence both sides are used at secret interpolator arithmetic to the consistent key sequence obtained in step D respectively
Reason, obtains final key.
2. according to claim 1 need not carry out the wireless key generation method of channel estimation, it is characterised in that in step
Also include before C, legitimate correspondence both sides mutually send previously arranged signal sequence, to the letter received on antenna selected in step B
Number handled.
3. according to claim 2 need not carry out the wireless key generation method of channel estimation, it is characterised in that the conjunction
Method communicating pair mutually sends previously arranged signal sequence, and the signal sequence is using disclosed sequence or legitimate correspondence both sides' thing
The arbitrary sequence first arranged；Legitimate correspondence both sides send previously arranged signal sequence or using simultaneously with frequency in turn within coherence time
Full duplex technology sends previously arranged signal sequence.
4. according to claim 1 need not carry out the wireless key generation method of channel estimation, it is characterised in that in step
Also include after E, need to such as increase key length or more new key, go to step A or step B restarts above-mentioned flow.
5. according to claim 1 need not carry out the wireless key generation method of channel estimation, it is characterised in that the nothing
The wireless key generation method that channel estimation need to be carried out is applied to following scene：
A. the weaker lightweight communication scene of node signal disposal ability；
B. legitimate correspondence both sides are the scene of single antenna；
C. a side is multiple antennas in legitimate correspondence both sides or both sides are the scene of multiple antennas；
D. point-to-point communication scene；
E. point-to-multipoint delivery, i.e., node or base station centered on sender, with multiple recipient's nodes or user
Star structure wireless communication system.
6. according to claim 1 need not carry out the wireless key generation method of channel estimation, it is characterised in that described
In step B, legitimate correspondence both sides select antenna respectively is used for signal transmitting and receiving, can select antenna, legitimate correspondence using any-mode
Both sides need not be identical for the selected mode of antenna, without agreement in advance.
7. according to claim 1 need not carry out the wireless key generation method of channel estimation, it is characterised in that the step
Suddenly D implementation method is：
Step D1, legitimate correspondence both sides send key agreement sequence in overt channel, remove or correct both sides' generation key
In inconsistent position；
Step D2, if after once consulting, the key sequence of legitimate correspondence both sides is still inconsistent, repeat step D1, until
To consistent key sequence.
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| CN201710348815.2A CN107257280A (en) | 2017-05-17 | 2017-05-17 | The wireless key generation method of channel estimation need not be carried out |
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| CN108540165A (en) * | 2018-03-07 | 2018-09-14 | 西安电子科技大学 | Single pair idol array element is eliminated in single antenna co-channel full duplex communication simultaneously from the/method mutually interfered |
| CN109246694A (en) * | 2018-10-19 | 2019-01-18 | 中国人民解放军战略支援部队信息工程大学 | A method of wireless key generation is carried out using satellite channel |
| CN111278008A (en) * | 2020-01-13 | 2020-06-12 | 山东大学 | Safety communication method and system for military unmanned aerial vehicle group keyless management center |
| CN111294353A (en) * | 2020-02-04 | 2020-06-16 | 西安交通大学 | IMSI/SUPI physical layer key protection method without channel estimation |
| CN111464299A (en) * | 2020-04-01 | 2020-07-28 | 电子科技大学 | Physical layer key generation method for constructing reciprocal channel parameters based on frequency division duplex mode |
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| CN111464299A (en) * | 2020-04-01 | 2020-07-28 | 电子科技大学 | Physical layer key generation method for constructing reciprocal channel parameters based on frequency division duplex mode |
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