CN110278079A - High security LoRa communication means and system based on dynamic chaos encryption - Google Patents
High security LoRa communication means and system based on dynamic chaos encryption Download PDFInfo
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- CN110278079A CN110278079A CN201910590734.2A CN201910590734A CN110278079A CN 110278079 A CN110278079 A CN 110278079A CN 201910590734 A CN201910590734 A CN 201910590734A CN 110278079 A CN110278079 A CN 110278079A
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- 238000004891 communication Methods 0.000 title claims abstract description 38
- 238000000034 method Methods 0.000 claims abstract description 31
- 230000000739 chaotic effect Effects 0.000 claims abstract description 14
- 238000013507 mapping Methods 0.000 claims description 6
- 230000002123 temporal effect Effects 0.000 claims description 6
- 238000011002 quantification Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims 3
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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
- H04L9/001—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols using chaotic signals
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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
- H04L9/0872—Generation of secret information including derivation or calculation of cryptographic keys or passwords using geo-location information, e.g. location data, time, relative position or proximity to other entities
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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]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/03—Protecting confidentiality, e.g. by encryption
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- 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]
- H04W12/041—Key generation or derivation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/60—Context-dependent security
- H04W12/61—Time-dependent
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W12/00—Security arrangements; Authentication; Protecting privacy or anonymity
- H04W12/60—Context-dependent security
- H04W12/63—Location-dependent; Proximity-dependent
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L2209/00—Additional information or applications relating to cryptographic mechanisms or cryptographic arrangements for secret or secure communication H04L9/00
- H04L2209/80—Wireless
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
High security LoRa communication means and system provided by the invention based on dynamic chaos encryption, passes through positioning unit dynamic acquisition time and geographical location information；Time and geographical location information generation chaotic binary sequences are based on using microprocessor and are encrypted according to chaotic binary sequences to sent data load, and encryption message is generated；Encryption message is communicated finally by LoRa radio frequency unit.A kind of high security LoRa communication means and system based on dynamic chaos encryption provided by the invention, using microprocessor as chaos generator, the variable chaotic binary sequences of length are dynamically generated using the time of GPS positioning unit acquisition, geographical location information, data load to be sent is encrypted or is decrypted, to realize safe wireless information transfer；And the chaotic binary sequences generated every time are all different, and introduce dynamic characteristic for encryption/decryption processes, to be effective against the replay attack of eavesdropping node.
Description
Technical field
The present invention relates to Internet of Things wireless communication technology field, more particularly to a kind of based on dynamic chaos encryption
High security LoRa communication means further relates to a kind of high security LoRa communication system of dynamic chaos encryption.
Background technique
LoRa is a kind of low-power consumption wan communication technology.Its cost is lower, signal cover is wider, with higher
Cost performance, to become a kind of very attractive IoT communication scheme.In LoRa-IoT communication scenes, due to nothing
The broadcast characteristic of line channel, LoRa signal are subject to eavesdrop.As shown in Figure 1, in the communication scenes that there is eavesdropping node, when
LoRa-IoT node to base station send upstream data (the usually collected environmental information of sensor) when, be positioned over range it
Interior eavesdropping node and the base station LoRa can receive LoRa signal.Since LoRaWAN standard discloses, eavesdropping node is easy to
It obtains the information of LoRa-IoT node transmission, carry out replay attack, to reduce security of system, bring certain safety hidden
Suffer from.
In order to enhance system security, the prior art is mainly waited for by way of software cryptography in LoRa-IoT node encrytion
Send data, i.e., based on the Encryption Algorithm being locally stored LoRa-IoT node microprocessor unit (Micro Control
Unit, MCU) encryption data to be sent, encryption data is sent by LoRa radio frequency unit.Even if listener-in obtains encryption data,
It is difficult to quickly decode, obtains the information sent.But static ciphering process is easy to be tracked, crack, and can not be effective against
Replay attack.Particularly, in replay attack, eavesdropping node replays the historical signal received, and the base station LoRa can be recognized
It is received for legal signal, in turn results in mistake.
Summary of the invention
The present invention is to overcome existing LoRa communication system to exist in static ciphering process be easy to be tracked, crack,
It is not highly resistant to the technological deficiency of replay attack, a kind of high security LoRa communication system based on dynamic chaos encryption is provided
System.
The present invention also provides a kind of high security LoRa communication systems of dynamic chaos encryption.
In order to solve the above technical problems, technical scheme is as follows:
High security LoRa communication means based on dynamic chaos encryption, comprising the following steps:
S1: dynamic acquisition time and geographical location information；
S2: chaotic binary sequences are generated based on time and geographical location information；
S3: being encrypted according to chaotic binary sequences to sent data load, and encryption message is generated；
S4: it is communicated using encryption message.
Wherein, the detailed process of the step S2 are as follows:
S21: the DevEUI sequence of geographical location information and LoRa-IoT node when the last time is sent is fed together mixed
Two-value quantification treatment is carried out in ignorant generator, obtains the first chaos sequence；
S22: currently transmitted temporal information and the first chaos sequence are fed together chaos generator and carried out at binaryzation
Reason, obtains the second chaos sequence；
S23: being encrypted using the second chaos sequence to sent data load, and encryption message is generated.
Wherein, the detailed process of the step S21 are as follows:
S211: the geographical location information when last time is sent is converted into the decimal that a value range is [0,1], is denoted as
X, the initial value as chaos generator；
S212: the code of LoRa-IoT node DevEUI sequence is denoted as l again1, for indicating the length of chaos sequence to be generated
Degree；
S213: chaos generator is based on logistics mapping and generates length to be l1SequenceAnd binaryzation is carried out to it
Processing generates the first chaos sequence, is denoted as
Wherein, the detailed process of the step S22 are as follows:
S221: the decimal that a value range is [0,1] is converted by currently transmitted temporal information, y is denoted as, as mixed
The initial value of ignorant generator；
S222: the code of the first chaos sequence is denoted as l again2, for indicating the length of chaos sequence to be generated；
S223: chaos generator is based on logistics mapping and generates length to be l2SequenceAnd binaryzation is carried out to it
Processing generates the second chaos sequence, is denoted as
Wherein, the detailed process of the step S23 are as follows:
S231: " 1 " code is mended at data load binary sequence end to be sent, being extended to length is l2Integer
Times；
S232: by every l2The unit of bit length is denoted asRespectively with the second chaos sequenceXor operation is carried out, generates and adds
Close sequence
Wherein, the data load to be sent includes sensor information and currently transmitted geographical location information.
Wherein, the currently transmitted geographical location information is for decrypting the information sent next time.
High security LoRa communication system based on dynamic chaos encryption includes sensor module, encrypting module and reception mould
Block；Wherein:
The encrypting module includes microprocessor, positioning unit, LoRa radio frequency unit；The positioning unit and micro- place
Device input terminal is managed to be electrically connected；The LoRa radio frequency unit and the output end of microprocessor are electrically connected；
The sensor module and the microprocessor input are electrically connected；
The receiving module and LoRa radio frequency unit wireless communication connect.
Wherein, the microprocessor uses but is not limited only to STM32F4072GT6 microprocessor.
Wherein, the positioning unit uses GPS positioning unit.
In above scheme, dynamically acquisition time and geographical location information be simultaneously for controlling GPS positioning unit for microprocessor
Based on time and geographical location information dynamic generation chaotic binary sequences, is encrypted or is decrypted to sent data load,
And it controls LoRa radio frequency unit and is transmitted wirelessly or received；GPS positioning unit is used for acquisition time and geographical location information；
LoRa radio frequency unit is used for wireless transmission or reception to data load.
In above scheme, microprocessor is connect by UART interface with GPS positioning unit, is penetrated by SPI interface and LoRa
The connection of frequency unit, LoRa communication system provide but are not limited only to SPI interface and connect with external module.
Compared with prior art, the beneficial effect of technical solution of the present invention is:
A kind of high security LoRa communication means and system based on dynamic chaos encryption provided by the invention, by micro process
For device as chaos generator, time for being obtained using GPS positioning unit, geographical location information are dynamically generated variable mixed of length
Ignorant binary sequence, data load to be sent are encrypted or are decrypted, to realize safe wireless information transfer；And per secondary
At chaotic binary sequences be all different, dynamic characteristic is introduced for encryption/decryption processes, to be effective against eavesdropping node
Replay attack.Due to the common features of GPS time, additional signaling or synchronization signal are not needed between receiving module with generate with
The same chaotic binary sequences of transmitting terminal.
Detailed description of the invention
Fig. 1 is the LoRa-IoT communication scenes schematic diagram in the presence of eavesdropping node；
Fig. 2 is the flow diagram of the high security LoRa communication means encrypted based on dynamic chaos；
Fig. 3 is the flow diagram of dynamic chaos encryption；
Fig. 4 is the high security LoRa communication system connection schematic diagram encrypted based on dynamic chaos；
Fig. 5 is the flow diagram of dynamic chaos decryption；
Wherein: 1, sensor module；2, encrypting module；21, microprocessor；22, positioning unit；23, LoRa radio frequency unit；
3, receiving module.
Specific embodiment
The attached figures are only used for illustrative purposes and cannot be understood as limitating the patent；
In order to better illustrate this embodiment, the certain components of attached drawing have omission, zoom in or out, and do not represent actual product
Size；
To those skilled in the art, it is to be understood that certain known features and its explanation, which may be omitted, in attached drawing
's.
The following further describes the technical solution of the present invention with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Fig. 2, the high security LoRa communication means based on dynamic chaos encryption, comprising the following steps:
S1: dynamic acquisition time and geographical location information；
S2: chaotic binary sequences are generated based on time and geographical location information；
S3: being encrypted according to chaotic binary sequences to sent data load, and encryption message is generated；
S4: it is communicated using encryption message.
More specifically, as shown in figure 3, the detailed process of the step S2 are as follows:
S21: the DevEUI sequence of geographical location information and LoRa-IoT node when the last time is sent is fed together mixed
Two-value quantification treatment is carried out in ignorant generator, obtains the first chaos sequence；
S22: currently transmitted temporal information and the first chaos sequence are fed together chaos generator and carried out at binaryzation
Reason, obtains the second chaos sequence；
S23: being encrypted using the second chaos sequence to sent data load, and encryption message is generated.
More specifically, the detailed process of the step S21 are as follows:
S211: the geographical location information when last time is sent is converted into the decimal that a value range is [0,1], is denoted as
X, the initial value as chaos generator；
S212: the code of LoRa-IoT node DevEUI sequence is denoted as l again1, for indicating the length of chaos sequence to be generated
Degree；
S213: chaos generator is based on logistics mapping and generates length to be l1SequenceAnd binaryzation is carried out to it
Processing generates the first chaos sequence, is denoted as
In the specific implementation process, by taking north latitude east longitude area as an example, the data format of GPS geographical location information is
" Naabb.mmmm, Ecccdd.nnnn " indicate to set positioned at north latitude aa degree bb.mmmm points, east longitude ccc degree dd.nnnn quartile, then x
Generating mode be
More specifically, the detailed process of the step S22 are as follows:
S221: the decimal that a value range is [0,1] is converted by currently transmitted temporal information, y is denoted as, as mixed
The initial value of ignorant generator；
S222: the code of the first chaos sequence is denoted as l again2, for indicating the length of chaos sequence to be generated；
S223: chaos generator is based on logistics mapping and generates length to be l2SequenceAnd it is carried out at binaryzation
Reason generates the second chaos sequence, is denoted as
In the specific implementation process, by taking north latitude east longitude area as an example, the data format of GPS time information is
" hhmmss.eee " indicates that mm divides ss.eee seconds when UTC time hh, then the generating mode of y is
More specifically, the detailed process of the step S23 are as follows:
S231: " 1 " code is mended at data load binary sequence end to be sent, being extended to length is l2Integer
Times；
S232: by every l2The unit of bit length is denoted asRespectively with the second chaos sequenceXor operation is carried out, generates and adds
Close sequence
More specifically, the data load to be sent includes sensor information and currently transmitted geographical location letter
Breath.
More specifically, the currently transmitted geographical location information is for encrypting the information sent next time.
Embodiment 2
More specifically, on the basis of embodiment 1, as shown in figure 4, the high security LoRa based on dynamic chaos encryption is logical
Letter system includes sensor module 1, encrypting module 2 and receiving module 3；Wherein:
The encrypting module 2 includes microprocessor 21, positioning unit 22, LoRa radio frequency unit 23；The positioning unit 22
It is electrically connected with 21 input terminal of microprocessor；The LoRa radio frequency unit 23 electrically connects with 21 output end of microprocessor
It connects；
The sensor module 1 is electrically connected with 21 input terminal of microprocessor；
The receiving module 3 is connected with the LoRa radio frequency unit 23 wireless communication.
More specifically, the microprocessor 21 uses but is not limited only to STM32F4072GT6 microprocessor.
More specifically, the positioning unit 22 uses GPS positioning unit.
In the specific implementation process, microprocessor 21 is for controlling GPS positioning unit 22 dynamically acquisition time and geography
Location information is simultaneously based on time and geographical location information dynamic generation chaotic binary sequences, is added to sent data load
Close or decryption, and control LoRa radio frequency unit 23 and transmitted wirelessly or received；GPS positioning unit 22 is used for acquisition time and ground
Manage location information；LoRa radio frequency unit 23 is used for wireless transmission or reception to data load.
In the specific implementation process, microprocessor 21 is connect by UART interface with GPS positioning unit 22, is connect by SPI
Mouth is connect with LoRa radio frequency unit 23, and LoRa communication system provides but is not limited only to SPI interface and connect with external module.
In the specific implementation process, as the external MCU of system, the microprocessor 21 of internal system is then equivalent to an encryption
Chip carries out dynamic chaos encryption to the data load chosen；When not meeting MCU, the microprocessor 21 of internal system in addition to
The data load chosen is carried out outside dynamically chaos encryption, the function that control sensor will be had both, read sensor signal.
Embodiment 3
More specifically, the decryption method of a kind of method of corresponding dynamic chaos encryption is provided as shown in Figure 5, and decryption mechanisms are same
Sample is completed by microprocessor 21.Decrypting process needs current GPS time information and the last geographical location GPS received
Information；GPS time information controls GPS positioning unit 22 by microprocessor 21 and obtains, and receiving module 3 is each by searching for being stored in
The GPS geographical location information of LoRa radio frequency unit 23, when receiving each time, receiving module 3 is true in such a way that syringe needle detects
Corresponding 23 identity of LoRa radio frequency unit is received before settled, is taken out when LoRa radio frequency unit 23 is last to be sent from look-up table
GPS geographical location information.
More specifically, the LoRa radio frequency unit 23 can be used as transmitting terminal, can also be used as receiving end, i.e. LoRa radio frequency list
Member 23 can replace receiving module 3 to be applied in system.
In the specific implementation process, the specific steps of dynamic chaos decryption are as follows:
The GPS geographical location information and sending node that last time is received, i.e. the DevEUI sequence of LoRa radio frequency unit 23
Column are fed together progress two-value quantification treatment in chaos generator, obtain third chaos sequence；Wherein, it is same send, connect
During sending, the first chaos sequence, the third chaos sequence of generation are identical；
The GPS time information being currently received and third chaos sequence are inputted to chaos generator and are carried out at binaryzation
Reason generates the 4th chaos sequence；Wherein, for sending and receiving the difference of initial time, by adjusting the first chaos of generation
Used GPS event information precision is overcome during sequence and third chaos sequence, so that the corresponding same hair
It send, receive process, the second chaos sequence and the 4th chaos sequence of generation；Remember that the 4th chaos sequence isThe length is l4, then
Corresponding transmitting-receiving process hasAnd l4=l2；
For the encryption message received, for every l4The unit of bit length, is denoted asN is positive integer, respectively withInto
Row xor operation, can be obtained decrypted sequences
In the specific implementation process, it has been decrypted in decrypted sequences comprising sensor information and the GPS information being currently received
At before, the corresponding GPS geographical location information of current system is updated in a lookup table, is used in decryption next time.
In the specific implementation process, when the high security LoRa communication system based on dynamic chaos encryption is communicated, often
The chaos encryption sequence used when primary transmission is all different, and chaos sequence has pseudo-random characteristics, then LoRa-IoT is saved
Communication between point can be reasonably resistant to replay attack and violence decryption, to promote the security feature of IoT system.Also,
System is that software cryptography introduces dynamic characteristic using hardware configuration unit, and complexity is lower, is suitble to IoT system.
Obviously, the above embodiment of the present invention be only to clearly illustrate example of the present invention, and not be pair
The restriction of embodiments of the present invention.For those of ordinary skill in the art, may be used also on the basis of the above description
To make other variations or changes in different ways.There is no necessity and possibility to exhaust all the enbodiments.It is all this
Made any modifications, equivalent replacements, and improvements etc., should be included in the claims in the present invention within the spirit and principle of invention
Protection scope within.
Claims (10)
1. the high security LoRa communication means based on dynamic chaos encryption, which comprises the following steps:
S1: dynamic acquisition time and geographical location information；
S2: chaotic binary sequences are generated based on time and geographical location information；
S3: being encrypted according to chaotic binary sequences to sent data load, and encryption message is generated；
S4: it is communicated using encryption message.
2. the high security LoRa communication means according to claim 1 based on dynamic chaos encryption, which is characterized in that institute
State the detailed process of step S2 are as follows:
S21: the DevEUI sequence of geographical location information and LoRa-IoT node when the last time is sent is fed together chaos hair
Two-value quantification treatment is carried out in raw device, obtains the first chaos sequence；
S22: currently transmitted temporal information and the first chaos sequence are fed together chaos generator and carry out binary conversion treatment, is obtained
To the second chaos sequence；
S23: being encrypted using the second chaos sequence to sent data load, and encryption message is generated.
3. the high security LoRa communication means according to claim 2 based on dynamic chaos encryption, it is characterised in that: institute
State the detailed process of step S21 are as follows:
S211: the geographical location information when last time is sent is converted into the decimal that a value range is [0,1], is denoted as x, makees
For the initial value of chaos generator；
S212: the code of LoRa-IoT node DevEUI sequence is denoted as l again1, for indicating the length of chaos sequence to be generated；
S213: chaos generator is based on logistics mapping and generates length to be l1SequenceAnd binary conversion treatment is carried out to it,
The first chaos sequence is generated, is denoted as
4. the high security LoRa communication means according to claim 3 based on dynamic chaos encryption, it is characterised in that: institute
State the detailed process of step S22 are as follows:
S221: the decimal that a value range is [0,1] is converted by currently transmitted temporal information, y is denoted as, is sent out as chaos
The initial value of raw device；
S222: the code of the first chaos sequence is denoted as l again2, for indicating the length of chaos sequence to be generated；
S223: chaos generator is based on logistics mapping and generates length to be l2SequenceAnd binary conversion treatment is carried out to it,
The second chaos sequence is generated, is denoted as
5. the high security LoRa communication means according to claim 4 based on dynamic chaos encryption, it is characterised in that: institute
State the detailed process of step S23 are as follows:
S231: " 1 " code is mended at data load binary sequence end to be sent, being extended to length is l2Integral multiple；
S232: by every l2The unit of bit length is denoted asRespectively with the second chaos sequenceXor operation is carried out, encryption sequence is generated
Column
6. described in any item high security LoRa communication means based on dynamic chaos encryption according to claim 1~5, special
Sign is: the data load to be sent includes sensor information and currently transmitted geographical location information.
7. the high security LoRa communication means according to claim 6 based on dynamic chaos encryption, it is characterised in that: institute
Currently transmitted geographical location information is stated for decrypting the information sent next time.
8. the high security LoRa communication system based on dynamic chaos encryption, it is characterised in that: including sensor module (1), add
Close module (2) and receiving module (3)；Wherein:
The encrypting module (2) includes microprocessor (21), positioning unit (22), LoRa radio frequency unit (23)；The positioning is single
First (22) and the microprocessor (21) input terminal are electrically connected；The LoRa radio frequency unit (23) and the microprocessor (21)
Output end is electrically connected；
The sensor module (1) and the microprocessor (21) input terminal are electrically connected；
The receiving module (3) and the LoRa radio frequency unit (23) wireless communication connect.
9. the high security LoRa communication system according to claim 8 based on dynamic chaos encryption, it is characterised in that: institute
Microprocessor (21) are stated to use but be not limited only to STM32F4072GT6 microprocessor.
10. the high security LoRa communication system according to claim 9 based on dynamic chaos encryption, it is characterised in that:
The positioning unit (22) uses GPS positioning unit.
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| CN116321133A (en) * | 2023-05-11 | 2023-06-23 | 西安星恒通智能装备有限公司 | Multi-antenna cooperation processing method and system |
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