CN104469751A - High-security wireless communication encryption method - Google Patents
High-security wireless communication encryption method Download PDFInfo
- Publication number
- CN104469751A CN104469751A CN201410634947.8A CN201410634947A CN104469751A CN 104469751 A CN104469751 A CN 104469751A CN 201410634947 A CN201410634947 A CN 201410634947A CN 104469751 A CN104469751 A CN 104469751A
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- aes
- encryption
- receiver
- control key
- automobile
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000004891 communication Methods 0.000 title abstract description 4
- 239000011159 matrix material Substances 0.000 claims abstract description 14
- 238000012795 verification Methods 0.000 claims abstract description 6
- 238000012546 transfer Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 8
- 238000005096 rolling process Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 3
- 125000004122 cyclic group Chemical group 0.000 claims description 3
- 239000012634 fragment Substances 0.000 claims description 3
- 238000005336 cracking Methods 0.000 abstract description 2
- 238000004364 calculation method Methods 0.000 abstract 1
- 230000008901 benefit Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- GOLXNESZZPUPJE-UHFFFAOYSA-N spiromesifen Chemical compound CC1=CC(C)=CC(C)=C1C(C(O1)=O)=C(OC(=O)CC(C)(C)C)C11CCCC1 GOLXNESZZPUPJE-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Selective Calling Equipment (AREA)
Abstract
Provided is a high-security wireless communication encryption method. A single encryption channel is adopted. The method sequentially comprises the steps that (1), an AES encryption algorithm is modified; (2) encryption packets integrating secret keys of a complete automobile factory and the AES encryption are integrated into automobile remote control keys and vehicle-mounted receivers; (3) ID segments are intercepted and sent to the vehicle-mounted receivers, and intercepted AES cryptographs are only used for verification; (4) encryption and interception are performed after information passes verification of the vehicle-mounted receivers; (5) the vehicle-mounted receivers verify an interception result, and execute corresponding instructions after the interception result passes the verification. Batches of complete automobiles can not be cracked even though the secrete keys of the complete automobile factory are acquired. The high speed of encryption through hardware is kept, the difficulty of cracking the automobile remote control keys is increased, safety problems caused when the standardization of an AES encryption matrix and an AES decryption matrix highly depends on the safety of private keys of the complete automobile factory and the safety of a private key storage unit in a calculation chip are avoided, and the safety of the automobiles is remarkably improved.
Description
Technical field
The present invention relates to communication encryption, particularly relate to a kind of wireless telecommunications encryption method of high security.
Background technology
The operability of the application safety of automobile remote-control key and the fail safe of car load factory private key, the fail safe of algorithm and crack tool is closely related.Existing battle wagon generally uses the Advanced Encryption Standard (Advanced Encryption Standard, initialism is AES) with high security as the cryptographic means of safety communication between automobile remote-control key and receiver on-board.In view of the feature of automobile industry, generally use the 128bit of minimum of computation unit as capacity expressly, chip companies is corresponding is proposed the hardware computing chip being convenient to rapid computations, so that fast plaintext and ciphertext are transformed, automobile remote-control key end will expressly (initial data) and encryption key in the lump after aes algorithm process, make it become AES ciphertext and be sent to receiver on-board.After receiver on-board end receives AES ciphertext, if the initial data in AES ciphertext will be understood, just use the key of encryption and the algorithm for inversion of identical aes algorithm to be decrypted AES ciphertext, make it revert to readable plaintext.Its flow process as shown in Figure 1.This wireless telecommunications encryption method there is AES encryption matrix and AES deciphers the standardization of matrix, highly relies on the fail safe of car load factory private key, and the problem of the fail safe of the secret key storing unit of computing chip inside, automobile is likely even driven away by unauthorized opening.Crack difficulty for what increase automobile remote-control key, promote the fail safe of automobile, require further improvement the wireless telecommunications encryption method between automobile remote-control key and receiver on-board.
Summary of the invention
Technical problem to be solved by this invention is the defect making up above-mentioned prior art, provides a kind of wireless telecommunications encryption method of high security.
Technical problem of the present invention is solved by the following technical programs.
The wireless telecommunications encryption method of this high security, for the wireless telecommunications between automobile remote-control key end and receiver on-board end.
The feature of the wireless telecommunications encryption method of this high security is:
It is single encrypted tunnel between automobile remote-control key end and receiver on-board end, instead of encrypt/decrypt binary channels, Advanced Encryption Standard (Advanced Encryption Standard, initialism is AES) decryption oprerations need not be carried out, the complexity verified with remarkable simplified design.
There are following steps successively:
1) car load factory issues the encrypted packet of the secret key of integrating whole automobile factory and aes algorithm to part factory, amendment AES encryption algorithm, secondary simple encryption is carried out to the secret key participating in encryption, the AES encryption matrix of employing standard, namely the AES ciphertext be improved under the prerequisite of AES encryption matrix is not being changed, both the high-speed advantage using hardware encipher had been continued, what can increase again automobile remote-control key cracks difficulty, evade because AES encryption matrix and AES decipher the standardization of matrix, highly rely on the fail safe of car load factory private key, and the safety problem that the problem of the fail safe of the inner secret key storing unit of computing chip produces, the fail safe of remarkable lifting automobile,
2) part factory the encrypted packet of secret for integrating whole automobile factory key and aes algorithm is integrated into the automobile remote-control key of every chassis and receiver on-board inner, wherein the ID of every chassis is not identical, and car load ID is only stored in automobile remote-control key and receiver on-board self, crack difficulty with what increase automobile remote-control key further;
3) after each remote control of the automobile remote-control key end of every chassis sends the instruction performing corresponding operating, automobile remote-control key end flow process is conveniently encrypted, intercept and restructuring, only based on the complete ID of automobile remote-control key be 128bit 1/4th namely intercept fragment ID be that 32bit is sent to the receiver on-board end of every chassis by the method for scan matching, and just the AES ciphertext of intercepting is used for checking, instead of traditional whole AES ciphertext 128bit is used for checking, overall transfer expressly only needs 64 bit, for the half of traditional whole AES ciphertext 128bit, to increase efficiency of transmission and to forbid reverse cracking, verify invalid AES ciphertext, then abandon,
4) receiver on-board end is verified front-end information, is encrypted, intercepts after being verified according to the flow process of the routine same with step 3), and the ID wherein intercepted is 8bit, AES ciphertext is 16bit;
5) receiver on-board is verified the result intercepted, and verifies the corresponding instruction of qualified rear execution.
Technical problem of the present invention is solved by following further technical scheme.
The encrypted code of the secondary simple encryption of described step 1) is:
//change the AES Roundkey
tmp3=ENTRY;
RoundKey[0]^=tmp3;
for(idx=1,tmp0=0,tmp1=1;idx<SFNUM;idx++)
{RoundKey[idx%((Nr+1)<<4)]=RoundKey[tmp3++]^RoundKey[tmp++]^(tmp3);
tmp0 %=((Nr+1)<<4)
tmp0 %=((Nr+1)<<4)
tpm3+=41}。
In the overall transfer plaintext of described step 3), instruction 8bit does not encrypt, so that the validity of quick recognition instruction, illegal command then abandons.
In the overall transfer plaintext of described step 3), rolling code 24bit does not encrypt, to identify the validity of rolling code fast, invalid rolling code then abandons.
The overall transfer of described step 3) expressly adopts cyclic redundancy check (CRC) code CRC8 verification, to identify validity expressly fast, invalid plaintext then abandons.
The present invention's beneficial effect is compared with prior art:
The ID of the automobile remote-control key of the inventive method only has subparticipation transmission, even obtain the secret key of car load factory, also cannot crack the car load of batch; And cryptographic algorithm have passed through amendment, secondary simple encryption is carried out to the secret key participating in encryption, can not directly apply mechanically original cryptographic algorithm, both the high-speed advantage using hardware encipher had been continued, what can increase again automobile remote-control key cracks difficulty, evade because AES encryption matrix and AES decipher the standardization of matrix, highly rely on the fail safe of car load factory private key, and the safety problem that the problem of the fail safe of the inner secret key storing unit of computing chip produces, significantly promote the fail safe of automobile.Remainder in AES ciphertext is plain code, be convenient to checking in early stage, reduce the wake-up times of receiver on-board, thus reduction current drain, receiver on-board end need not carry out AES decryption oprerations, but verify after calculating result according to encryption flow, can significantly simplified design checking complexity.
Accompanying drawing explanation
Fig. 1 is the schematic flow sheet adopting the twin-channel existing wireless telecommunications encryption method of encrypt/decrypt;
Fig. 2 is the flow chart of the specific embodiment of the invention adopting single encrypted tunnel.
Embodiment
Contrast accompanying drawing below in conjunction with embodiment the present invention will be described.
A kind of wireless telecommunications encryption method of high security as shown in Figure 2, for the wireless telecommunications between automobile remote-control key end and receiver on-board end, it is single encrypted tunnel between automobile remote-control key end and receiver on-board end, instead of encrypt/decrypt binary channels, need not Advanced Encryption Standard AES decryption oprerations be carried out.
There are following steps successively:
1) car load factory issues the encrypted packet of the secret key of integrating whole automobile factory and aes algorithm to part factory, amendment AES encryption algorithm, secondary simple encryption is carried out to the secret key participating in encryption, adopts the AES encryption matrix of standard, namely do not changing the AES ciphertext be improved under the prerequisite of AES encryption matrix;
The encrypted code of secondary simple encryption is:
//change the AES Roundkey
tmp3=ENTRY;
RoundKey[0]^=tmp3;
for(idx=1,tmp0=0,tmp1=1;idx<SFNUM;idx++)
{RoundKey[idx%((Nr+1)<<4)]=RoundKey[tmp3++]^RoundKey[tmp++]^(tmp3);
tmp0 %=((Nr+1)<<4)
tmp0 %=((Nr+1)<<4)
tpm3+=41}；
2) part factory the encrypted packet of secret for integrating whole automobile factory key and aes algorithm is integrated into the automobile remote-control key of every chassis and receiver on-board inner, wherein the ID of every chassis is not identical, and car load ID is only stored in automobile remote-control key and receiver on-board self;
3) after each remote control of the automobile remote-control key end of every chassis sends the instruction performing corresponding operating, automobile remote-control key end flow process is conveniently encrypted, intercepts and recombinates, only based on the complete ID of automobile remote-control key be 128bit 1/4th namely intercept fragment ID be that 32bit is sent to the receiver on-board end of every chassis by the method for scan matching, and just the AES ciphertext of intercepting is used for checking, instead of traditional whole AES ciphertext 128bit is used for checking, overall transfer expressly only needs 64 bit, is the half of traditional whole AES ciphertext 128bit; In overall transfer plaintext, instruction 8bit does not encrypt.So that quick recognition instruction validity, invalid, abandon; In overall transfer plaintext, rolling code 24bit does not encrypt, so that identify the validity of rolling code fast, invalid, abandons; Overall transfer expressly adopts cyclic redundancy check (CRC) code CRC8 verification, so that the validity of quick identification data, invalid, abandons;
4) receiver on-board end is verified front-end information, is encrypted, intercepts after being verified according to the flow process of the routine same with step 3), and the ID wherein intercepted is 8bit, AES ciphertext is 16bit;
5) receiver on-board is verified the result intercepted, and verifies the corresponding instruction of qualified rear execution.
Above content is in conjunction with concrete preferred implementation further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention; make some equivalent alternative or obvious modification without departing from the inventive concept of the premise; and performance or purposes identical, all should be considered as belonging to the scope of patent protection that the present invention is determined by submitted to claims.
Claims (5)
1. a wireless telecommunications encryption method for high security, for the wireless telecommunications between automobile remote-control key end and receiver on-board end, is characterized in that:
Be single encrypted tunnel between automobile remote-control key end and receiver on-board end, instead of encrypt/decrypt binary channels, need not Advanced Encryption Standard AES decryption oprerations be carried out;
There are following steps successively:
1) car load factory issues the encrypted packet of the secret key of integrating whole automobile factory and aes algorithm to part factory, amendment AES encryption algorithm, secondary simple encryption is carried out to the secret key participating in encryption, adopts the AES encryption matrix of standard, namely do not changing the AES ciphertext be improved under the prerequisite of AES encryption matrix;
2) part factory the encrypted packet of secret for integrating whole automobile factory key and aes algorithm is integrated into the automobile remote-control key of every chassis and receiver on-board inner, wherein the ID of every chassis is not identical, and car load ID is only stored in automobile remote-control key and receiver on-board self;
3) after each remote control of the automobile remote-control key end of every chassis sends the instruction performing corresponding operating, automobile remote-control key end flow process is conveniently encrypted, intercepts and recombinates, only based on the complete ID of automobile remote-control key be 128bit 1/4th namely intercept fragment ID be that 32bit is sent to the receiver on-board end of every chassis by the method for scan matching, and just the AES ciphertext of intercepting is used for checking, instead of traditional whole AES ciphertext 128bit is used for checking, overall transfer expressly only needs 64 bit, is the half of traditional whole AES ciphertext 128bit;
4) receiver on-board end is verified front-end information, is encrypted, intercepts after being verified according to the flow process of the routine same with step 3), and the ID wherein intercepted is 8bit, AES ciphertext is 16bit;
5) receiver on-board is verified the result intercepted, and verifies the corresponding instruction of qualified rear execution.
2. the wireless telecommunications encryption method of high security as claimed in claim 1, is characterized in that:
The encrypted code of the secondary simple encryption of described step 1) is:
//change the AES Roundkey
tmp3=ENTRY;
RoundKey[0]^=tmp3;
for(idx=1,tmp0=0,tmp1=1;idx<SFNUM;idx++)
{RoundKey[idx%((Nr+1)<<4)]=RoundKey[tmp3++]^RoundKey[tmp++]^(tmp3);
tmp0 %=((Nr+1)<<4)
tmp0 %=((Nr+1)<<4)
tpm3+=41}。
3. the wireless telecommunications encryption method of high security as claimed in claim 1 or 2, is characterized in that:
In the overall transfer plaintext of described step 3), instruction 8bit does not encrypt.
4. the wireless telecommunications encryption method of high security as claimed in claim 1 or 2, is characterized in that:
In the overall transfer plaintext of described step 3), rolling code 24bit does not encrypt.
5. the wireless telecommunications encryption method of high security as claimed in claim 1 or 2, is characterized in that:
The overall transfer of described step 3) expressly adopts cyclic redundancy check (CRC) code CRC8 verification.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410634947.8A CN104469751A (en) | 2014-11-13 | 2014-11-13 | High-security wireless communication encryption method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410634947.8A CN104469751A (en) | 2014-11-13 | 2014-11-13 | High-security wireless communication encryption method |
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| CN104469751A true CN104469751A (en) | 2015-03-25 |
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| CN201410634947.8A Pending CN104469751A (en) | 2014-11-13 | 2014-11-13 | High-security wireless communication encryption method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752996A (en) * | 2004-09-24 | 2006-03-29 | 比亚迪股份有限公司 | Identity recognition system for keyless entering automobile and its recognition method |
| CN101866534A (en) * | 2010-01-29 | 2010-10-20 | 中南大学 | Automobile remote-control key-free door control identity authentication method |
| CN103422737A (en) * | 2012-05-23 | 2013-12-04 | 重庆长安汽车股份有限公司 | Automobile central locking remote control method based on rolling codes |
-
2014
- 2014-11-13 CN CN201410634947.8A patent/CN104469751A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1752996A (en) * | 2004-09-24 | 2006-03-29 | 比亚迪股份有限公司 | Identity recognition system for keyless entering automobile and its recognition method |
| CN101866534A (en) * | 2010-01-29 | 2010-10-20 | 中南大学 | Automobile remote-control key-free door control identity authentication method |
| CN103422737A (en) * | 2012-05-23 | 2013-12-04 | 重庆长安汽车股份有限公司 | Automobile central locking remote control method based on rolling codes |
Non-Patent Citations (2)
| Title |
|---|
| 谷聚辉: "基于改进型AES算法汽车门禁系统的研究", 《湖南环境生物职业技术学院学报》 * |
| 黄友等: "基于AES算法的滚码技术在汽车防盗系统中的应用", 《计算机工程与科学》 * |
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Application publication date: 20150325 |
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