CN102722668A - Wireless safety computer lock and using method thereof - Google Patents
Wireless safety computer lock and using method thereof Download PDFInfo
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- CN102722668A CN102722668A CN201210167244XA CN201210167244A CN102722668A CN 102722668 A CN102722668 A CN 102722668A CN 201210167244X A CN201210167244X A CN 201210167244XA CN 201210167244 A CN201210167244 A CN 201210167244A CN 102722668 A CN102722668 A CN 102722668A
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Abstract
The invention discloses a wireless safety computer lock. The wireless safety computer lock comprises a computer lock and a key which are matched with each other. The computer lock comprises a universal series bus (USB) interface, a microprocessor, a wireless radio frequency transceiving module and a buzzer used for giving an alarm, wherein the USB interface is connected with a computer. The key comprises a USB interface, a microprocessor, a wireless radio frequency transceiving module, a power supply management chip and a chargeable lithium battery, wherein the lithium battery is charged through the USB interface and the power supply management chip; safe radio frequency communication of a frame transmission protocol encrypted on the basis of an advanced encryption standard (AES) is realized between the computer lock and the key; and the microprocessors of the computer lock and the key comprise a storage area respectively, wherein each storage area stores a unique corresponding identification number. The invention also discloses a using method for the wireless safety computer lock. Due to the adoption of the AES encryption and the wireless radio frequency transceiving modules, reliable and safe short-range wireless communication can be realized by the wireless safety computer lock.
Description
Technical field
The present invention relates to a kind of equipment that is applied to computer security, be specifically related to a kind of wireless security computer lock and method of application thereof.
Background technology
Along with the universalness of computer, the user has higher requirement for the secret peep-proof of data in the computer and information.
Carry the inconvenience that screen saver function needs the artificial release of locking in order to overcome computer, the user can use computer lock protection computer privacy.At present, known wireless computer lock comprises interface circuit, wireless launcher, wireless receiver.It realizes that through USB interface computer automatically locks when the user leaves computer; When the user gets back to the computer side, the computer automatic unlocking.But there is huge hidden danger in the communication security that such computer is locked between wireless launcher and the wireless receiver, and system is prone to utilized the mode of man-in-the-middle attack or Replay Attack to break through by the undesirable.
Summary of the invention
The objective of the invention is to solve the COMSEC insecurity that the existing radio brain is latched in, a kind of wireless security computer lock based on the AES encryption technology is provided.
Another object of the present invention is to provide a kind of method of application of wireless security computer lock.
The technical scheme that the present invention adopts is: a kind of wireless security computer lock comprises a pair of matching used computer lock & key;
Said computer lock comprises a USB interface, microprocessor, radio frequency transceiving module, the hummer that is used to report to the police, and said USB interface is connected with computer;
Said key comprises a USB interface, microprocessor, radio frequency transceiving module, power management chip, a chargeable lithium cell, and said lithium battery is through USB interface and power management chip charging;
Realization is based on the radio communication of the safety of the frame host-host protocol of AES encryption between the said computer lock & key;
The microprocessor of said computer lock & key comprises a memory block respectively, and said storage area stores has unique corresponding identifier.
As preferably, said computer lock adopts wildcard, and the key box is stored in said memory block, and computer lock system is encrypted the picked at random key at every turn.
Computer lock & key among the present invention communicates through a cover complete safe agreement.Wherein computer is locked the unique frame that produces in the microprocessor is sent to key through AES encryption back through radio frequency transceiving module, and key is also deciphered this frame decoding through radio frequency transceiving module.After key carries out unique modification through microprocessor to this frame, encrypt and the feedback to the computer lock.
A kind of method of using above-mentioned wireless security computer lock may further comprise the steps:
1) microcontroller of computer lock produces and sends to key through radio frequency transceiving module after unique frame is encrypted through AES, and said frame comprises computer and locks unique identifier;
2) microcontroller of key judges whether radio frequency transceiving module correctly receives the radiofrequency signal that the computer lock sends;
3) key carries out the AES deciphering and judges whether the computer lock identifier in the received frame matees, and in this way, the computer lock identifier of replacing in the former frame is the unique identifier of key, is transmitted to the computer lock through radio frequency transceiving module, otherwise, not operation;
4) microcontroller of computer lock judges whether radio frequency transceiving module correctly receives the radiofrequency signal that key sends;
5) whether computer lock carries out the AES deciphering and judges whether key identifier in the received frame matees and receives signal intensity meeting the requirements, in this way, and to computer transmission unlock command, otherwise, to computer transmission lock command.
As preferably, above-mentioned steps 5) order that the computer lock core chip sends to computer in adopts the mode of md5 authentication sign indicating number to carry out message authentication.
Beneficial effect:The present invention is owing to adopted AES to encrypt and radio frequency transceiving module, and it can accomplish reliable safe short-distance wireless communication.In addition, the USB interface and the power management chip of key employing can be its battery charge easily.Therefore, the present invention is easy to carry and use.
Description of drawings
Fig. 1 is a structured flowchart of the present invention;
Fig. 2 is a computer latching segment process flow diagram of the present invention;
Fig. 3 is a key part process flow diagram of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
As shown in Figure 1, a kind of wireless security computer lock, it comprises a pair of matching used computer lock 1 and key 2, wherein said computer lock 1 comprises a usb 11, microprocessor 12, radio frequency transceiving module 13, the hummer 14 that is used to report to the police; Said key 2 comprises a USB interface 21, microprocessor 22, radio frequency transceiving module 23, power management chip 24, a chargeable lithium cell 25.Computer lock 1 passes through the twireless radio-frequency communication mode with key 2.Computer lock 1 is connected with computer through usb 14, sends locking or unlock command to computer.After said key left said computer lock certain distance, the computer lock sent lock command to computer, made computer get into screen protection, closed the mouse-keyboard operation, forbidding USB drives, and computer lock hummer 14 is reported to the police simultaneously; When the distance of said key and said computer lock was in coverage, the computer lock sent unlock command to computer, makes computer recover normal operating condition.After the computer lock was extracted unusually, computer also can get into lock-out state automatically, until receiving the unlock command that the computer lock sends.
In the present embodiment, said computer lock & key all adopts the CC1111 on-chip system chip of TI company, this chip is integrated microprocessor, radio frequency transceiving module, USB control module, AES hardware enciphering and deciphering module and flash memory.Because the Highgrade integration of on-chip system chip, the volume of said computer lock & key is less than common U disk.The frequency of wireless transmit and reception is 434MHz.The computer lock is connected with computer through USB interface, is supplied power by computer USB.Key is carried, and by a 320mAh chargeable lithium cell power supply, lithium battery can be through USB interface and power management chip MAX1555 charging.Corresponding paired device identifier of computer lock & key on-chip system chip flash memory stored and the required key box of AES encryption and decryption.
The workflow of radio frequency computer lock is following, referring to Fig. 2, Fig. 3, is respectively computer latching segment of the present invention and key part process flow diagram.At first; What the microcontroller of computer lock produced sends to key through AES hardware encipher device encrypted data packet through radio frequency transceiving module, and said packet comprises the ciphertext (identifier of 4 bytes that the computer lock after promptly encrypting the is unique and random number of 12 bytes) of 16 bytes and the random number plain text of 1 byte.The radio frequency transceiving module of key receives packet then.The microcontroller of key is confirmed key according to the random number plain text in the receipts packet; And ciphertext is passed through AES hardware decryption device decipher; Judge in the received frame computer lock identifier whether with the key flash memory in the pairing identifier coupling of being deposited; In this way, the computer lock identifier of replacing in the former frame is this key identifier, carries out again being transmitted to the computer lock through radio frequency transceiving module after AES encrypts; Otherwise, not operation.Key is in the PM2 dormant state when not having the signal of reception.The microcontroller of computer lock is confirmed key according to the random number plain text in the receipts packet; And ciphertext is passed through AES hardware decryption device decipher; Judge in the received frame the key identifier whether with computer lock flash memory internal memory in the random number of the institute's key identifier of depositing coupling, 12 bytes whether correct and receive signal intensity and whether meet the setting requirement, in this way, to computer transmission unlock command; Otherwise, send lock command to computer.The microprocessor of key sends order through USB interface to computer, and said order is the md5 encryption sign indicating number of lock identifier, locking/unlocking identifier, counter.
Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also make some improvement and retouching, these improvement and retouching also should be regarded as protection scope of the present invention.The all available prior art of each ingredient not clear and definite in the present embodiment realizes.
Claims (4)
1. a wireless security computer lock is characterized in that: comprise a pair of matching used computer lock & key;
Said computer lock comprises a USB interface, microprocessor, radio frequency transceiving module, the hummer that is used to report to the police, and said USB interface is connected with computer;
Said key comprises a USB interface, microprocessor, radio frequency transceiving module, power management chip, a chargeable lithium cell, and said lithium battery is through USB interface and power management chip charging;
Realization is based on the radio communication of the safety of the frame host-host protocol of AES encryption between the said computer lock & key;
The microprocessor of said computer lock & key comprises a memory block respectively, and said storage area stores has unique corresponding identifier.
2. a kind of wireless security computer lock according to claim 1 is characterized in that: said computer lock adopts wildcard, and the key box is stored in said memory block, and computer lock system is encrypted the picked at random key at every turn.
3. method of using the wireless security computer lock of said claim 1 is characterized in that: may further comprise the steps:
1) microcontroller of computer lock produces and sends to key through radio frequency transceiving module after unique frame is encrypted through AES, and said frame comprises computer and locks unique identifier;
2) microcontroller of key judges whether radio frequency transceiving module correctly receives the radiofrequency signal that the computer lock sends;
3) key carries out the AES deciphering and judges whether the computer lock identifier in the received frame matees, and in this way, the computer lock identifier of replacing in the former frame is the unique identifier of key, is transmitted to the computer lock through radio frequency transceiving module, otherwise, not operation;
4) microcontroller of computer lock judges whether radio frequency transceiving module correctly receives the radiofrequency signal that key sends;
5) whether computer lock carries out the AES deciphering and judges whether key identifier in the received frame matees and receives signal intensity meeting the requirements, in this way, and to computer transmission unlock command, otherwise, to computer transmission lock command.
4. the method for wireless security computer lock according to claim 3 is characterized in that: the order that the computer lock core chip sends to computer above-mentioned steps 5) adopts the mode of md5 authentication sign indicating number to carry out message authentication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167244XA CN102722668A (en) | 2012-05-28 | 2012-05-28 | Wireless safety computer lock and using method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210167244XA CN102722668A (en) | 2012-05-28 | 2012-05-28 | Wireless safety computer lock and using method thereof |
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| CN102722668A true CN102722668A (en) | 2012-10-10 |
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| CN201210167244XA Pending CN102722668A (en) | 2012-05-28 | 2012-05-28 | Wireless safety computer lock and using method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105956450A (en) * | 2016-04-27 | 2016-09-21 | 四川效率源信息安全技术股份有限公司 | Method for locking/unlocking computer screen based on non-contact IC card |
| CN106470045A (en) * | 2015-08-19 | 2017-03-01 | 王战洪 | A kind of portable radio communication device of use public frequency band |
| CN107437638A (en) * | 2017-02-20 | 2017-12-05 | 安徽科微智能科技有限公司 | Battery protection system based on variable plaintext, variable secret key AES encryption |
| TWI632481B (en) * | 2017-05-24 | 2018-08-11 | 系微股份有限公司 | Controlled device and safety management method thereof |
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| CN1516062A (en) * | 2003-01-09 | 2004-07-28 | 北京握奇数据系统有限公司 | Double-interface electronic key |
| CN1590684A (en) * | 2003-09-01 | 2005-03-09 | 景立洪 | Remote control cipher lock device based on status identification and its control method |
| CN1769637A (en) * | 2004-11-01 | 2006-05-10 | 华为技术有限公司 | Electric key and electric lock device and realization method thereof |
| CN101182743A (en) * | 2007-12-11 | 2008-05-21 | 福建敏讯上润电气科技有限公司 | Intelligent puzzle lock and safe thereof |
| CN101833798A (en) * | 2009-09-16 | 2010-09-15 | 徐照英 | Infrared ray remote control electronic coded lock device based on singlechip and control method thereof |
| CN202131857U (en) * | 2011-06-29 | 2012-02-01 | 上海伊可夫信息科技有限公司 | Intelligent wireless remote control lock |
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1516062A (en) * | 2003-01-09 | 2004-07-28 | 北京握奇数据系统有限公司 | Double-interface electronic key |
| CN1590684A (en) * | 2003-09-01 | 2005-03-09 | 景立洪 | Remote control cipher lock device based on status identification and its control method |
| CN1769637A (en) * | 2004-11-01 | 2006-05-10 | 华为技术有限公司 | Electric key and electric lock device and realization method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106470045A (en) * | 2015-08-19 | 2017-03-01 | 王战洪 | A kind of portable radio communication device of use public frequency band |
| CN105956450A (en) * | 2016-04-27 | 2016-09-21 | 四川效率源信息安全技术股份有限公司 | Method for locking/unlocking computer screen based on non-contact IC card |
| CN107437638A (en) * | 2017-02-20 | 2017-12-05 | 安徽科微智能科技有限公司 | Battery protection system based on variable plaintext, variable secret key AES encryption |
| TWI632481B (en) * | 2017-05-24 | 2018-08-11 | 系微股份有限公司 | Controlled device and safety management method thereof |
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Application publication date: 20121010 |