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Secure RFID tag random number automatic updating method

An RFID tag and automatic update technology, applied in the field of radio frequency identification research, can solve the problems of high cost of label production, achieve high security, reduce algebraic association, and resist tracking attacks

Inactive Publication Date: 2016-12-07
GUANGDONG UNIV OF TECH
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AI Technical Summary

Problems solved by technology

This method solves the problem of high label production cost in the current RFID system, and at the same time improves the security and authentication efficiency of RFID authentication

Method used

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  • Secure RFID tag random number automatic updating method
  • Secure RFID tag random number automatic updating method
  • Secure RFID tag random number automatic updating method

Examples

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Embodiment Construction

[0024] Below in conjunction with application example accompanying drawing, the present invention is described in further detail, what used in this example is Rabin encryption algorithm, Shamir A. has carried out security proof (Shamir A.SQUASH-A newMAC with provable security properties) to this encryption algorithm for highly constrained devices such asRFID tags[C] / / Proc of Fast Software Encryption. Berlin: Springer, 2008: 144-157). However, the implementation method of the present invention is not limited thereto.

[0025] The present invention is realized through the following steps, as figure 1 :

[0026] (1) In the label initialization stage, two random numbers R of length L are saved new and R old , and save tK=1 to indicate that the random number is updated legally (tK=0 indicates that the random number is not updated legally). where R new It will be used as a label random number in the next authentication, and after each legal authentication, R new and R old will...

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Abstract

An RFID authentication method has the capacity of resisting tracking attack, the capacity is not only realized by simple secret key updating, a random number requires to be generated in a tag, and the random number is added to computing of authentication process transmission information. A generator of the random number brings increasing of the design complexity and cost of the tag so that the design of a random number automatic updating method has important research significance and use value. The invention provides a secure RFID tag random number automatic updating method. The conventional random number generator is replaced, and the random number is added to computing of the authentication process transmission information so that the RFID tag is ensured to have different feedback information in each time of authentication, and thus the effect of preventing tag tracking can be realized. The random number automatic updating method is based on the original encryption algorithm in the tag, such as HASH, MIXBITS and Rabin, etc. According to the method, the problem of high manufacturing cost of the tag of the present RFID system can be solved, and the security and the authentication efficiency of RFID authentication can be enhanced.

Description

technical field [0001] The invention relates to the field of radio frequency identification research, in particular to a method for automatically updating tag random numbers in a safe RFID system, wherein the random numbers are used for the calculation of transmission information in the RFID authentication process. Background technique [0002] Radio Frequency Identification (RFID) is a technology that uses radio frequency signals to achieve contactless information transmission, and uses the transmitted information to achieve authentication and identification purposes. With the popularization of RFID, the specifications, cost and performance requirements of RFID tags are getting higher and higher. Small size, low cost, high performance and high security are called standards for measuring the quality of RFID systems. [0003] An RFID system usually includes three parts: a back-end server system, an RFID reader, and an RFID tag. Due to the limited processing power of the tag ...

Claims

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Application Information

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IPC IPC(8): G06K19/073G06F7/58
CPCG06K19/07318G06F7/588
Inventor 欧毓毅魏棉裕
Owner GUANGDONG UNIV OF TECH
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