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Radio frequency identification (RFID) privacy authenticating method

An authentication method and radio frequency identification technology, applied in the security technology field related to radio frequency identification tag authentication, can solve the problems of affecting tag privacy, inability to meet forward security, lack of update mechanism, etc., to achieve strong security, reduce storage and Computational overhead, the effect of ensuring forward security

Inactive Publication Date: 2011-06-01
XI AN JIAOTONG UNIV
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AI Technical Summary

Problems solved by technology

1) Lack of update mechanism, cannot satisfy forward security
2) At least one key is shared between any two tags, and if some tags are deciphered, it will affect the privacy of other tags in the key tree

Method used

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  • Radio frequency identification (RFID) privacy authenticating method
  • Radio frequency identification (RFID) privacy authenticating method
  • Radio frequency identification (RFID) privacy authenticating method

Examples

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Embodiment Construction

[0025] In order to make the purpose, technical scheme and advantages of the present invention clearer, the following will be combined with the attached image 3 , 4 The present invention is further described in detail.

[0026] Let h(·), F(·) be the digest function {0, 1} in the sense of cryptography * → {0, 1} l , where l is the security parameter of the RFID system, here is the security strength of the tag. Suppose there are n tags T in the system i , 1≤i≤n, and reader R. Reader R organizes the keys of all tags according to the tags' indexes.

[0027] When the RFID system is initialized, select the security parameters of the system and the index length b. Reader for each tag T i Randomly specify a key key i and index index i . And use the summary function h( ) to calculate the index i The digest value {h(s)} corresponding to all elements s in the domain S of . The tuple (h(s), s) is stored at physical address F(h(s)). The function F(·) is a processing of the out...

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Abstract

The invention discloses a radio frequency identification (RFID) privacy authenticating method which comprises the following steps: system initialization: a reader-writer stores secret keys and indexes of all labels and a summary value of an index space; label recognition: the reader-writer transmits an authenticating request to the labels, the labels calculate and transmit authenticating information to the reader-writer, and reader-writer recognizes the labels after receiving the authenticating information; updating: after the labels are authenticated, the reader-writer updates the secret keys and the indexes of the labels and transmits updated information to the labels, and the labels update the stored secret keys and the indexes; and system maintenance: when the labels enter or depart from an RFID system, the reader-writer maintains the secret keys and the indexes of the labels. The invention can effectively resist various prior passive and active attacks; compared with an RFID authenticating method based on a balanced tree structure, the invention greatly reduces the storage and calculation cost at the label ends.

Description

technical field [0001] The invention relates to radio frequency identification technology, in particular to safety technology related to radio frequency identification label authentication. Background technique [0002] Radio Frequency Identification (Radio Frequency Identification, referred to as "RFID") is the use of radio frequency technology for non-contact identification of objects. A significant advantage of this technique is that no physical or actual contact is required. RFID has a wide range of application prospects, and has been widely used in retail, electronic passports, personal ID cards, logistics, food storage, drug monitoring and other fields. [0003] The main components of the RFID system include a tag (Tag), a reader (Reader) and a back-end database (Back-end database, referred to as "DB"). The tags contain an antenna and an integrated circuit, usually without a processor. Some information and a unique identification (ID) of the item to which it is atta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06K17/00
Inventor 齐勇姚青松韩劲松赵季中李向阳刘云浩
Owner XI AN JIAOTONG UNIV
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