Authentication method and apparatus for wireless radio frequency recognition system

Abstract

The embodiment of the invention discloses an authentication method for a wireless radio frequency identification (RFID) system. Anonymity of a tag is ensured by updating ID in each authentication; and an (ID, P-key) pair of the tag is stored in a reader party, and only the (ID, P-key) part in the reader party, which is inconsistent with the content transmitted by the tag, is updated by the reader party, such that synchronicity of data update can be ensured. The embodiment of the invention also discloses an authentication device for the wireless radio frequency identification (RFID) system. By adopting the embodiment of the invention and by ensuring the anonymity of the tag through ID update, the asynchronism of data update easily caused by the adoption of an ID updating mechanism in a common RFID air interface protocol can be simultaneously solved.

Description

Technical field [0001] The present invention relates to the field of communication technology, and in particular to an authentication method and equipment in an RFID (Radio Frequency Identification, radio frequency identification) system. Background technique [0002] RFID technology is a non-contact automatic identification technology that has matured since the 1980s. It uses radio frequency signals to automatically identify target objects and obtain relevant data without manual intervention. Because RFID technology has the characteristics of multi-target recognition and non-contact recognition, it has been widely used in manufacturing, commerce, military, daily life and other fields, and has shown huge development potential and application space. It is considered to be the most promising development in the 21st century. One of the promising technologies. [0003] Although RFID technology has a wide range of application prospects, the lack of effective security mechanisms in RFI...

AI Technical Summary

Problems solved by technology

[0035] There is no dynamic ID refresh mechanism in the authentication based on the query-response method in the prior art. Once the attacker obtains the ID of the tag, the tag can be counterfeited; holder to track

Although dynamic refresh is used in the method based on two-way authentication, there is a problem of out-of-sync data update: if the tag is not updated successfully twice in a row, then in the next communication, due to the encryption of the key pair stored in the tag and the background database The key pair does not match, and the legal label cannot pass the authentication

In the final step of authentication, if M 2 intercepted, the tag's key pair (K x_i , P x_i ) will not be updated in time, and the background database key pair (K old , P old ), (K new , P new ) has been updated, but at this time there is still a pair of keys in the two sets of key pairs in the background database that can match the key pair of the label, but if M 2 It has been intercepted more than twice. At this time, the two sets of key pairs in the background database have been updated, but the key pair of the tag has not been updated. There is no matching key pair between the tag and the background database. Therefore, the next time the tag communicates and the reader will not be able to mutually authenticate

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