Lightweight class method for preventing relay attack under P2P (point-to-point) communication mode in NFC (near field communication)

Abstract

The invention discloses a lightweight class method for preventing relay attack under P2P (point-to-point) operation mode in NFC (near field communication). During the P2P communication process of two NFC devices, device roles are changed through continuous negotiation, so that two devices change the communication method continuously during the communication process. For a relay attacker cannot predict the communication role of a legal device in every communication process, and further cannot realize the purpose of successfully pairing with the legal device through correctly configuring own role. If the attacker cannot be successfully paired with the legal device, and the purpose of successfully practicing the relay attack of transfer data cannot be realized. The lightweight class method effectively reduces the success probability of the relay attack within a certain scale; the communication device can safely transmit data under the condition of no any hardware.

Description

technical field [0001] The invention relates to data communication protection technology, in particular to a lightweight method for preventing relay attacks in a point-to-point communication mode in near-field communication. Background technique [0002] Near Field Communication (NFC) is an emerging short-range wireless communication technology, and its communication is usually within a range of 10cm. NFC technology is evolved on the basis of RFID technology and is backward compatible with RFID. Its short-range communication and relatively low data transmission rate make it suitable for access control, mobile payment, access control system and other applications where a small amount of data is exchanged. For example, mobile phones and access control system card readers with NFC function exchange challenge response data through NFC to achieve the purpose of identity authentication. In 2013, Google launched the Google Wallet based on the NFC platform for transaction payment....

AI Technical Summary

Problems solved by technology

[0010] For method 1, the location information of the device is affected by the GPS accuracy and GPS signal. If the accuracy is too low, it will be impossible to tell whether it is under attack due to the large calculation error. If the signal is too poor or there is no signal, then the GPS provided cannot be used. Location information calculates the physical distance of the device

[0011] For method 2, although it can ensure that the device is free from relay attacks when it is not in use, the use of the device becomes complicated, which reduces the convenience of NFC communication. cost

[0012] For method 3, it is necessary to add an additional paper process and keep the information on the paper strictly confidential, which makes the communication process more complicated and increases the transaction time. In addition, if the information on the paper is leaked, the relay attack will still be successful.

[0013] For method 4, the use of distance-limited protocols requires low-latency equipment, while traditional radio frequency channels introduce a lot of redundant data and time tolerance in order to maintain data stability, resulting in time uncertainty

[0014] For method 5, entering a PIN code or adding key operations increases user participation, the use process is more complicated and the transaction time is prolonged, and the convenience of NFC communication is greatly reduced

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