Bidirectional identity authentication method for wireless sensor network node

Abstract

The invention discloses a bidirectional identity authentication method for a wireless sensor network node. Double authentication parties in the identity authentication process need to generate the corresponding physical un-duplicated function (PUF) response according to the challenge provided by the opposite party, and the PUF can not be partitioned with a chip in the node and can not be duplicated, so the node can not be duplicated and attacked; a disposable random number is set in a packet sent by the node during applying for authentication every time, and a signature message is related with the random number, so replay attack of an attacker is avoided; and meanwhile, triple information related with the authentication in the node and the PUF are positioned in the same chip, so even if the attacker acquires the information, other nodes in the network can not be threatened because the PUF property is destroyed.

Description

technical field [0001] The invention relates to a wireless sensor network node bidirectional identity authentication method based on a public key signature and a physical non-replicable function (PUF) against copy attack. Background technique [0002] In wireless sensor networks, many identity authentication methods including public key signature technology are often used as an important means to resist network attacks. However, because the information required for identity authentication between nodes is often stored inside the node, when a node is captured by the attacker, the attacker can easily implement a copy attack, that is, when the node is captured and copied by the attacker After that, other nodes basically cannot effectively identify its identity. Especially in systems such as mobile sensor networks, delay-tolerant sensor networks, and RFID, since nodes or tags are often poorly maintained, whether to resist replication attacks has become an important requirement ...

AI Technical Summary

Problems solved by technology

[0005] 1. Unpredictability: Input challenges to PUF, and the resulting response is difficult to predict

[0006] 2. Difference: The same challenge is input into different PUFs, and the responses generated are quite different and easy to distinguish; different challenges are input into the same PUF, and the responses generated are also quite different and easy to distinguish

This method cannot free the device from the dependence on the database, and is not suitable for distributed systems such as wireless sensor networks

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