Physical layer authentication method based on multi-carrier transmission
An authentication method and a technology of the physical layer, applied in the transmission system, digital transmission system, and multiple use of transmission paths, etc., can solve the problems of key leakage of cryptographic security mechanism and hidden dangers of wireless communication system security, and achieve enhanced security, The effect of good authentication performance
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[0045] The invention will be described in further detail below in conjunction with the accompanying drawings.
[0046] Such as figure 2 As shown, the present invention is based on multi-carrier transmission, regards the channel as a group of M parallel fading sub-channels, and uses the reciprocity and randomness of sub-channel phase responses to perform authentication on the physical layer. The implementation steps of the present invention include: Alice sends an incentive signal to Bob, and after Bob receives the incentive signal, sends a signal encapsulated with a shared key to Alice, and Alice will verify the signal according to the received signal and the shared key Is it from Bob. The specific steps are as follows:
[0047] Step 1: Alice sends an incentive signal to Bob
[0048] Alice at frequency f 1 , f 2 ,...,f M send an equiphase modulated sine wave to Bob In the absence of noise, the signal received by Bob is r B ...
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