Identity-free three-factor remote user authentication method
An authentication method and technology for remote users, applied in the field of remote user authentication, can solve problems such as reducing user experience and system fault tolerance, and violating three-factor authentication, achieving the effect of untraceability and anonymous login.
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[0029] Specific embodiments of the present invention are described in detail below.
[0030] In step 1, the server initializes the elliptic curve E over the field GF(p) p And generate server private key s and public key PK=sP, select a one-way hash function h(·) and fuzzy extraction function {Gen(·), Rep(·,·)}. Finally, the server publishes the system public parameters p , h(·), Gen(·), Rep(·,·)>.
[0031] In step 2, the following stages are specifically included:
[0032] User U i Just select PW i Instead of selecting a user identity and entering biometric information Bio i , generated by fuzzy extraction function (σ i , θ i ) = Gen(Bio i ), where σ i is the eigenvalue, and θ i for auxiliary strings. Afterwards, the client generates h(σ i ||n b ) and send it to the server as a registration request through a secure channel, where n b is a random number.
[0033] The server receives user U i The registration request h(σ i ||n b ), generate a random number n i ...
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