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A Provably Secure Anonymous Two-Factor Authenticated Key Exchange Protocol for Cloud Computing

Wei F., Zhang R., Ma C

Fundamenta Informaticae

2018

Vol. 157, nr 1/2

201--220

Two-factor authenticated key exchange (TFAKE) protocols are critical tools for ensuring identity authentication and secure data transmission for cloud computing. Until now, numerous TFAKE protocols based on smart cards and passwords are proposed under this circumstance. Unfortunately, most of them are found insecure against various attacks. Researchers focus on cryptanalysis of these protocols and then fixing the loopholes. Little attention has been paid to design rationales and formal security models of these protocols. In this paper, we summarize the security requirements and put forward a formal security model for TFAKE protocols for cloud computing. We then present an efficient TFAKE protocol without using expensive asymmetric cryptology mechanisms to achieve high efficiency. Our protocol can be proven secure in the random oracle model and achieves user anonymity. Compared with other TFAKE protocols, our protocol is more efficient and enjoys provable security.

Pairs of derivations on rings and Banach algebras

Wei F., Xiao Z.

Demonstratio Mathematica

2008

Vol. 41, nr 2

297-308

We give a generalization of Vukman's theorem concerning a pair of derivations on rings. Then applying this purely algebraic result we obtain several range inclusion results of pair of derivations on Banach algebras.

Generalized Jordan derivations on semiprime rings

Wei F., Xiao Z.

Demonstratio Mathematica

2007

Vol. 40, nr 4

789-798

It is shown that, given a 2-torsion-free semiprime ring with unit e, every generalized Jordan derivation on R is a generalized derivation. Let n be a fixed positive integer, R be a noncommutative (n+1)!-torsion-free prime ring with the center CR. It is proved that, if [..]: R -> R is a generalized Jordan derivation of R such that [..](x)xn + x [...].