supported by the National Natural Science Foundation of China(Grant Nos.61332019,61572304,61572034,and 61272096);the Grant of the Special Zone Project of National Defense Innovation
RSA cryptography is based on the difficulty of factoring large integers, which is an NP-hard(and hence intractable) problem for a classical computer. However, Shor's algorithm shows that its complexity is polynomial f...
This project is supported by National Natural Science Foundation of China(60673053)
To enhance the security of signature schemes, Wang proposed two signature schemes based on the difficulties of simultaneously solving the factoring and discrete logarithm' problems with almost the same sizes of arith...
Project (No. 10271037) supported by the National Natural Sci-ence Foundation of China
A new group signature with one time secret key is proposed. The main merits are that it only needs the trusted center issuing the partial secret key one time for each group member; and that the group member can genera...
Although the He Kiesler signature is said to be proposed based on the discrete logarithm problem and the factorization problem, it has been proved that the signature is not as secure as it was stated to be. A new sig...
Supported by the National Natural Science Foundation of China(No.69772035,69882002) and "863" Programme
Recently, many bit commitment schemes have been presented. This paper presents a new practical bit commitment scheme based on Schnorr's one-time knowledge proof scheme,where the use of cut-and-choose method and many r...