Elliptic Curve Cryptosystems (ECC) have recently received significant attention by researchers due to their high performance such as low computational cost and small key size. In this paper a novel untraceable blind signature scheme is presented. Since the security of proposed method is based on difficulty of solving discrete logarithm over an elliptic curve, performance of the proposed scheme ...

Our research extends the bit-sliced signature organization by introducing a partial evaluation approach for queries. The partial evaluation approach minimizes the response time by using a subset of the on-bits of the query signature. A new signature file optimization method, Partially evaluated Bit-Sliced Signature File (P-BSSF), for multi-term query environments using the partial evaluation ap...

Essentially all known one-time signature schemes can be described as special instances of a general scheme suggested by Bleichenbacher and Maurer based on “graphs of one-way functions”. Bleichenbacher and Maurer thoroughly analyze graph based signatures from a combinatorial point of view, studying the graphs that result in the most efficient schemes (with respect to various efficiency measures,...

The signature file method is a popular indexing technique used in information retrieval and databases. It excels in efficient index maintenance and lower space overhead. Different approaches for organizing signature files have been proposed, such as sequential signature files, bit-slice files, S-trees, and its different variants, as well as signature trees. In this paper, we extends the structu...

In recent years it has been trying that with regard to the question of computational complexity of discrete logarithm more strength and less in the elliptic curve than other hard issues, applications such as elliptic curve cryptography, a blind  digital signature method, other methods such as encryption replacement DLP. In this paper, a new blind digital signature scheme based on elliptic curve...

Due to applications of trusted computing become more and more widespread, that how to protect client’s privacy is imminent. However, existing solutions can hardly meet practical requirement. Therefore, this dissertation puts forward an improved authentication which realizes Direct Anonymous Attestation with ring signature based on one-way accumulator, and constructs its solution in detail. In t...