This work is supported by the National Natural Science Foundation of China (No.60503006, No.60573039) and Program of Science and Technology of Guangzhou, China (No.2008J1-C231-2).
It seems that all existing on-line/offline (threshold) signature schemes based on Shamir- Tauman's paradigm suffer from the key exposure problem of chameleon hashing. In this paper, we firstly propose a new efficie...
Supported by the National Natural Science Foundation of China (No. 60403007, No. 60503006, No. 60572059);the Natural Science Foundation of Guangdong Province, China (No.05300706).
Proxy signatures have been used to enable the transfer of digital signing power within some context and ring signatures can be used to provide the anonymity of a signer. By combining the functionalities of proxy signa...