Trapdoor Sanitizable Signatures Made Easy
A sanitizable signature scheme allows a signer to partially delegate signing rights on a message to another party, called a sanitizer. After the message is signed, the sanitizer can modi.fy pre-determined parts of the message and generate a new signature on the sanitized message without interacting with the signer. At ACNS 2008, Canard et al. introduced trapdoor sanitizable signatures based on identity-based chameleon hashes, where the power of sanitization for a given signed message can be delegated to possibly several entities, by giving a trap door issued by the signer at any time. We present a generic construction of trapdoor sanitizable signatures from ordinary signature schemes. The construction is intuitively simple and answers the basic theoretic question about the minimal computational complexity assumption under which a trapdoor sanitizable signature exists; onc-way functions imply trapdoor sanitizable signatures.
Dae Hyun Yum Jae Woo Seo Pil Joong Lee
Electronic and Electrical Engineering, POSTECH, Republic of Korea
国际会议
8th International Conference,ACNS 2010(第八届国际应用密码与网络安全大会)
北京
英文
53-68
2010-06-22（万方平台首次上网日期，不代表论文的发表时间）