摘要
基于大整数分解困难问题构造一个特殊等式ai1+ai2=hmodφ(N),并引进一个参数传递服务密钥,解密时利用特殊等式和服务密钥可获得会话密钥;在此基础上,提出了面向多服务的基于大整数分解困难问题的叛逆者追踪方案.该方案具有多服务、黑盒子追踪、密文长度是常量、增加或撤销用户以及前向安全性和后向安全性等优点,整体性能好于已有方案.
A special equation is constructed based on LIFP (large integer factoring problem) and a parameter is introduced to transfer service private-key, The session key can be obtained using the special equation αi1+αi2=h modψ(N) and the service private-key in decryption. On the basis of the above, a multi-service oriented traitor tracing scheme on LIFP is proposed. It has many advantages such as multiservice, black-box traitor tracing, ciphertexts of constant size, adding or revoking users, forward and backward security. Its whole capabilities are also better than the existing ones,
出处
《西北师范大学学报(自然科学版)》
CAS
2006年第3期32-36,共5页
Journal of Northwest Normal University(Natural Science)
基金
国家自然科学基金资助项目(60372046)
华为基金资助项目(YSCB2005037NP)