摘要
不经意传输协议作为密码学的基础协议在实际生活中有很多应用,其构造方法分直接和间接构造两种。利用整数的t进制表示和DDH假设等概念,在Naor-Pinkas方案的基础上,给出了一个计算上更简单的协议间接构造方法,再借助现有公钥体制的同态性给出了不经意传输协议的直接构造方法。
As a fundamental cryptology protocol,oblivious transfer is applied abroad in practice. The methods to construct the protocol are divided into two kinds,direct and indirect. With the help of idea of the representation of integer in base t and the DDH assumption,it proposes a kind of indirect method to construct the protocol with lower computation complexity based on Naor- Pinkas＇s scheme,moreover,another kind of direct method is put forward in terms of the some public cryptosystems with homomorphism.
出处
《现代电子技术》
2007年第21期76-78,共3页
Modern Electronics Technique
关键词
不经意传输
同态加密
同态性
DDH假设
oblivious transfer
homomorphic encryption
homomorphism
Decisional Diffie - Hellman assumption
