一种公钥密码方案

A Public Key Cryptographic Scheme

基于Shamir秘密分享方案和ElGamal密码体制,提出了一种要求(t,n)门限解密的公钥密码方案.在该方案中,接收方的n个参与者中任意t个合作才能获得明文,而少于t个合作则无法获得明文的任何比特.对方案的安全性也进行了分析.

This paper proposes a public key cryptographic scheme with （t,n） threshold decryption based on Shamir＇ s secret sharing scheme and E1Gamal＇ s cryptosystem. In this scheme, any t of n participants of the receiver can cooperate to reconstruct the plain text, but any t - 1 or fewer have no access to any bit of the plain text. The security of the scheme is analyzed.