Action of one-way function in public-key authentication protocols
单向函数在公钥认证协议中的作用

Based on the research of public-key authentication protocols, its error to design the kind of protocols using confidential serivce was pointed out. An extended BAN logic was proposed. Two improved public-key authentication protocols were analysed by the extended logic. It shows that one-way function offers the necessary secure services for public-key authentication protocols.