A Delegation-based Protocol for Anonymous Roaming Authentication in Mobile Communication Network
基于代理签名的移动通信网络匿名漫游认证协议

With the widespread use of mobile devices, issues like roaming authentication and identification privacy become increasingly prominent. This paper analyses the shortcomings of existing protocols of roaming authentication in term of anonymity and security that these protocols can not guarantee at the same time anonymity of mobile terminals and the filtration of illegal request. Based on elliptic-curve cryptography and proxy signature, a new anonymous protocol that allows a pair of proxy signature keys to be shared among some mobile devices randomly is proposed. Through analysis and verification using AVISPA, it shows that the new protocol realizes anonymity, the filtration of illegal request, mutual authentication and secure distribution of session key. It not only improves the security, but also reduces the computational load, which makes it more suitable for mobile devices with limited power.