Common Contracts

Efficient User Authentication and Key Agreement With User Privacy Protection

User Authentication and Key Agreement • May 7th, 2008

• Contract Type
  User Authentication and Key Agreement
• Filed
  May 7th, 2008

to retrieve IDi. He then computes αi = h(x||IDi) and decrypts the message Eαi (ruk, h(N1||ruk||λi,k)) and ver- ifies if the authentication tag h(N1||ruk||λi,k) is valid. If it is valid, S sends a nonce N2 and the encrypted message