Abstract
In this paper, we consider password-based authenticated key exchange with different passwords, where the users only share a password with the trusted server but do not share between themselves. The server helps the users share a cryptographi-cally secure session key by using their different passwords. We propose a light-weight password-based authenticated key exchange protocol with different passwords, i.e., it requires only 2 rounds and 4 modular exponentiations per user. The protocol provides forward secrecy, known-key secrecy, key secrecy against the curious server, and security against undetectable online dictionary attacks without random oracles.
Original language | English |
---|---|
Pages (from-to) | 1042-1064 |
Number of pages | 23 |
Journal | Journal of Universal Computer Science |
Volume | 15 |
Issue number | 5 |
Publication status | Published - 2009 |
Keywords
- Different passwords
- Forward secrecy
- Key secrecy
- Password-based key exchange
ASJC Scopus subject areas
- Theoretical Computer Science
- Computer Science(all)