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 Jul 17 |
Keywords
- Different passwords
- Forward secrecy
- Key secrecy
- Password-based key exchange
ASJC Scopus subject areas
- Computer Science(all)
- Theoretical Computer Science
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Cite this
Kwon, J. O., Jeong, I. R., & Lee, D. H. (2009). Light-weight key exchange with different passwords in the standard model. Journal of Universal Computer Science, 15(5), 1042-1064.