(redirected from Unknown Key Share Attack)
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UKSAUnknown Key Share Attack (computer security)
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References in periodicals archive ?
The Harn-Lin protocol cannot protect the long-term keys of users while the Dutta-Barua protocol is vulnerable to an unknown key share attack. We have also suggested how the weaknesses can be eliminated.
We find that the conspiration of merely two corrupted participants is sufficient to carry out an unknown key share attack completely.
In fact, we discover that the imperfect key control could further lead to an extended unknown key share attack which was termed as bilateral unknown key share attack as discussed in detail by Chen and Tang in [15].
During the unknown key share attack, each El Gamal signature [[sigma].sub.i] = {[[gamma].sub.i], [[delta].sub.i]} is relayed to a different session involving different set of users due to lack of inclusion of the participants' identities and the session identifiers (first round messages) in the signature scheme.
Our communication model allows the adversary to ask Corrupt queries and thereby captures insider attacks (as well as forward secrecy and unknown key share attacks).
This query captures not only the notion of forward secrecy but also unknown key share attacks and insider attacks.