ON SECURITY OF A PRACTICAL THREE-PARTY KEY EXCHANGE PROTOCOL WITH ROUND EFfiCIENCY
Cheng‐Chi Lee, Ya‐Fen Chang · Information Technology And Control · 2008
Recently, Chang proposed a practical three-party key exchange (C-3PEKE) protocol with round efficiency. Unfortunately, this paper shall show that C-3PEKE is not secure and suffers from off-line password guessing attacks.