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In a one-way secret key agreement (OW-SKA) protocol in source model, Aliceand Bob have private samples of two correlated variables X and Y that arepartially leaked to Eve through Z, and use a single message from Alice to Bobto obtain a secret shared key. We propose an efficient secure OW-SKA when thesent message can be tampered with by an active adversary. The constructionfollows the approach of an existing OW-SKA with security against passiveadversaries, and uses a specially designed secure Message Authentication Code(MAC) that is secure when the key is partially leaked, to achieve securityagainst active adversaries. We prove the secrecy of the established key androbustness of the protocol, and discuss our results.

A One-way Secret Key Agreement with Security Against Active Adversaries