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