|Arbitrarily Varying Wiretap Channels with Non-Causal Side Information at the Jammer
|Carsten Rudolf Janda, Eduard Axel Jorswieck, TU Braunschweig, Germany; Moritz Wiese, Holger Boche, TU Munich, Germany
|P.5: Information Theoretic Security I
|Cryptography, Security and Privacy
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|We investigate the arbitrarily varying wiretap channel with non-causal side information at the jammer for the case that there exists a best channel to the eavesdropper and under the condition that strong degradedness holds. Non-causal side information means that codewords are known at an active adversary before they are transmitted. By considering the maximum error criterion, we allow also messages to be known at the jammer before the corresponding codeword is transmitted. A single letter formula for the common randomness secrecy capacity is derived.