2012/10/05 by Azadeh Sheikholeslami, Sheikholeslami, Azadeh, Dennis Goeckel +3
Computer Science · Engineering · #Cellular Automata and Applications #Chaos-based Image/Signal Encryption #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Communication Security Techniques #Wireless Signal Modulation Classification
paper · pdf · doi:10.48550/arxiv.1210.1790
openalex publication_date 2012/10/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Secure communication over a memoryless wiretap channel in the presence of a\npassive eavesdropper is considered. Traditional information-theoretic security\nmethods require an advantage for the main channel over the eavesdropper channel\nto achieve a positive secrecy rate, which in general cannot be guaranteed in\nwireless systems. Here, we exploit the non-linear conversion operation in the\neavesdropper's receiver to obtain the desired advantage - even when the\neavesdropper has perfect access to the transmitted signal at the input to their\nreceiver. The basic idea is to employ an ephemeral cryptographic key to force\nthe eavesdropper to conduct two operations, at least one of which is\nnon-linear, in a different order than the desired recipient. Since non-linear\noperations are not necessarily commutative, the desired advantage can be\nobtained and information-theoretic secrecy achieved even if the eavesdropper is\ngiven the cryptographic key immediately upon transmission completion. In\nessence, the lack of knowledge of the key during the short transmission time\ninhibits the recording of the signal in such a way that the secret information\ncan never be extracted from it. The achievable secrecy rates for different\ncountermeasures that the eavesdropper might employ are evaluated. It is shown\nthat even in the case of an eavesdropper with uniformly better conditions\n(channel and receiver quality) than the intended recipient, a positive secure\nrate can be achieved.\n