2014/01/14 by Stefano Tomasin, Tomasin, Stefano, Nicola Laurenti +1
Computer Science · Engineering · Mathematics · #Cellular Automata and Applications #Coding theory and cryptography #Cryptography and Security (cs.CR) #FOS: Computer and information sciences #Information Theory (cs.IT) #Wireless Communication Security Techniques #cs.CR #cs.IT #math.IT
paper · pdf · doi:10.48550/arxiv.1401.3088
Proc. Int. Conference on Communications (ICC) 2014
arxiv created 2014/01/14 · openalex publication_date 2014/01/14 · arxiv updated 2014/01/15 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Secure transmission between two agents, Alice and Bob, over block fading channels can be achieved similarly to conventional hybrid automatic repeat request (HARQ) by letting Alice transmit multiple blocks, each containing an encoded version of the secret message, until Bob informs Alice about successful decoding by a public error-free return channel. In existing literature each block is a differently punctured version of a single codeword generated with a Wyner code that uses a common randomness for all blocks. In this paper instead we propose a more general approach where multiple codewords are generated from independent randomnesses. The class of channels for which decodability and secrecy is ensured is characterized, with derivations for the existence of secret codes. We show in particular that the classes are not a trivial subset (or superset) of those of existing schemes, thus highlighting the novelty of the proposed solution. The result is further confirmed by deriving the average achievable secrecy throughput, thus taking into account both decoding and secrecy outage.