A Secure Self-Synchronized Stream Cipher. (26th May 2018)

• Record Type: Journal Article
• Authors: Daneshgar, Amir; Mohebbipoor, Fahimeh
• Is Part Of: Computer journal. Volume 61:Number 8(2018)
• Page Start: 1180
• Page End: 1201
• Publication Date: 2018-05-26
• Subjects: symmetric cryptography -- self-synchronized stream cipher -- unknown input observer; Computers -- Periodicals; 005.1
• DOI: 10.1093/comjnl/bxy053
• Languages: English
• ISSNs: 0010-4620

Abstract

Abstract: We follow two main objectives in this article. On the one hand, we introduce a security model called LORBACPA + for self-synchronized stream ciphers which is stronger than the blockwise LOR-IND-CPA, where we show that standard constructions as delayed CBC or similar existing self-synchronized modes of operation are not secure in this stronger model. Then, on the other hand, following contributions of Millérioux et al., we introduce a new self-synchronized stream cipher and prove its security in LORBACPA + model.