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Start Over Author "Nandi, Mridul" Journal iacr transactions on symmetric cryptology
20 results on '"Nandi, Mridul"'

11. Double-block Hash-then-Sum: A Paradigm for Constructing BBB Secure PRF

Author

Datta, Nilanjan, Dutta, Avijit, Nandi, Mridul, and Paul, Goutam

Subjects
lcsh:Computer engineering. Computer hardware, Applied Mathematics, lcsh:TK7885-7895, 0102 computer and information sciences, 02 engineering and technology, 01 natural sciences, Computer Science Applications, Computational Mathematics, Sum of PRP, 010201 computation theory & mathematics, Beyond Birthday, 0202 electrical engineering, electronic engineering, information engineering, Cover-free, 020201 artificial intelligence & image processing, DbHtS, Software, Block-wise Universal, PRF
Abstract

SUM-ECBC (Yasuda, CT-RSA 2010) is the first beyond birthday bound (BBB) secure block cipher based deterministic MAC. After this work, some more BBB secure deterministic MACs have been proposed, namely PMAC_Plus (Yasuda, CRYPTO 2011), 3kf9 (Zhang et al., ASIACRYPT 2012) and LightMAC_Plus (Naito, ASIACRYPT 2017). In this paper, we have abstracted out the inherent design principle of all these BBB secure MACs and present a generic design paradigm to construct a BBB secure pseudo random function, namely Double-block Hash-then- Sum or in short (DbHtS). A DbHtS construction, as the name implies, computes a double block hash on the message and then sum the encrypted output of the two hash blocks. Our result renders that if the underlying hash function meets certain security requirements (namely cover-free and block-wise universal advantage is low), DbHtS construction provides 2n/3-bit security. We demonstrate the applicability of our result by instantiating all the existing beyond birthday secure deterministic MACs (e.g., SUM-ECBC, PMAC_Plus, 3kf9, LightMAC_Plus) as well as a simple two-keyed variant for each of them and some algebraic hash based constructions., IACR Transactions on Symmetric Cryptology, Volume 2018, Issue 3

Published
2018

18. Turning Online Ciphers Off

Author

Andreeva, Elena, primary, Barwell, Guy, additional, Bhaumik, Ritam, additional, Nandi, Mridul, additional, Page, Dan, additional, and Stam, Martijn, additional

Published
2017
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