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Authors: Chuan-Wen Loe and Khoongming Khoo

Affiliation: DSO National Laboratories, Singapore

ISBN: 978-972-8865-63-4

Keyword(s): Cipher Block Chaining, Adaptive Chosen Plaintext Attack, Input-Output Masked CBC.

Related Ontology Subjects/Areas/Topics: Ipsec, Vpns and Encryption Modes

Abstract: In the literature, several encryption modes of operation based on cipher block chaining (CBC) has been proven to be secure under non-adaptive chosen plaintext attack (CPA-1) in the left-or-right (LOR) or find-then-guess (FTG) security models. However, it was shown by Joux et. al. at Crypto 2002 that if we allow the adversary to perform an adaptive chosen plaintext attack (CPA-2), then CBC, ABC and GEM are susceptible to FTG attacks. In this paper, we propose a new CBC-type encryption called input-output masked CBC (IO-CBC) which can protect against FTG and LOR attacks based on forcing an input collision, protects against Joux’s FTG attack under proper implementation, and increases the difficulty of linear and differential cryptanalysis. The efficiency of IO-CBC is comparable to CBC because it does only one additonal encryption when compared with CBC. We also reasoned that the security proof of an IO-CBC variant follows from that of OCB.

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Paper citation in several formats:
Loe C.; Khoo K. and (2006). PROTECTING CIPHER BLOCK CHAINING AGAINST ADAPTIVE CHOSEN PLAINTEXT ATTACK.In Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2006) ISBN 978-972-8865-63-4, pages 135-140. DOI: 10.5220/0002100301350140

@conference{secrypt06,
author={Chuan{-}Wen Loe and Khoongming Khoo},
title={PROTECTING CIPHER BLOCK CHAINING AGAINST ADAPTIVE CHOSEN PLAINTEXT ATTACK},
booktitle={Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2006)},
year={2006},
pages={135-140},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002100301350140},
isbn={978-972-8865-63-4},
}

TY - CONF

JO - Proceedings of the International Conference on Security and Cryptography - Volume 1: SECRYPT, (ICETE 2006)
TI - PROTECTING CIPHER BLOCK CHAINING AGAINST ADAPTIVE CHOSEN PLAINTEXT ATTACK
SN - 978-972-8865-63-4
AU - Loe, C.
AU - Khoo, K.
PY - 2006
SP - 135
EP - 140
DO - 10.5220/0002100301350140

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