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Author: Magdy Saeb

Affiliation: Arab Academy for Science, Tech. & Maritime Transport, Alexandria, Egypt / Malaysian Institute of Microelectronic Systems (MIMOS Bhd.), Malaysia

Keyword(s): Polymorphic cipher, Homophonic, Random walks, Key-driven, Cryptanalysis, Hash function.

Related Ontology Subjects/Areas/Topics: Cryptographic Techniques and Key Management ; Data and Systems Security ; Information and Systems Security ; Ipsec, Vpns and Encryption Modes ; Public Key Crypto Applications

Abstract: The Chameleon Cipher-192 is a polymorphic cipher that utilizes a variable word size and variable-size user’s key. In the preprocessing stage, the user key is extended into a larger table or bit-level S-box using a specially developed hash-function. The generated table is used in a special configuration to substantially increase the substitution addressing space. Accordingly, we call this table the S-orb. We show that the proposed cipher provides concepts of key-dependent number of rotations, key-dependent number of rounds and key-dependent addresses of substitution tables. Moreover, the parameters used to generate the different S-orb words are likewise key-dependent. We establish that the self-modifying proposed cipher, based on the aforementioned key-dependencies, provides an algorithm polymorphism and adequate security with a simple parallelizable structure. The ideas incorporated in the development of this cipher may pave the way for key-driven encryption rather than merely using the key for sub-key generation. The cipher is adaptable to both hardware and software implementations. Potential applications include voice and image encryption. (More)

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Paper citation in several formats:
Saeb, M. (2009). THE CHAMELEON CIPHER-192 (CC-192) - A Polymorphic Cipher. In Proceedings of the International Conference on Security and Cryptography (ICETE 2009) - SECRYPT; ISBN 978-989-674-005-4; ISSN 2184-3236, SciTePress, pages 198-209. DOI: 10.5220/0002228501980209

@conference{secrypt09,
author={Magdy Saeb.},
title={THE CHAMELEON CIPHER-192 (CC-192) - A Polymorphic Cipher},
booktitle={Proceedings of the International Conference on Security and Cryptography (ICETE 2009) - SECRYPT},
year={2009},
pages={198-209},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0002228501980209},
isbn={978-989-674-005-4},
issn={2184-3236},
}

TY - CONF

JO - Proceedings of the International Conference on Security and Cryptography (ICETE 2009) - SECRYPT
TI - THE CHAMELEON CIPHER-192 (CC-192) - A Polymorphic Cipher
SN - 978-989-674-005-4
IS - 2184-3236
AU - Saeb, M.
PY - 2009
SP - 198
EP - 209
DO - 10.5220/0002228501980209
PB - SciTePress