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Disperse rotation operator DRT and use in some stream ciphers
March 03, 2022 Β· Declared Dead Β· π IACR Cryptology ePrint Archive
"No code URL or promise found in abstract"
Evidence collected by the PWNC Scanner
Authors
Yong-Jin Kim, Yong-Ho Yon, Son-Gyong Kim
arXiv ID
2203.01495
Category
cs.CR: Cryptography & Security
Citations
0
Venue
IACR Cryptology ePrint Archive
Last Checked
4 months ago
Abstract
The rotation operator is frequently used in several stream ciphers, including HC-128, Rabbit, and Salsa20, the final candidates for eSTREAM. This is because the rotation operator (ROT) is simple but has very good dispersibility. In this paper, we propose a disperse rotation operator (DRT), which has the same structure as ROT but has better dispersibility. In addition, the use of DRT instead of ROT has shown that the quality of the output stream of all three stream ciphers was significantly improved. However, the use of DRT instead of ROT in the HC-128 stream cipher prevents the expansion of differential attacks based on LSB.
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