226 / 2017-01-13 21:12:42

Tweakable Block Mode of Operation For Disk Encompression Using CipherText Stealing

Block cipher , XTS i.e Xor-Encrypt-Xor with Cipher Text Stealing , Galois Field multiplier GF (2128) , Strong pseudorandom permutation (SPRP) , Tweakable enciphering

n this paper, we study a particular class of symmetric algorithms that aim to ensure confidentiality by using a functionality that is tweakable enciphering scheme. A tweakable enciphering scheme is a length preserving encryption protocol which can encrypt messages of varying lengths. The security goal is to satisfy the notion of the tweakable strong pseudorandom permutation (SPRP). Our proposed work is a modified version of XTS i.e Xor-Encrypt-Xor with Cipher Text Stealing.This work includes a Galois Field multiplier GF (2128) that can operate in any common field representations. This allows very efficient processing of consecutive blocks in a sector. To handle messages whose length is greater than 128-bit but not a multiple of 128-bit.