Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
454232 | Computer Standards & Interfaces | 2010 | 6 Pages |
Abstract
Crypton is a 128-bit block cipher which was submitted to the Advanced Encryption Standard competition. In this paper, we present two new impossible differential attacks to reduced-round Crypton. Using two new observations on the diffusion layer of Crypton, exploiting a 4-round impossible differential, and appropriately choosing three additional rounds, we mount the first impossible differential attack on 7-round Crypton. The proposed attacks require 2121 chosen plaintexts each. The first attack requires 2125.2 encryptions. We then utilize more pre-computation and memory to reduce the time complexity to 2116.2 encryptions in the second attack.
Keywords
Related Topics
Physical Sciences and Engineering
Computer Science
Computer Networks and Communications
Authors
Hamid Mala, Mohsen Shakiba, Mohammad Dakhilalian,