Title :
Improved Impossible Differential Cryptanalysis on SMS4
Author_Institution :
Sch. of Comput. Sci. & Technol., Donghua Univ., Shanghai, China
Abstract :
This paper presents an improved impossible differential attack on the block cipher SMS4 which is used in WAPI (the Chinese WLAN national standard). Combining with some new observations, this paper can filter out the wrong keys more efficiently, and present an impossible differential attack on 17-round SMS4, which updates the best known impossible differential attacks on reduced SMS4.
Keywords :
cryptography; telecommunication security; wireless LAN; Chinese WLAN national standard; WAPI; block cipher SMS4; differential attack; differential cryptanalysis; Complexity theory; Computers; Education; Encryption; Wireless LAN; SMS4; block cipher; cryptanalysis; impossible differential attack;
Conference_Titel :
Communications and Intelligence Information Security (ICCIIS), 2010 International Conference on
Conference_Location :
Nanning
Print_ISBN :
978-1-4244-8649-6
Electronic_ISBN :
978-0-7695-4260-7
DOI :
10.1109/ICCIIS.2010.26
