The Computer Journal Advance Access published online on June 10, 2009
The Computer Journal, doi:10.1093/comjnl/bxp054
Side-Channel Attack Using Meet-in-the-Middle Technique
Center for Information Security Technologies (CIST), Korea University, Seoul, Korea
* Corresponding author: hsh{at}cist.korea.ac.kr
Received 17 December 2008; revised 17 March 2009
In this paper, we introduce a new side-channel attack using block cipher cryptanalysis named a meet-in-the-middle attack. Using our new side-channel technique we show that advanced encryption standard (AES) with reduced 10 masked rounds is broken, which is faster than the exhaustive key search attack. This implies that one has to mask the entire rounds of the 12-round 192-bit key AES to prevent our attacks. Our result is the first one to analyse AES with reduced 10 masked rounds, while the previous best known side-channel attack is on AES with reduced eight masked rounds.
Key Words: security side-channel attak hamming weight measurement AES