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Student ETU EDOC EDIC Doctoral Assistant IC IIF LACAL

Onur Özen Doctoral Program in Computer, Communication and Information Sciences PhD Student web site: http://personnes.epfl.ch/onur.ozen office(s): INJ332 phone(s): [+41 21 69] 36685 EDUCATION BSc. in Department of Mathematics, Middle East Technical University, Ankara, Turkey, September 2001-June 2006. MSc. in Cryptography, Institute of Applied Mathematics, Middle East Technical University, Ankara, Turkey, September 2006-January 2008. RESEARCH INTERESTS Symmetric-key cryptology and cryptographic hash functions. MAIN PUBLICATIONS Foundations of Efficient Hashing: Collisions are not Incidental, Dimitar Jetchev, Onur Özen, Martijn Stam, To appear at TCC 2012 Efficient Hashing using the AES Instruction Set, Joppe W. Bos, Onur Özen, Martijn Stam, CHES 2011, Volume 6917 of LNCS, pages 507-522, 2011 Collision Attacks against Knudsen-Preneel Compression Functions, Onur Özen, Martijn Stam, Asiacrypt 2010, Volume 6477 of LNCS, pages 76-93, 2010 Attacking the Knudsen-Preneel Compression Functions , Onur Özen, Thomas Shrimpton, Martijn Stam, Fast Software Encryption (FSE `10), Volume 6147 of LNCS, pages 94-115, 2010 Improved Cryptanalysis of Skein, Jean Phillippe Aumasson, Çağdaş Çalık, Willi Meier, Onur Özen, Raphael C.-W. Phan, Kerem Varıcı, Asiacrypt 2009, Volume 5912 of LNCS, pages 542-559, 2009 Analysis and Optimization of Cryptographically Generated Addresses, Joppe W. Bos, Onur Özen, Jean-Pierre Hubaux, Information Security Conference (ISC) 2009, volume 5735 of LNCS, pages 17-32, 2009. Another Glance at Double-Length Hashing, Onur Özen, Martijn Stam, 12th IMA International Conference on Cryptography and Coding (IMACCC `09), Volume 5921 of LNCS, pages 176-201,2009. Lightweight Block Ciphers Revisited: Cryptanalysis of Reduced Round PRESENT and HIGHT, Onur Özen, Kerem Varıcı, Cihangir Tezcan, Çelebi Kocair, 14th Australasian Conference on Information Security and Privacy (ACISP), Volume 5594 of LNCS, pages 90-107, 2009 On the Security of the Encryption Mode of Tiger, Onur Özen, Kerem Varıcı, 3rd Information Security and Cryptology Conference (ISC Turkey), 2007. (Also Presented in Ecrypt Tools for Cryptanalysis Workshop, 2007)