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• Program committee member: Hash Function Workshop 2011, Tallinn, Estonia.
• Reviewer: Eurocrypt 2012, Eurocrypt 2011, IEICE 2011, ESORICS 2011, IJIS 2011, FSE 2011, Asiacrypt 2010, Latincrypt 2010, 9th Central European Conference on Cryptography, Eurocrypt 2010, FSE 2010, Journal of Designs, Codes and Cryptography, Asiacrypt 2009, ISC 2009, Eurocrypt 2009, SAC 2009, Crypto 2009, FSE 2009, Journal of Discrete Applied Mathematics, Asiacrypt 2008, SAC 2008, Eurocrypt 2008, Eurocrypt 2007, Crypto 2007, SAC 2007, ACM CCS 2007, FSE 2007, Crypto 2006, ICALP 2006, etc.