Personal Info

I'm a research assistant at the Cryptography department of Institute of Applied Mathematics (IAM), Middle East Technical University (METU). I received the B.Sc degree in Mathematics from METU, M.S. and Ph.D. degrees in Cryptography from IAM, METU. My research interests are symmetric-key cryptosystems, efficient software implementation of cryptographic algorithms, Boolean functions and sequences.



Publications


International Conferences and Journals

  • E. Uyan, Ç. Çalık, A. Doğanaksoy, "Counting Boolean Functions with Specified Values in their Walsh Spectrum", Journal of Computational and Applied Mathematics, Available online 1 July 2013, ISSN 0377-0427
  • http://dx.doi.org/10.1016/j.cam.2013.06.035
  • Ç. Çalık, A. Doğanaksoy, "Computing the Weight of a Boolean Function from its Algebraic Normal Form", In Tor Helleseth and Jonathan Jedwab, editors, Sequences and Their Applications SETA 2012, volume 7280 of Lecture Notes in Computer Science, pages 89-100. Springer Berlin Heidelberg, 2012.
  • http://dx.doi.org/10.1007/978-3-642-30615-0_8
    slides
  • Ç. Çalık, "An Efficient Software Implementation of Fugue", Second SHA-3 Candidate Conference, Santa Barbara, California, USA, 23-24 August 2010.
  • paper slides
  • Ç. Çalık, M. S. Turan, "Message Recovery and Pseudo-Preimage Attacks on the Compression Function of Hamsi-256", , In Michel Abdalla and Paulo S.L.M. Barreto, editors, Progress in Cryptology LATINCRYPT 2010, volume 6212 of Lecture Notes in Computer Science, pages 205-221. Springer Berlin Heidelberg, 2010 .
  • http://dx.doi.org/10.1007/978-3-642-14712-8_13
    slides
  • Ç. Çalık, M. S. Turan, F. Özbudak, "On Feedback Functions of Maximum Length Nonlinear Feedback Shift Registers", IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Vol.E93-A,No.6,pp.1226-1231,Jun. 2010.
  • paper
  • J-P. Aumasson, Ç. Çalık, W. Meier, O. Özen, R. C.-W. Phan, K. Varıcı, "Improved Cryptanalysis of Skein", In Mitsuru Matsui, editor, Advances in Cryptology ASIACRYPT 2009, volume 5912 of Lecture Notes in Computer Science, pages 542-559. Springer Berlin Heidelberg, 2009.
  • http://dx.doi.org/10.1007/978-3-642-10366-7_32
  • M. S. Turan, Ç. Çalık, N.B. Saran, A. Doğanaksoy, "New Distinguishers Based on Random Mappings Against Stream Ciphers", In Solomon W. Golomb, Matthew G. Parker, Alexander Pott, and Arne Winterhof, editors, SETA, volume 5203 of Lecture Notes in Computer Science, pages 30-41. Springer, 2008 .
  • http://dx.doi.org/10.1007/978-3-540-85912-3_3
    slides
  • M. S. Turan, A. Doğanaksoy, Ç. Çalık, “Statistical Analysis of Synchronous Stream Ciphers”, SASC06 Stream Ciphers Revisited, Leuven, Belgium, 2006.
  • paper

National Conferences

  • A. Doğanaksoy, Ç. Çalık, F. Sulak, "Observations on Hellman’s Cryptanalytic Time-Memory Trade-off", 2. Ulusal Kriptoloji Sempozyumu, Ankara, 2006.
  • paper slides
  • M. S. Turan, A. Doğanaksoy, Ç. Çalık, "Detailed Statistical Analysis of Synchronous Stream Ciphers", 2. Ulusal Kriptoloji Sempozyumu, Ankara, 2006.
  • paper slides
  • A. Doğanaksoy, Ç. Çalık, F. Sulak, M.S. Turan, “New Randomness Tests Using Random Walk”, 2. Ulusal Kriptoloji Sempozyumu, Ankara, 2006.
  • paper slides