Dear all; Salam; The 73rd cryptology session will be held on Sunday 9/Aban/1389 (31/October/2010) at 3pm in ISSL. Speaker : Majid Rahimi Subject : Investigation of new attacks on Trivium Regards, Dear all; Salam; The 72nd cryptology session will be held on Sunday 25/Mehr/1389 (17/October/2010) at 3pm in ISSL. Speaker : Milad Marvian Subject : Quantum secret sharing using quantum carriers Regards, Dear all; Salam; The 71st cryptology session will be held on Sunday 11/Mehr/1389 (3/October/2010) at 3pm in ISSL. Speaker : Majid Bayat Subject : Attribute based cryptography Regards, Dear all; Salam; The 70th cryptology session will be held on Sunday 14/Shahrivar/1389 (5/September/2010) at 3pm in ISSL. Speaker : Diman Tootaghaj Subject : Analysis of Routing Misbehavior in Ad Hoc Networks Regards, Dear all; Salam; The 69th cryptology session will be held on Sunday 31/Mordad/1389 (22/August/2010) at 3pm in ISSL. Speaker : Mehdi Alaghband Subject : Lightweight Cryptography Regards, Dear all; Salam; The 68th cryptology session will be held on Sunday 17/Mordad/1389 (8/August/2010) at 3pm in ISSL. Speaker : Mr. Houshmand Subject : Jointly Error Correction and Encryption Regards, Dear all; Salam; The 67th cryptology session will be held on Sunday 3/Mordad/1389 (25/July/2010) at 3pm in ISSL. Speaker : Ehsan Kazemi Subject : Collision Attacks on Hash Functions using Linearization of Compress Function Regards, Dear all; Salam; The 66th cryptology session will be held on Sunday 20/Tir/1389 (11/July/2010) at 3pm in ISSL. Speaker : Mr. Houshmand Subject : Jointly Error Correction and Encryption Regards, Dear all; Salam; The 65th cryptology session will be held on Sunday 23/Khordad/1389 (13/June/2010) at 3pm in NEW ISSL. Speaker : Majid Rahimi Subject : Cube Attack Regards, Dear all; Salam; The 64rd cryptology session will be held on Sunday 9/Khordad/1389 (30/May/2010) at 3pm in NEW ISSL (E.E. Dep, 2nd floor, end of corridor, right-sided LAB). Speaker : Neda Rohani & Zeynab Noferesti Subject : Distinguishing Attack on Trivium & Bivium Regards, Dear all; Salam; The 63rd cryptology session will be held on Sunday 12/Ordibehesht/1389 (2/May/2010) at 3pm in ISSL. Speaker : Ehsan Kazemi Subject : How to find codewords with low hamming weights in linear binary codes Regards, Dear all; Salam; The 62nd cryptology session will be held on Sunday 29/Farvardin/1389 (18/April/2010) at 3pm in ISSL. Speaker : Milad Marvian Subject : Quantum Secret Sharing Regards, Dear all; Salam; Happy new year! The 61st cryptology session will be held on Sunday 15/Farvardin/1389 (4/April/2010) at 3pm in ISSL (Room#013). Speaker : Hadi Soleymani Subject : Related-key Cryptanalysis of AES (pre-defense) Regards, Dear all; Salam; The 60th cryptology session will be held on Sunday 16/Esfand/1388 (7/March/2010) at 3pm in ISSL (Room#013). Speaker : Diman Tootaghaj Subject : Routing Misbehaviors in Ad Hoc Networks Regards, Dear all; Salam; The 59th cryptology session will be held on Sunday 2/Esfand/1388 (21/Feb/2010) at 3pm in ISSL (Room#013). Speaker : Seyed Mehdi Mohammad Hassanzadeh Affiliation: Selmer Center, University of Bergen, Norway Subject : Meet-In-The-Middle attacks on Hash Functions Regards, Dear all; Salam; The 58th cryptology session will be held on Sunday 18/Bahman/1388 (7/Feb/2010) at 3pm in ISSL. Speakers : Alireza Sharifi & Hadi Soleymani Subject : Boomerang Attack on AES Regards, Dear all; Salam; The 57th cryptology session will be held on Sunday 4/Bahman/1388 (24/Jan/2010) at 3pm in ISSL. Speaker : Ali Vardasbi Subject : Cube Attack on Stream Ciphers Regards, Dear all; Salam; The 56th cryptology session will be held on Sunday 22/Azar/1388 (13/Dec/2009) at 3pm in ISSL. Speaker : Ehsan Kazemi Subject : Some topics on Hash Functions Regards, Dear all; Salam; The 55th cryptology session will be held on Sunday 24/Aban/1388 (15 November 2009) at 3pm in ISSL. Speakers: Zeynab Noferesti & Neda Rohani Subject : Distinguish Attack on GRAIN Regards, Dear all; Salam; The 54th cryptology session will be held on Sunday 10-Aban-1388 (1 November 2009) @ 3pm in ISSL. Speaker : Hadi Soleymani & Alireza Sharifi Subject : Related-key Boomerang Attacks on AES Regards, Dear all; Salam; The 53rd cryptology session will be held on Sunday 26-Mehr-1388 (18 Octobor 2009) @ 3pm in ISSL. Speaker : Ali-Akbar Sayyadi Subject : Pre-defense session of his thesis about T-functions Regards, Dear all; Salam, The 52nd cryptology session will be held on Sunday 12-Mehr-1388 (4 Octobor 2009) @ 3pm in ISSL. Speaker : Hanieh Sedghi Subject : Improvement of Routing Security in Ad-hoc Networks Against Different Attacks Regards, Dear all; Salam, The 51st cryptology session will be held on Sunday 15-Shahrivar-1388 (6 September 2009) @ 4:30pm in ISSL. Speaker : Mitra Fatemi Subject : Multi-stage Multi-Secret Sharing Scheme Regards, Dear all; Salam, The 50th cryptology session will be held on Sunday 1-Shahrivar-1388 (23 August 2009) @ 4:30pm in ISSL. Speaker : Hadi Soleymani & Alireza Sharifi Subject : Related-key Impossible Differential Attack on AES Regards, Dear all; Salam, The 49th cryptology session will be held on Sunday 4-Mordad-1388 (26 July 2009) @ 4:30pm in ISSL. Speaker : Ameneh Farhadian Subject : RBO Method Regards, Dear all; Salam, The 48th cryptology session will be held on Sunday 10-Khordad-1388 (31 May 2009) @ 4:30pm in ISSL. Speaker : Mitra Fatemi Subject : An Alterable Multi-Stage Secret Sharing Scheme Regards, Dear all; Salam, The 47th cryptology session will be held on Sunday 27-Ordibehesht-1388 (17 May 2009) @ 4:30pm in ISSL. Speaker : Ehsan Mokhtari Subject : Sensor Networks Security Regards, Dear all; Salam, The 46th cryptology session will be held on Sunday 13-Ordibehesht-1388 (3 May 2009) @ 4:30pm in ISSL. Speaker : Hanieh Sedghi Subject : A New Routing Protocol to Avoid Selfishness in MANETs Regards, Dear all; Salam, The 45th cryptology session will be held on Sunday 30-Farvardin-1388 (19 April 2009) at 4:30pm in ISSL. Speaker : Zahra Ahmadian Subject : A Practical Distinguish Attack on Shannon Stream Cipher Regards, Dear all; Salam, The 44th cryptology session will be held on Sunday 16-Farvardin-88 (5 April 2009) at 4:30pm in ISSL. Speaker : Ali Vardasbi Subject : Linear cryptanalysis of stream ciphers Sincerely, Dear all; Salam, The 43rd cryptology session will be held on Sunday 18-Esfand-87 (8 March 2009) at 4:30pm in ISSL. Speaker : Milad Marvian Subject : An Intrduction to Quantum Cryptography Regards, P.S. It will be the last session of this year! I'm glad to say HAPPY NEW YEAR with best wishes Dear all; Salam, The 42nd cryptology seminar will be held on Sunday 4-Sfand-87 (22 Feb 09) at 4:30pm in ISSL. Speaker : Ehsan Kazemi Subject : A Survey on R.A. Rueppel's Thesis Sincerely, Salam, The 41st C-r-y-p-t seminar will be held on Sunday 20 Bahman 1387 (8 Feb 2009) at 4:30pm in ISSL. Speaker : Hanieh Sedghi Subject : MANET Routing Security Against Selfish Attacks II Sincerely, Salam, The 40th C-r-y-p-t seminar will be held on next Sunday 6-Bahman-1387 (25th Jan 2009) at 4:30pm in ISSL. Speaker: Mr. Sayyadi Subject: Introduction to T-Functions Sincerely, Salam, The 39th C-r-y-p-t seminar will be held on Sunday 22-Dey-1387 (11th Jan 2009) at 4:30pm in ISSL. Speaker: Alireza Sharifi Subject: Non-linear Feedback Shift Register (NLFSR) Sincerely, Salam, The 38th C-r-y-p-t seminar will be held on Sunday 8-Dey-1387 (28th Dec 2008) at 4:30pm in ISSL. 4:30pm - 5:00pm Speaker1: Mitra Fatemi Subject: A Multi-stage Multi Secret Sharing Scheme 5:00pm - 5:30pm Speaker2: Alireza Sharifi Subject: Non-linear Feedback Shift Register Sincerely, Salam, The 37th C-r-y-p-t seminar will be held on Sunday Azar 24th 1387 (Dec14th2008) at 4:30pm in ISSL. Speaker : Behnam Bahrak Subject : Secure Cooperative Spectrum Sensing in Cognitive Radio Networks PhD Candidate at Virginia-Tech University Sincerely, p.s. The SBiSC Election will be held on Sunday Azar 24th 1387 at 2:50pm in Kahroba. Salam, The 36th C-r-y-p-t seminar will be held on Sunday The 16th November 2008 (26 Aban 1387) at 4:30pm in ISSL. Speaker : Mohammad Heydari Subject : Stream Cipher, Past Present Future PhD candidate at Khajeh-Nasir-Toosi university Sincerely, p.s. The registration deadline of the second workshop is near! Salam, The 35th C-r-y-p-t seminar will be held on Sunday The 2nd November 2008 (12 Aban 1387) at 4:30pm in ISSL. Speaker : Hanieh Sedghi Subject : MANET Routing Security Against Selfish Attacks Masters : Dr. Aref, Dr. Pakravan Sincerely, p.s. The registration of the second workshop was started. Salam, The 34rd c-r-y-p-t-o-g-r-a-p-h-y seminar will be held on Sunday (The 19th Octobor, 28 Mehr) at 4:30pm in ISSL. Speaker : Farshid Farhat Subject : A Survey on GSM Security Sincerely, Salam, The 33rd c-r-y-p-t-o-g-r-a-p-h-y seminar will be held on Sunday (The 5th Octobor, 14 Mehr) at 4:30pm in ISSL. Speaker : Nima Mousavi Subject : Secure Network Coding (thesis pre-defence) Sincerely, Salam, The 32nd c-r-y-p-t-o-g-r-a-p-h-y seminar will be held on Monday (The 8th September, 18 Shahrivar) at 11am in ISSL. Speaker : Mitra Fatemi Subject : Multi Secret Sharing Sincerely, Salam, The 31st c-r-y-p-t-o-g-r-a-p-h-y seminar will be held on Monday (The 25th Aug, 4 Shahrivar) at 11am in ISSL. Speaker : Alireza Sharifi Subject : Algebraic C-r-y-p-t-analysis from a Grobner Basis Perspective Sincerely, Salam, The 30th c-r-y-p-t-o-g-r-a-p-h-y seminar will be held on next Monday (The 11th July, 21 Mordad) at 11am. Speaker : Hadi Ahmadi Title: Systematic Guess-and-Determine Attack on Stream Ciphers Abstarct: Guess-and-Determine (GD) attacks are general attacks on stream ciphers which have often been implemented heuristically. In this paper we introduce a systematic approach to design of GD attacks, using a well-known decoding algorithm for convolutional codes, namely the Viterbi algorithm. We have shown that with this method, the resulting GD attacks, named Systematic GD (SGD) attacks, on TIPSY, SNOW1, and SNOW2 need less number of guess elements in comparison with the previous known GD attacks. The main advantage of SGD attacks is that while being powerful, they can be designed systematically for any given LFSR-based stream cipher. Using this method, we examine the resistance of SOSEMANUK, a word-oriented stream cipher proposed for the Ecrypt stream cipher project. The complexity of the designed GD attack indicates SOSEMANUK is still alive, having the 128-bit security as the authors claimed. Bio.: Ph.D. Candidate in Dept. of Computer Science, at University of Calgary M.Sc. School of Electrical Engineering, Sharif University of Technology B.Sc. Faculty of Engineering, University of Tehran salam The 24th cryptography seminar will be held on Sunday March 9 (19 esfand) at 4.5 pm. First Speaker : Amin Sakzad Subject : Attack to GGH public key cryptosystem Second Speaker: Alireza Sharifi Subject: Algebraic Attack on Block Ciphers P.S.1: After presentations, Dr. Eghlidos will speak about new group activities in ISSL. P.S.2: You can find Mr Sakzad's paper which his presentation is based on, in the attachment. Best wishes, salam The 22nd cryptography seminar will be held on Sunday February 10 ( 21 bahman) at 4.5 pm. Speaker : Mohammad Heydari Subject : eSTREAM-ECRYPT stream cipher project P.S: Dr Eghlidos will attend in ISSL at 3.5 pm to make cryptography groups in order to begin new cryptographic activities. Best wishes, |