PROGRAM EUROCRYPT'93, MAY 23-27, LOFTHUS, NORWAY
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General chair : Kaare Presttun 
                email: eurocrypt93@alcatel.no                

Program chair : Tor Helleseth
                Department of Informatics 
                University of Bergen
                N-5020 Bergen
                NORWAY
                email: torh@ii.uib.no

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                      MONDAY,  May 24
                      ---------------
                 
              SESSION 1 : AUTHENTICATION
              --------------------------
              Chair: J. Seberry

 9.00- 9.30   Welcome and opening remarks
 9.30-10.00   On the Relation Between A-codes and Codes Correcting Independent 
              Errors, T. Johansson, B. Smeets (Lund University, Sweden), 
              and G. Kabatianskii (Institute for Problems of Information 
              Transmission, Russia)
10.00-10.20   Optimal Authentication Systems, R. Safavi-Naini and L. Tombak 
              (University of Wollongong, Australia)

10.20-10.50   Coffee or tea


              SESSION 2 : PUBLIC KEY
              ----------------------
              Chair: A. Odlyzko

10.50-11.10   Factoring Integers using SIMD Sieves, B. Dixon (Princeton 
              University, USA) and A.K. Lenstra (Bellcore, USA)
11.10-11.30   A New Elliptic Curve Based Analogue of RSA, 
              N. Demytko (Telecom Research Laboratories, Australia)
11.30-11.50   Weaknesses of a Public-Key Cryptosystem Based on Factorization 
              of Finite Groups, J. Stern (ENS, France)

11.50-14.00   Lunch


              SESSION 3 : BLOCK CIPHERS
              -------------------------
              Chair: A. De Santis

14.00-14.20   Differentially Uniform Mappings for Cryptography, 
              K. Nyberg (Technical University of Vienna, Austria)
14.20-14.40   On Permutations Against Differential Cryptanalysis, 
              T. Beth and C. Ding (EISS, University of Karlsruhe, Germany)
14.40-15.10   Two New Classes of Bent Functions, 
              C. Carlet (INRIA, France)
15.10-15.30   Boolean Functions Satisfying a Higher Order Strict Avalanche
              Condition, T.W. Cusick (SUNY, Buffalo, USA)

15.30-16.00   Coffee or tea


              SESSION 4 : SECRET SHARING
              --------------------------
              Chair: Y. Desmedt

16.00-16.30  Size of Shares and Probability of Cheating in Threshold Schemes, 
             M. Carpentieri, A. De Santis and U. Vaccaro (University of 
             Salerno, Italy)
16.30-17.00  Nonperfect Secret Sharing Schemes and Matroids, K. Kurosawa,
             K. Okada, K. Sakano, W. Ogata and S. Tsujii (Tokyo Institute of
             Technology, Japan)
     

                      TUESDAY, May 25
                      ---------------

             SESSION 5 : STREAMCIPHERS I
             ---------------------------
             Chair: T. Helleseth 

 9.00-10.00 From the Memoars of a Norwegian Cryptolog, E. Selmer (University 
            of Bergen, Norway) (Invited talk)
10.00-10.20 On the Linear Complexity of Products of Shift-Register Sequences, 
            R. Gottfert and H. Niderreiter (Austrian Academy of Sciences, 
            Vienna, Austria)

10.20-10.50 Coffee or tea


             SESSION 6 : STREAMCIPHERS II
             ----------------------------
             Chair: D. Gollman

10.50-11.20  Resynchronisation Weaknesses in Synchronous Stream Ciphers,
             J. Daemen, R. Govaerts and J. Vandewalle (ESAT, KU Leuven, 
             Belgium)
11.20-11.40  Blind Synchronization of m-Sequences with Even Span,
             R. Games and J.J. Rushanan (MITRE, USA)
11.40-12.10  On Constructions and Nonlinearity of Correlation Immune Functions,
             J. Seberry, X. Zhang and Y. Zheng (University of Wollongong, 
             Australia)

12.10-14.00  Lunch


             SESSION 7 : DIGITAL SIGNATURES
             ------------------------------
             Chair: C. Schnorr

14.00-14.30  Practical and Provable Secure Release of a Secret and Exchange of
             Signatures, I.B. Damgard (Aarhus University, Denmark)
14.30-14.50  Subliminal Communication is Easy Using the DSA, 
             G.J. Simmons
14.50-15.10  Can OSS be Repaired, D. Naccache (Gemplus, France)

15.10-15.40  Coffee or tea


             SESSION 8 : PROTOCOLS I
             -----------------------
             Chair: K. Kurosawa

15.40-16.00  Limitations of Logical Analysis of Cryptographic Protocols,  
             C. Boyd and W. Mao (University of Manchester, United Kingdom)
16.00-16.30  Practical Anonymous and Secure Voting Scheme, K. Itoh, C. Park 
             and K. Kurosawa (Tokyo Institute of Technology, Japan)
16.30-16.50  Untransferable Rights in a Client-Independent Server Environment,
             J. Domingo-Ferrer (University of Barcelona, Spain)
16.50-17.20  Interactive Hashing Simplifies Zero-Knowledge Protocol Design,
             R. Ostrovsky (UC Berkeley, USA), R. Venkatesan (Bellcore, USA) and
             M. Yung (IBM T. Watson, USA)

             RUMP SESSION
             -------------
             Chair: I. Ingemarsson     

20.00-24.00  Accepted paper: 
             Security in Digital Mobile Communication Systems,
             C. Park, K. Kurosawa, T. Okamoto and S. Tsujii (Tokyo
             Institute of Technology, Japan)


                     WEDNESDAY, May 26
                     -----------------

             SESSION 9 : HASH FUNCTIONS
             ---------------------------
             Chair: B. Preneel

 9.00- 9.20  One-Way Accumulators: A Decentralized Alternative to Digital
             Signatures, J. Benaloh and M. de Mare (Clarkson University, USA)
 9.20- 9.40  Some Attacks on the ARL Hash Function, I.B. Damgard and 
             L.R. Knudsen (Aarhus University, Denmark)
 9.40-10.10  Collisions for the Compression Function of MD5, B. den Boer and
             A. Bosselaers (ESAT, KU Leuven, Belgium)
10.10-10.30  How to Find and Avoid Collisions for the Knapsack Hash Function, 
             J. Patarin (Bull CP8, France)
  
10.30-11.00  Coffee or tea


             SESSION 10: PAYMENT SYSTEMS
             ---------------------------
             Chair: I.B. Damgard

11.00-11.20  Single Term Off-Line Coins, N.T. Ferguson (CWI Amsterdam,
             The Netherlands)
11.20-11.40  Improved Privacy in Wallets with Observers,
             R.J.F. Cramer (CWI Amsterdam, The Netherlands) and 
             T.P. Pedersen (Aarhus University, Denmark)
11.40-12.10  How to Prevent the Mafia Fraud Using Distance-Bounding Protocols,
             S. Brands and D. Chaum (CWI Amsterdam, The Netherlands)
           
12.10-14.00 Lunch
 

             SESSION 11: CRYPTANALYSIS
             --------------------------
             Chair: G.J. Simmons

14.00-14.20 On the Distribution of Characteristics in Bijective Mappings,
            L. O'Connor (University of Waterloo, Canada)
14.20-14.40 On the Security of the IDEA Block Cipher, 
            W. Meier (HTL, Switzerland)
14.40-15.10 Linear Cryptanalysis Method for DES Cipher,
            M. Matsui (Mitsubishi, Japan)
15.10-15.40 New Types of Cryptanalytic Attacks Using Related Keys, 
            E. Biham (Technion, Israel)

15.40-16.10 Coffee or tea
 

             SESSION 12 : PROTOCOLS II
             -------------------------
             Chair: P. Landrock

16.10-16.40  Reconciliation on a Secret Key Through Public Discussion,
             G. Brassard and L. Salvail (University of Montreal, Canada)
16.40-17.10  Global, Unpredictable Bit Generation Without Broadcast,
             D. Beaver and N. So (Penn State University, USA)
17.10-17.40  IACR Business meeting

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