By Mitsuru Matsui (auth.), Yvo G. Desmedt (eds.)

The CRYPTO ’94 convention is subsidized by way of the foreign organization for Cryptologic learn (IACR), in co-operation with the IEEE laptop Society Technical Committee on safeguard and privateness. It has taken position on the Univ- sity of California, Santa Barbara, from August 21-25,1994. this is often the fourteenth annual CRYPTO convention, all of which were held at UCSB. this can be the 1st time that complaints can be found on the convention. the final Chair, Jimmy R. Upton has been answerable for neighborhood association, registration, and so on. there have been 114 submitted papers that have been thought of by means of this system Committee. of those, 1 was once withdrawn and 38 have been chosen for the proce- ings. There also are three invited talks. of those are on features of cryptog- phy within the advertisement global. the single on features should be awarded by means of David Maher (AT&T), the single on software program elements via Joseph Pato (Hewlett- Packard). there'll even be a panel dialogue on “Securing an digital international: Are We Ready?” The panel contributors could be: Ross Anderson, Bob Blakley, Matt Blaze, George Davida, Yvo Desmedt (moderator), Whitfield Diffie, Joan Feig- baum, Blake Greenlee, Martin Hellman, David Maher, Miles Smid. the subject of the panel may be brought through the invited speak of Whitfield Diffie on ”Securing the knowledge road. ” those court cases comprise revised types of the 38 contributed talks. each one i paper used to be despatched to a minimum of three contributors of this system committee for comments.

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Yalnagishi. A n e w method for known plaintext attack of FEAL cipher. A. ttueppel, editor, Advorzces in (Iryptology Eurocrypt ’92, pages 81-91, Springer-Verlag, Berlin, 1992. 7. National Institute of Standards and Technology (NIST). FIPS Publzcalzorz 4 6 % : Dutu Encryption Standard. December 30, 1993. Originally issued by National Bureau of Standards. 8. I,. C)’Conner. On the distribution of characteristics in bijective mappings. In T. ^ it2 Cryplytology -- Eurocrypt ’93, pages 360-370, Springer-Verlag: Berlin, 1994.

Kk,, We shall write Pi, @ . . @ Pi, as P [ x p ]and we can write a single linear approximation as + If equation 1 is correct with probability p = $ t for randomly chosen plaintext and a fixed key, then we say that it has baas t . iphertext pairs the cryptanalyst can make a guess for the value of K [ X K ] ;provided 6 # 0 the guess becomes more reliable as the cryptanalyst collects more plaintext/ciphertext pairs. We note that the expected value of the left side will be t if K [ [ x K = ] 1 and - E if K [ X K ]= 0.

It is reasonable t o assume that these results would extend to a larger scale. We used a five-round version of DES with two linear approximations identified using the notation in [5] as -ACD- and -DCA-. Each linear approximation 33 holds with bias c = 25 x 2-12 6,104 x lod3. Let Ji'i denote the 48-bit subkey used a t round i , PL the low 32 bits of plaintext and C,'L the low 3 2 bits of ciphertext. Then we have 18,241 = K2['22] @ K:3[44]@ K 4 [ 2 2 ] P2 : P,5[7, 18,241 @ C : L [ ~18,24,29] , = Ii'2[22] cf3 K3[44] @ A'4[22] Pi : Pb[7, 18,24,Z9] & C:,5[7, First we consider Assumption 1.

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