Advances in Cryptology — EUROCRYPT’ 92: Workshop on the by C. Blundo, A. De Santis, D. R. Stinson, U. Vaccaro (auth.),

By C. Blundo, A. De Santis, D. R. Stinson, U. Vaccaro (auth.), Rainer A. Rueppel (eds.)

A sequence of workshops dedicated to glossy cryptography all started in Santa Barbara,California in 1981 and used to be in 1982 via a ecu counterpart in Burg Feuerstein, Germany. The sequence has been maintained with summer time conferences in Santa Barbara and spring conferences someplace in Europe. on the 1983 assembly in Santa Barbara the foreign organization for Cryptologic learn was once introduced and it now sponsors the entire conferences of the sequence. This quantity offers the complaints of Eurocrypt '92, held in Hungary. The papers are prepared into the subsequent elements: mystery sharing, Hash capabilities, Block ciphers, move ciphers, Public key I, Factoring, Trapdoor primes and moduli (panel report), Public key II, Pseudo-random permutation turbines, Complexity idea and cryptography I, Zero-knowledge, electronic wisdom and digital funds, Complexity thought andcryptography II, purposes, and chosen papers from the rump consultation. Following the culture of the sequence, the authors produced complete papers after the assembly, from time to time with revisions.

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Additional info for Advances in Cryptology — EUROCRYPT’ 92: Workshop on the Theory and Application of Cryptographic Techniques Balatonfüred, Hungary, May 24–28, 1992 Proceedings

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Communication theory of secrecy systems. Bell Syslein T e c h . , 28, pp. 656-715, October 1949. [16]G. J. Simmons, W. Jackson, and K. Martin. The geometry o f shared secret schemes. BullctiiL o j llie inslilute o j Cornbinutorics aizd its Applicatioiis, 1,pp. 7i-a8,1991. 1171 D. R. Stinson and S . A. Vanstone. A combinatorial approach to threshold schemes. SIAM Journal o n Discrete MutAeinatics, 1(2), pp. 230-236, 1988. T. Hashing is not Collision-free T. BARITAUD * , H. GILBERT * , M. GIRAULT ** (*) CNET PAAITSAISRC 38 - 40.

Xa(~(2/ - 2)) = $i,c,,yA((X . g ) . ) is a group. 0 1x1 A monotone access struclui-c satisfies the property that when a set of shareholders B can recompute a secret then any superset B' 2 B can also recompute t h e secret. Careful examination of t h e above proof indicates the following. ) lo K(*). Classification Due t o [ll],in any threshold scheme there is t h e following bound on 1: [MAX I 1x1+ t - 2. Theorem 1 can be used t o find a bound for I M A X for ideal homomorphic threshold schemes.

Such a rccursive construction of hash functions has been called thc “meta-method” by Merkle [13],see also 14, 151. For messagc data whose total length in bits is not a multiple of 1, one can apply deterministic “padding” [T, 131 to the message to be hashed by (1) to increase the total lcngth to a multiplc of 1. t For iterated hash functions, wc distinguish the following five attacks: 1. Target attack: Given Ho and A l l find A{‘ such that M’ # M but Hash(f10, M’) = Ilah(llo,M ) . 2. Free-start t a r g e t a t t a c k : Given IZ, a n d hi, findIIA and 111‘such that (Hh, M‘) # (&, M) but HaSh(ll~,M’)= H a h ( l l o , M).

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