106 search results - page 18 / 22 » Cryptanalysis of Koyama Scheme |
PKC
2010
Springer
14 years 2 months ago
2010
Springer
Abstract. In this paper, we fully break the Algebraic Surface Cryptosystem (ASC for short) proposed at PKC’2009 [3]. This system is based on an unusual problem in multivariate cr...
ISCAS
2008
IEEE
14 years 5 months ago
2008
IEEE
— Recently four chaos-based image encryption schemes were proposed. Essentially, the four schemes can be classified into one class, which is composed of two basic parts: permuta...
IJACT
2008
13 years 11 months ago
2008
: In Crypto 1997, Goldreich, Goldwasser and Halevi (GGH) proposed a lattice analogue of McEliece public key cryptosystem, in which security is related to the hardness of approximat...
INFORMATICALT
2000
13 years 10 months ago
2000
In the (t, n) proxy signature scheme, the signature, originally signed by a signer, can be signed by t or more proxy signers out of a proxy group of n members. Recently, an efficie...
CTRSA
2010
Springer
14 years 5 months ago
2010
Springer
Sanitizable signature schemes allow a semi-trusted entity to modify some specific portions of a signed message while keeping a valid signature of the original off-line signer. In...