139 search results - page 2 / 28 » On the Security of Two Key-Updating Signature Schemes |
INFORMATICALT
2000
13 years 4 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...
SCN
2010
Springer
13 years 3 months ago
2010
Springer
Abstract. This paper shows some efficient and provably-secure convertible undeniable signature schemes (with both selective conversion and all conversion), in the standard model an...
ISW
1999
Springer
13 years 9 months ago
1999
Springer
Abstract. Group signature schemes allow a group member to anonymously sign on group’s behalf. Moreover, in case of anonymity misuse, a group authority can recover the issuer of a...
PKC
2012
Springer
11 years 7 months ago
2012
Springer
We revisit the definition of unforgeability of blind signatures as proposed by Pointcheval and Stern (Journal of Cryptology 2000). Surprisingly, we show that this established de...
AINA
2003
IEEE
13 years 8 months ago
2003
IEEE
In 1994, Harn proposed a signature scheme based on the modified ElGamal's scheme and claimed that the security relies on both of the factorization and the discrete logarithm....