The insecurity of two proxy signcryption schemes: proxy credential forgery attack and how to prevent it
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چکیده
منابع مشابه
Notes on Proxy Signcryption and Multi-proxy Signature Schemes
Proxy signcrytipn scheme allows an original signer to delegate his signing power to a proxy such that the latter can signcrypt a message on behalf of the former. Recently, Lin et al. proposed a proxy signcryption with CCA and CMA security. In this work, we indicate that the Lin et al.’s proxy signcryption scheme does not hold the security of indistinguishability against adaptive chosen-cipherte...
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Con dentiality and authenticity are two of the most fundamental problems in cryptography. Many applications require both condentiality and authenticity, and hence an e cient way to get both together was very desirable. In 1997, Zheng proposed the notion of signcryption , a single primitive which provides both con dentiality and authenticity in a way that's more e cient than signing and encrypti...
متن کاملSecurity Weaknesses in Two Proxy Signature Schemes
Allowing a proxy signer to generate a signature on behalf of an original signer, a proxy signature should satisfy the property of strong unforgeability: anyone except the designated proxy signer cannot create a valid proxy signature on behalf of the original signer. Since proxy signatures, as well as their derivatives, can be used in many applications in reality, such as secure mobile agent, e-...
متن کاملMulti-Proxy Multi-Signcryption Scheme from Pairings
which efficiently combines a multi-proxy multi-signature scheme with a signcryption, is proposed. Its security is analyzed in detail. In our scheme, a proxy signcrypter group could be authorized as a proxy agent by the cooperation of all members in the original signcrypter group. Then the proxy signcryptions can be generated by the cooperation of all the signcrypters in the authorized proxy sig...
متن کاملAn Efficient ID-Based Proxy Signcryption Scheme
Received June 30 th , 2012 Revised July 10 th , 2012 Accepted July 22 th , 2012 Signcryption is a cryptographic primitive that performs encryption and signature in a single logical step, at lower computational cost and communication over heads than the signature-then-encryption. Proxy signcryption schemes are variations of ordinary signcryption schemes and have been useful in many applications ...
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ژورنال
عنوان ژورنال: The Journal of Supercomputing
سال: 2014
ISSN: 0920-8542,1573-0484
DOI: 10.1007/s11227-014-1134-9