Paper 2012/271

Homomorphic Signature for Identity Authentication in Cloud Computing

Zhiwei Wang, Guozi Sun, and Danwei Chen

Abstract

In this paper, we introduce a new kind of homomorphic signature, which is suitable for identity authentication in cloud computing. User firstly gives his full signature (involves all his identity attributes) to the identity authentication server. During the valid period of his full signature, if the user wants to require a cloud service on a special identity (only involves part of identity attributes), he only needs to secretly send a $\{0,1\}^n$ vector to the identity authentication server. The identity authentication server who doesn't know the secret key can compute the partial signature on the special identity, and then signs it to the cloud server. We give a formal secure definition of this homomorphic signature, and construct a scheme from GHR signature. We prove that our scheme is secure under strong RSA assumption.

Metadata
Available format(s)
-- withdrawn --
Category
Cryptographic protocols
Publication info
Published elsewhere. Unknown where it was published
Keywords
homomorphic signatureidentity authenticationcloud computingGHR signaturestrong RSA assumption
Contact author(s)
zhwwang @ njupt edu cn
History
2012-05-31: withdrawn
2012-05-29: received
See all versions
Short URL
https://ia.cr/2012/271
License
Creative Commons Attribution
CC BY
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