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- -- withdrawn --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- 2012-05-31: withdrawn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
-
CC BY