无完全可信PKG身份签名的分层CES方案

J4 ›› 2012, Vol. 47 ›› Issue (9): 7-14.

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Scheme of hierarchical content extraction signature based on non-credible PKG identity-based signature

JING Xu^1,2,3, HE Dong-jian^1*

1.College of Mechanical and Electronic Engineering, Northwest A ＆ F University, Yangling 712100, Shaanxi, China;
2. College of Information Engineering, Northwest A ＆ F University, Yangling 712100, Shaanxi, China;
3. Hangzhou Key Lab of EBusiness and Information Security, Hangzhou Normal University,
Hangzhou 310036, Zhejiang, China

Received:2012-07-03 Online:2012-09-20 Published:2012-09-24

Abstract

Abstract:

To meet the requirement of privacy protection in doing hierarchical business after signing the whole one in management-type software as a service application, a scheme of hierarchical content extraction signature was proposed based on the identity-based signature of non-credible private key generator. The extraction of both fragment and signature was in control by the hierarchical extraction policy. The complexity of certificate in public key infrastructure was avoided based on the identity-based signature. In some extent, the noncredible private key generator problem was weakened whose part independently generated by service provider and tenant. The analyzing results show that the scheme has the specialties of user’s private key’s privacy, un-forge and privacy of CES. It can be applied to online office and book sale.

Key words: software as a service application; content extraction signature; hierarchical extraction; identity-based signature; privacy protection