Improved Secret Sharing with Access Structures in a Hierarchy

Author

Liu, Yi ; Zhang, Ling ; Wang, Yumin

Author_Institution

Guangdong Key Lab. of Comput. Network, South China Univ. of Technol., Guangzhou

fYear

2006

fDate

Dec. 2006

Firstpage

18

Lastpage

25

Abstract

In 2004, Chang et al. presented an approach firstly to solve the problem of secret sharing with access structures in a hierarchy. After that, based on one way hash function, another proposed scheme was suggested by Lin et al. However, there is the same drawback in both schemes. When group secret keys need to be changed, the trust authority has to update related parameters of each branch in both the above schemes. In this paper, using discrete logarithm, an improved secret sharing with access structures in a hierarchy is given. It can achieve the property that related parameters do not have to update even if group secret keys are altered. So, the presented scheme may be more suitable for applications

Keywords

private key cryptography; access structures; discrete logarithm; group secret keys; hash function; secret sharing; Access control; Computer networks; Cryptography; Laboratories; Network servers; Permission; Security; access structures; discrete logarithm; hierarchy; secret sharing;

fLanguage

English

Publisher

ieee

Conference_Titel

Services Computing, 2006. APSCC '06. IEEE Asia-Pacific Conference on

Conference_Location

Guangzhou, Guangdong

Print_ISBN

0-7695-2751-5

Type

conf

DOI

10.1109/APSCC.2006.66

Filename

4041206