A cryptographic key assignment scheme for access control in a hierarchy with exceptions

Research output: Contribution to journalArticle

Abstract

Hierarchy is a critical issue in the access control policy for information protection systems. There are many cryptographic key assignment schemes that were proposed to solve the access control problem in a hierarchy. But some distributed systems need more complex access control policies that can not be expressed in the hierarchy model. Recently, Yeh et al. proposed a cryptographic key assignment scheme, which enforces access control policies in a hierarchy with the transitive and the anti-symmetric exceptions. Unfortunately, in 2000, Hwang has shown that Yeh et al.’s scheme is not secure against a cooperative attack. This article presents a secure cryptographic key assignment scheme for access control policies in a hierarchy with exceptions, which can withstand the Hwang’s cooperative attack. Meanwhile, it also provides an effective and dynamic method to generate, derive and update the secret keys and the public values.

Original languageEnglish
Pages (from-to)121-132
Number of pages12
JournalJournal of Discrete Mathematical Sciences and Cryptography
Volume7
Issue number1
DOIs
Publication statusPublished - 2004 Jan

All Science Journal Classification (ASJC) codes

  • Analysis
  • Algebra and Number Theory
  • Applied Mathematics

Fingerprint Dive into the research topics of 'A cryptographic key assignment scheme for access control in a hierarchy with exceptions'. Together they form a unique fingerprint.

Cite this