Modifying YCN key assignment scheme to resist the attack from Hwang

Jyh Haw Yeh, Marion Scheepers, Wen Chen Hu

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A modified YCN cryptographic key assignment scheme for resistance against the attack from Hwang is discussed. Hwang's attack is a collusive attack where a set of classes H = {C1, C2,..., Cn} collusively derive another class Cl's key, but none of the classes in H is allowed to access Cl. It is found that the YCN scheme is not only secure against Hwang's attack but become more efficient on assigning the prime numbers. A method to protect another possible attack, tansitive key-derivation, is also discussed.

Original languageEnglish
Pages (from-to)435-440
Number of pages6
JournalInformation Processing Letters
Volume95
Issue number4
DOIs
StatePublished - 31 Aug 2005

Keywords

  • Cryptography
  • Data access control
  • Hierarchy with exceptions

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