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BIT Numerical Mathematics

, Volume 33, Issue 1, pp 46–56 | Cite as

An optimal algorithm to assign cryptographic keys in a tree structure for access control

  • Horng-Twu Liaw
  • Chin-Laung Lei
Part I Computer Science

Abstract

In a computer communication system, there exists a possibility of two or more users collaborating to derive a key to which they are not entitled. Therefore, a method for ensuring the system is necessary. In this paper, we propose an efficient heuristic algorithm for assigning cryptographic keys among a group of users organized in a tree structure. Comparing with the existing assignment schemes, our scheme always produces economic cryptographic keys, which are smaller than the keys generated by the previous work in a tree structure.

CR Categories

D.4.6 

Keywords

Cryptographic key tree structure access control 

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Copyright information

© BIT Foundations 1993

Authors and Affiliations

  • Horng-Twu Liaw
    • 1
  • Chin-Laung Lei
    • 1
  1. 1.Department of Electrical EngineeringNational Taiwan UniversityTaipeiTaiwan 106, R.O.C.

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