✦ LIBER ✦
New hierarchical assignment without Public Key cryptography
✍ Scribed by Hung-Yu Chien; Jinn-Ke Jan
- Publisher
- Elsevier Science
- Year
- 2003
- Tongue
- English
- Weight
- 124 KB
- Volume
- 22
- Category
- Article
- ISSN
- 0167-4048
No coin nor oath required. For personal study only.
✦ Synopsis
The access privileges in many distributed systems can be effectively organized as a hierarchical tree. Distributing distinct cryptographic keys to distinct entities, according to their privileges, provides a good solution to the hierarchical access control problem. Many existing key assignment schemes use public key cryptography, which requires lots of costly public key operations and thus leads to a limited degree of deployment. In this paper, we shall propose a new key assignment protocol that employs only a low cost smart card with little memory
to perform simple arithmetic operations. Our approach greatly reduces the computational load and the implementation cost. Compared with Lin's scheme, which is a very efficient scheme without using any public key cryptography, our new scheme further reduces the computational cost by as much as 66% and the quantity of public data by 50%.