Efficient and Scalable Hierarchical Key Assignment Scheme
نویسندگان
چکیده
The access privileges in distributed systems are often organized as a hierarchy structure. Chien and Jan proposed an efficient hierarchical key assignment scheme without using the public key cryptosystem in 2003. Nevertheless, their scheme must use the smart card and the information published on the public board contains the essential secrets of the server and the corresponding users. We therefore propose a novel hierarchical key assignment scheme which can preserve the advantages of Chien and Jan’s scheme without adopting the smart card. Moreover, even legal entities can not use the public information announced on the authenticated board to derive the secret keys of other members. Key-Words: Hierarchical Key Assignment, Time-bound Property, Scalability, Efficiency
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