Narn-Yih-Lee and Tzonelih Hwang
Institute of Information Engineering
National Cheng Kung University
Tainan, Taiwan, R.O.C.
A new scheme for dynamic access control in a hierarchy is proposed based on the sibling intractable function family (SIFF in short) which was invented by Zheng et al. in 1991. We show the advantages of the new scheme in controlling dynamic access and also point out problems in real implementation.
Keywords: access control, cryptographic key, one-way function, sibling intractable function families, user hierarchy
Received January 20, 1994; revised September 14, 1994.
Communicated by Jin-Fu Chang.