Accession Number : ADA103371


Title :   Secure Reliable Processing Systems


Descriptive Note : Semi-annual technical rept. 1 Jul 1979-30 Jun 1981


Corporate Author : CALIFORNIA UNIV LOS ANGELES DEPT OF COMPUTER SCIENCE


Personal Author(s) : Popek, Gerald J


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA103371


Report Date : Jul 1981


Pagination or Media Count : 220


Abstract : These current contract activities are discussed: Operating Systems and Applications Security, Network Security, and Reliable Distributed Systems Architectures. In the included dissertation, (Data Security: Operating Systems and Computer Networks), the concept of data security is explained and a formal model of its meaning is presented. The UCLA Data Secure Unix Operating System is then described and the model is used to demonstrate, rather intuitively, that the system is indeed secure. The dissertation explains why such clear and intuitive demonstrations of security are a necessary complement to the more complex and formal approaches of others. The dissertation also examines issues of providing data security in computer networks. Those networks add additional complexity to the data security problem which is solved by the use of encryption. The dissertation explains how encryption can best be integrated into networks, and examines the tradeoffs in using conventional or public-key based encryption algorithms. The emerging issue of digital signatures is also discussed, and several possible implementations are presented. One rather surprising and important conclusion is that for most network security problems, conventional or public-key based encryption systems appear to be equivalent.


Descriptors :   *DATA PROCESSING SECURITY , COMMUNICATIONS NETWORKS , COMPUTER ARCHITECTURE , COMPUTER COMMUNICATIONS , CRYPTOGRAPHY , DATA BASES , DATA MANAGEMENT , EXECUTIVE ROUTINES , MAN COMPUTER INTERFACE , MULTIPROCESSORS , RELIABILITY , SECURE COMMUNICATIONS


Subject Categories : Computer Programming and Software
      Computer Hardware
      Computer Systems


Distribution Statement : APPROVED FOR PUBLIC RELEASE