Encryption and Secure Computer Networks
ACM Computing Surveys (CSUR)
Security Mechanisms in High-Level Network Protocols
ACM Computing Surveys (CSUR)
End-to-end arguments in system design
ACM Transactions on Computer Systems (TOCS)
Using encryption for authentication in large networks of computers
Communications of the ACM
Research problems of decentralized systems with largely autonomous nodes
ACM SIGOPS Operating Systems Review
Encryption-based protection for interactive user/computer communication
SIGCOMM '77 Proceedings of the fifth symposium on Data communications
WFS a simple shared file system for a distributed environment
SOSP '79 Proceedings of the seventh ACM symposium on Operating systems principles
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This thesis develops a complete set of protocols, which utilize a block cipher, e.g., the NBS data encryption standard, for protection interactive user-computer communication over physically unsecured channels. The use of the block cipher protects against disclosure of message contents to an intruder, and the protocols provide for the detection of message stream modification and denial of message service by an intruder. The protocols include facilities for key distribution, two-way login authentication, resynchronization following channel disruption, and expedition of high priority messages. The thesis presents designs for modules to implement the protocols, both in the terminal and in a host computer system, and discusses the results of a test implementation of the modules on Multics.