Date of Award

Spring 1988

Degree Type

Thesis - Restricted

Degree Name

Master of Science (MS)


Mathematics, Statistics and Computer Science

First Advisor

Harris, Douglas

Second Advisor

Barnard, Mark

Third Advisor

Slattery, Michael C.


In untrusted and trusted computing environments, the problem of secure file transfer between various systems can have many solutions. Most operating systems implement some type of security and authorization checking; however, security mechanisms are rarely implemented in file transfer protocols. Furthermore, little research has been done on the topic of secure file transfer. The July 31, 1987, publication of the Trusted Network Interpretation of the Trusted Computer System Evaluation criteria will foster more research on this topic. Most of the research presented in this thesis was accomplished at the Milwaukee School of Engineering (MSOE). The secure file transfer development and testing was done on the HONEYWELL 16-bit Secure COMunications Processor (SCOMP). The file transfer utility SCOMPKERM is being used on SCOMP systems throughout the united States of America and Canada. The terminal emulation utility DG_CONNECT developed in conjunction with programmers at Honeywell Federal Systems was used as a benchmark for the Canadian Government.