Trusted Information Systems

Prospectus Summary

The following summary is qualified in its entirety by, and should be read in conjunction with, the more detailed information and financial statements included elsewhere in this Prospectus. As used herein, the terms "Company" and "TIS," unless otherwise indicated, refer to Trusted Information Systems, Inc. and its subsidiary. Except as otherwise noted or the context otherwise requires, all information in this Prospectus (i) assumes no exercise of the Underwriters' over-allotment option and (ii) reflects a 40-for-1 stock split of the Common Stock effected as of May 31, 1996 in connection with the reincorporation of the Company in Delaware.