Title: Writing, Supporting, and Evaluating Tripwire: A Publically
Available Security Tool 
Authors: Gene H. Kim  Eugene H. Spafford  
File name: pubCOASTTripwireTripwire-appdev.ps.Z 
File size: 37417 bytes 

Abstract: This paper begins with brief overview of what
Tripwire does and how it works.  It discuss how certain
implementation decisions affected the course of Tripwire
development, also presents other applications that have been
found for Tripwire.