Deze lezing zal in het Nederlands worden gegegeven! This presentation will be in Dutch! The content of the presentation is inspired by the author's recent work on computer forensic analysis. In everyday experience it is all too easy to lose computer information by accident. With forensic analysis one finds that information can be more difficult to destroy than expected. The paradox of persistence and volatility is one of the topics that will be discussed.

Wietse Venema is the author of famous and notorious software such as the TCP Wrapper, the Postfix mail system, and, co-authored with Dan Farmer, SATAN and the recently released Coroner's Toolkit for computer forensic analysis. After an education in physics in Groningen and after a transformation into computing science in Eindhoven, Wietse now is a research staff member at IBM in the USA.