This cypherpunk is a researcher in the field of secure systems.

In November 1993, he presented a report on the project "A cryptographic file system for Unix", which was very useful to cypher banks.

In the early 1990s, at the height of the "crypto war", he joined the Cypherpunks newsletter list and in 1994 discovered a critical weakness in the mechanisms of wiretapping in the Clipper chip.