Felix von Leitner
German security consultant and programmer, known as "Fefe", whose blog has been one of Germany's most widely read since 2005.
On the technical side he is best known for dietlibc, a tiny C library for building small static binaries, the gatling web server and the libowfat library. All of it rests on the same conviction: less code means fewer bugs and a smaller attack surface.
Fefes Blog consists of short, frequently acerbic posts on security holes, politics and surveillance, with no comment section. He has long been a recurring voice around the Chaos Computer Club and speaks at its congresses. His low opinion of the security product industry is about as well known as the blog itself.