Poul-Henning Kamp
Encyclopedia
FreeBSD
FreeBSD is a free Unix-like operating system descended from AT&T UNIX via BSD UNIX. Although for legal reasons FreeBSD cannot be called “UNIX”, as the direct descendant of BSD UNIX , FreeBSD’s internals and system APIs are UNIX-compliant...
developer, responsible for implementation of the widely used MD5
MD5
The MD5 Message-Digest Algorithm is a widely used cryptographic hash function that produces a 128-bit hash value. Specified in RFC 1321, MD5 has been employed in a wide variety of security applications, and is also commonly used to check data integrity...
password hash algorithm
Crypt (Unix)
In Unix computing, crypt is the name of both a utility program and a C programming function. Though both are used for encrypting data, they are otherwise essentially unrelated...
, a vast quantity of systems code, including the FreeBSD GEOM storage layer, GBDE
GBDE
GBDE, standing for GEOM Based Disk Encryption, is a block device-layer disk encryption system written for FreeBSD, initially introduced in version 5.0. It is based on the GEOM disk framework. GBDE was designed and implemented by Poul-Henning Kamp and Network Associates Inc...
cryptographic storage transform, part of the UFS2 file system implementation, FreeBSD Jail
FreeBSD Jail
The FreeBSD jail mechanism is an implementation of operating system-level virtualization that allows administrators to partition a FreeBSD-based computer system into several independent mini-systems called jails....
s, malloc
Malloc
C dynamic memory allocation refers to performing dynamic memory allocation in the C via a group of functions in the C standard library, namely malloc, realloc, calloc and free....
library, clock/time code, and the Beerware
Beerware
Beerware is a somewhat tongue-in-cheek term for software released under a very relaxed license. It provides the end user with the right to use a particular program .-Description:...
license.
His dispute with electronics manufacturer D-Link
D-Link
D-Link Corporation was founded in June 1986 in Taipei as Datex Systems Inc. It began as a network adapter vendor and has gone on to become a designer, developer, and manufacturer of networking solutions for both the consumer and business markets.In 2007, it was the leading networking company in...
in which he claimed they were committing NTP vandalism was resolved on 27 April 2006.
He is the lead architect and developer for the Varnish cache
Varnish cache
Varnish is an HTTP accelerator designed for content-heavy dynamic web sites. In contrast to other HTTP accelerators, such as Squid, which began life as a client-side cache, or Apache and nginx, which are primarily origin servers, Varnish was designed from the ground up as an HTTP accelerator...
project.
A post by Poul-Henning is responsible for the widespread use of the term bikeshed colour to describe contentious but otherwise meaningless technical debates over trivialities in open source projects. This term is in use in, among others, the FreeBSD
FreeBSD
FreeBSD is a free Unix-like operating system descended from AT&T UNIX via BSD UNIX. Although for legal reasons FreeBSD cannot be called “UNIX”, as the direct descendant of BSD UNIX , FreeBSD’s internals and system APIs are UNIX-compliant...
Project, the Perl
Perl
Perl is a high-level, general-purpose, interpreted, dynamic programming language. Perl was originally developed by Larry Wall in 1987 as a general-purpose Unix scripting language to make report processing easier. Since then, it has undergone many changes and revisions and become widely popular...
Project, and the Subversion Project.
Publications
A selection of publications:- USENIX ATC 1998 FREENIX track, "malloc(3) Revisited"
- USENIX BSDCon 2003, GBDE-GEOM Based Disk Encryption
- USENIX BSDCon 2002, Rethinking /dev and devices in the UNIX kernel
- ACM Queue: Building Systems to be Shared Securely