Poul-Henning Kamp () is a Danish computer software developer known for work on various projects including FreeBSD and Vinyl Cache. He currently resides in Slagelse, Denmark.
Involvement in the FreeBSD project
Poul-Henning Kamp has been committing to the FreeBSD project for most of its duration. He is responsible for the widely used MD5crypt implementation of the MD5-based password hash algorithm,
a vast quantity of systems code including the FreeBSD GEOM storage layer, GBDE cryptographic storage transform, part of the UFS2 file system implementation, FreeBSD Jails, the implementation of the malloc library call, and the FreeBSD and NTP timecounters code, and the interface with David Mills.
Vinyl Cache
He is the lead architect and developer for the open source Vinyl Cache project (formerly Varnish Cache), an HTTP accelerator.
Dispute with D-Link
In 2006, Kamp had a dispute with electronics manufacturer D-Link in which he claimed they were committing NTP vandalism by embedding the IP address of his NTP servers in their routers. The dispute was resolved in April 2006.