Phil Karn

Phil Karn, born October 4, 1956, is an engineer from . He earned a bachelor’s degree in from in 1978 and a master’s degree in electrical engineering from in 1979. From 1979 until 1984, Phil Karn worked at in , and . From 1984 until 1991, he was with Bell Communications Research in . Since 1991 he has been with in , where he specializes in wireless data networking protocols, security, and cryptography.

He has been an active contributor in the , especially in security, but is also a strong contributor to the architecture. His name is on at least 6 . He is the inventor of , a method for calculating the round trip time for IP packet retransmission.

He is well known in the amateur radio community for his work on the (NOS), named after his amateur , early 9600 bit/s FSK radio modems, and more recently, the introduction of forward error correction (FEC) into the , with FEC applied to the 400 bit/s PSK telemetry from the now-defunct satellite.

In June 2014, Phil Karn was interviewed for the History of the Internet Project (HOTI). Phil Karn describes his contribution to the effort to reboot the 1978 International Sun/Earth Explorer-3 (). The #ISEE-3 is also known as the International Cometary Explorer.

Crypto export lawsuit

In 1994, the US State Department Office of Defense Trade Control ruled that while it was legal to export Bruce Schneier‘s “Applied Cryptography” book under the rules for munitions export, it was illegal to export the source code in the book on electronic media such as a .

Phil Karn challenged this ruling, both in the courts and in testimony before Congress, and the case dragged on for years, until dropped almost all export controls on freely available crypto source code on January 14, 2000; The judge mooted the case, resulting in no decision and no precedent.


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