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Phil Karn (born October 4, 1956) is a reti … Phil Karn (born October 4, 1956) is a retired American engineer from Lutherville, Maryland. He earned a bachelor's degree in electrical engineering from Cornell University in 1978 and a master's degree in electrical engineering from Carnegie Mellon University in 1979. From 1979 until 1984, Karn worked at Bell Labs in Naperville, Illinois, and Murray Hill, New Jersey. From 1984 until 1991, he was with Bell Communications Research in Morristown, New Jersey. From 1991 through to his retirement, he worked at Qualcomm in San Diego, where he specialized in wireless data networking protocols, security, and cryptography. He is currently the President/CEO of Amateur Radio Digital Communications (ARDC), a non-profit foundation funded by the sale of part of its IP address space (44/8). ARDC manages the remaining portion of its address space by providing financial grants to amateur radio and related groups. He has been an active contributor in the Internet Engineering Task Force, especially in security, and to the Internet architecture. He is the author or co-author of at least 6 RFCs, and is cited as contributing to many more. He is the inventor of Karn's Algorithm, a method for calculating the round trip time for IP packet retransmission. In 1991, Thomas Alexander Iannelli's Master's thesis judged Karn's KA9Q NOS software as more suitable for deployment than an Air Force Institute of Technology packet radio system. In 1990, Karn was one of the first to predict that the use of wired links for the Internet's "capillaries" would become "history" because most users would access it via wireless radio links. In 1994, Carl Malamud interviewed Karn on Internet Talk Radio for his "Geek of the Week" podcast. They talked about the KA9Q software, Qualcomm's CDMA radio technology for data transfer, the Globalstar low Earth orbit satellite radio system, Mobile IP, the Clipper chip, and encryption. In June 2014, Karn was also interviewed for the History of the Internet Project, in which he described his contribution to the effort to reboot the 1978 International Sun/Earth Explorer-3 (ISEE-3) spacecraft. The ISEE-3 is also known as the International Cometary Explorer. He is well known in the amateur radio community for his work on the KA9Q Network Operating System (NOS), named after his amateur callsign. He also created early 9600 bit/s FSK radio modems. In the early 2000's, Karn worked to introduce forward error correction into Amateur radio satellites, applying it to the 400 bit/s PSK telemetry from the AO-40 satellite. He won the 1989 Specific Achievement Award at the Dayton Hamvention.chievement Award at the Dayton Hamvention.
, Philip R. Karn (* 4. Oktober 1956 in Balti … Philip R. Karn (* 4. Oktober 1956 in Baltimore) ist ein US-amerikanischer Elektroingenieur. Karn studierte Elektrotechnik an den Universitäten Cornell (Bachelor 1978) und Carnegie Mellon (Master 1979). Danach arbeitete er bis 1991 bei den Bell Laboratories, seither bei Qualcomm in San Diego. Der von ihm entwickelte schätzt die Paketumlaufzeit beim Transmission Control Protocol (TCP) und wurde von der Association for Computing Machinery ausgezeichnet. Daneben hat sich Karn an mehreren Request for Comments beteiligt. Er schrieb auch die -Software, die zur seriellen Datenübertragung verwendet wird, und implementierte für die Telemetrie bei den Amateurfunksatelliten OSCAR 40 und ARISSat-1 ein neues Übertragungsverfahren mit Vorwärtsfehlerkorrektur. In den 1990er Jahren klagte er gegen die amerikanischen ITAR-Exportrestriktionen für die Quellcodes der Programme, die im Buch Applied Cryptography von Bruce Schneier publiziert worden sind. Die Restriktionen wurden während des Verfahrens von Präsident Bill Clinton aufgehoben. Karn ist Funkamateur mit dem Rufzeichen KA9Q.n ist Funkamateur mit dem Rufzeichen KA9Q.
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Phil Karn (born October 4, 1956) is a reti … Phil Karn (born October 4, 1956) is a retired American engineer from Lutherville, Maryland. He earned a bachelor's degree in electrical engineering from Cornell University in 1978 and a master's degree in electrical engineering from Carnegie Mellon University in 1979. From 1979 until 1984, Karn worked at Bell Labs in Naperville, Illinois, and Murray Hill, New Jersey. From 1984 until 1991, he was with Bell Communications Research in Morristown, New Jersey. From 1991 through to his retirement, he worked at Qualcomm in San Diego, where he specialized in wireless data networking protocols, security, and cryptography.ing protocols, security, and cryptography.
, Philip R. Karn (* 4. Oktober 1956 in Balti … Philip R. Karn (* 4. Oktober 1956 in Baltimore) ist ein US-amerikanischer Elektroingenieur. Karn studierte Elektrotechnik an den Universitäten Cornell (Bachelor 1978) und Carnegie Mellon (Master 1979). Danach arbeitete er bis 1991 bei den Bell Laboratories, seither bei Qualcomm in San Diego. In den 1990er Jahren klagte er gegen die amerikanischen ITAR-Exportrestriktionen für die Quellcodes der Programme, die im Buch Applied Cryptography von Bruce Schneier publiziert worden sind. Die Restriktionen wurden während des Verfahrens von Präsident Bill Clinton aufgehoben.ens von Präsident Bill Clinton aufgehoben.
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Phil Karn
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