# Transmission security

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{{Short description|Component of communications security}}
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'''Transmission security (TRANSEC)''' is the component of communications security ([COMSEC](/source/Communications_security)) that results from the application of measures designed to protect transmissions from interception and exploitation by means other than [cryptanalysis](/source/cryptanalysis). Goals of transmission security include:

* [Low probability of intercept](/source/Low_probability_of_intercept)ion (LPI)
* Low probability of detection (LPD)
* Antijam &mdash; resistance to [jamming](/source/radio_jamming) (EPM or [ECCM](/source/Electronic_counter-countermeasure))
This involves securing communication links from being compromised by techniques like jamming, eavesdropping, and signal interception. TRANSEC includes the use of frequency hopping, spread spectrum and the physical protection of communication links to obscure the patterns of transmission. It is particularly vital in military and government communication systems, where the security of transmitted data is critical to prevent adversaries from gathering intelligence or disrupting operations. TRANSEC is often implemented alongside COMSEC (Communications Security) to form a comprehensive approach to communication security.<ref>{{Cite book |last1=Rodriguez Bejarano |first1=Juan Manuel |last2=Yun |first2=Ana |last3=De La Cuesta |first3=Borja |chapter=Security in IP satellite networks: COMSEC and TRANSEC integration aspects |date=September 2012 |title=2012 6th Advanced Satellite Multimedia Systems Conference (ASMS) and 12th Signal Processing for Space Communications Workshop (SPSC) |chapter-url=http://dx.doi.org/10.1109/asms-spsc.2012.6333089 |publisher=IEEE |pages=281–288 |doi=10.1109/asms-spsc.2012.6333089|isbn=978-1-4673-2676-6 }}</ref>

Methods used to achieve transmission security include [frequency hopping](/source/frequency_hopping) and [spread spectrum](/source/spread_spectrum) where the required [pseudorandom](/source/pseudorandom) sequence generation is controlled by a [cryptographic](/source/cryptographic) algorithm and [key](/source/key_(cryptography)). Such keys are known as '''transmission security keys (TSK)'''. Modern U.S. and [NATO](/source/NATO) TRANSEC-equipped radios include [SINCGARS](/source/SINCGARS) and [HAVE QUICK](/source/HAVE_QUICK).

==See also==
* [Electronic warfare](/source/Electronic_warfare)

==References==
{{Reflist}}

Category:Cryptography
Category:Military communications

{{crypto-stub}}

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Adapted from the Wikipedia article [Transmission security](https://en.wikipedia.org/wiki/Transmission_security) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Transmission_security?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.
