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{{short description|Class of communications devices}}
{{Redirect|BITW|the wrestling term|Best in the World (disambiguation){{!}}Best in the World}}
'''Bump-in-the-wire''' ('''BITW''') is a class of communications devices which can be inserted into existing (legacy) systems to enhance the integrity, confidentiality, or reliability of communications across an existing logical link without altering the communications endpoints.<ref name="RFC 4301">{{cite journal|last1=Kent|first1=S. |title=RFC 4301 - Security Architecture for the Internet Protocol|url=https://tools.ietf.org/html/rfc4301|website=IETF.org|year=2005 |publisher=Internet Engineering Task Force|doi=10.17487/RFC4301 | accessdate=20 July 2016}}</ref><ref name="Rolim1999">{{cite book|author=Jose Rolim|title=Parallel and Distributed Processing: 11th &#91;i.e. 11&#93; IPPS/SPDP'99 Workshops Held in Conjunction with the 13th International Parallel Processing Symposium and 10th Symposium on Parallel and Distributed Processing, San Juan, Puerto Rico, USA, April 12-16, 1999 : Proceedings|url=https://books.google.com/books?id=G_gU40HfwrQC&pg=PA391|date=30 March 1999|publisher=Springer Science & Business Media|isbn=978-3-540-65831-3|page=391}}</ref> The term was originally used to indicate that the device should introduce only a relatively small increased latency in communications compared to the original, unsecured, approach.

An example of such a device might be a [[security appliance]] which applies [[IPsec]] protection to communications between existing devices which themselves lack IPsec implementation protocol stack.{{Ref RFC|4949|notes=no|rp=43}} Such a device might also be called a security gateway or  could be implemented as part of a network firewall to implement a [[tunneling protocol]].

==References==
{{Reflist}}

[[Category:Computer-mediated communication]]


{{internet-stub}}

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