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Reference.org
ARPANET encryption devices
open-in-new
<p>The <a href="/facts/ARPANET/LyMGWurJ">ARPANET</a> pioneered the creation of novel <a href="/facts/Encryption/16q29Fdv">encryption</a> devices for packet networks in the 1970s and 1980s, and as such were ancestors to today's <a href="/facts/IPsec/01MwcET1">IPsec</a> architecture, and <a href="/facts/High_Assurance_Internet_Protocol_Encryptor/PTQPnpEm">High Assurance Internet Protocol Encryptor</a> (HAIPE) devices more specifically. </p><p>The first such device for the ARPANET was the private line Interface (PLI), and a series of additional devices was created during the 1970s and 1980s in ARPANET-related research and development, such as: </p> <ul><li>Private line interface (PLI)</li> <li>Black-crypto-red (BCR)</li> <li>Blacker</li> <li>Internet private line interface (IPLI)</li></ul>