Editing NSA encryption systems (section)

=== Public systems ===

NSA has participated in the development of several cipher devices for public use. These include:
* [[NSA Suite B Cryptography|Suite B]]: a set of [[public key cryptography|public key]] algorithm standards based on [[elliptic curve cryptography]].
* [[Advanced Encryption Standard]] (AES): an encryption algorithm, selected by [[NIST]] after a public competition. In 2003, NSA certified AES for [[Type 1 encryption|Type 1]] use in some NSA-approved systems.
* [[Secure Hash Algorithm]]: a widely used family of [[Cryptographic hash function|hash algorithm]]s developed by NSA based on earlier designs by [[Ron Rivest]].
* [[Digital Signature Algorithm]]
* [[Data Encryption Standard]] (DES)<ref>{{cite web|url = https://www.nsa.gov/public_info/_files/cryptologic_histories/cold_war_iii.pdf|title = American Cryptology during the Cold War, 1945-1989.Book III: Retrenchment and Reform, 1972-1980, page 232|author = Thomas R. Johnson|accessdate = 2010-01-03|publisher = [[NSA]], DOCID 3417193|date = 2009-12-18|url-status = dead|archiveurl = https://web.archive.org/web/20100527214909/http://www.nsa.gov/public_info/_files/cryptologic_histories/cold_war_iii.pdf|archivedate = 2010-05-27}}</ref>
* [[Skipjack (cipher)|Skipjack]]: the cipher developed for Clipper and finally published in 1998.
* [[Clipper chip]]: a controversial failure that convinced NSA that it was advisable to stay out of the public arena.
* [[Security-Enhanced Linux]]: not strictly a cipher device, but a recognition that in the 21st century, [[operating system]] improvements are more vital to information security than better [[cipher]]s.
* The [[Speck (cipher)|Speck]] and [[Simon (cipher)|Simon]] light-weight [[Block cipher]]s, published in 2013.