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Cryptographic Algorithms
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This page will be used as a hub to the various cryptographic algorithms used in the equipment described on this website.

Public algorithms
Secret NSA algorithms
Below is a non-exhaustive overview of (secret) encryption algorithms that have been developed by or for the US National Security Agency (NSA) and that are further described on this website. These algorithms are generally classed as an NSA Type 1 or Type 2 algorithm and are intended for governmental and military use. For a more complete overview, check out this page.

Backdoored NSA algorithms
  • PX-1000Cr
    In 1983, the NSA persuaded Dutch electronics giant Philips to replace the DES algorithm of the PX-1000 pocket telex, by an alternative NSA-developed algorithm that appeared stronger, but could in reality be broken with relative ease by the NSA.

  • SBT Algorithm
    In 1984, the NSA persuaded Dutch electronics giant Philips to replace the DES algorithm of the Nokia SANLA, also known as the Short Burst Terminal (SBT), by an NSA-supplied alternative that appeared stronger but was in fact breakable. The product was released as the Philips UA-8295. The weakened cipher was internally known as the SBT algorithm.
Proprietary algorithms
Further information
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Crypto Museum. Created: Friday 20 May 2016. Last changed: Tuesday, 06 June 2023 - 16:37 CET.
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