>TETRA encryption algorithms use 80-bit keys ... but TEA1 has a feature that reduces its key to just 32 bits<p><a href="https://en.wikipedia.org/wiki/Export_of_cryptography_from_the_United_States" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/Export_of_cryptography_from_th...</a><p>>Later provision was added to allow export of 56-bit encryption if the exporter promised to add "key recovery" backdoors by the end of 1998.<p>First SSL crippled to 40-bit RC2/RC4<p>First 802.11 wireless protocol WEP "64" key length shortened to 40 bits<p><a href="https://en.wikipedia.org/wiki/A5/1" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/A5/1</a> vs <a href="https://en.wikipedia.org/wiki/A5/2" rel="nofollow noreferrer">https://en.wikipedia.org/wiki/A5/2</a><p>>to allow the British secret service to eavesdrop more easily. The British proposed a key length of 48 bits, while the West Germans wanted stronger encryption to protect against East German spying, so the compromise became a key length of 54 bits<p>>Documents leaked by Edward Snowden in 2013 state that the NSA "can process encrypted A5/1"<p>Guess we can add Tetra to the list.