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Code Kept Secret for Years Reveals Its Flaw–A Backdoor

• archo 3y ago
  Terrestrial Trunked Radio (TETRA) – (Trans-European Trunked Radio) : https://en.wikipedia.org/wiki/Terrestrial_Trunked_Radio https://en.wikipedia.org/wiki/Terrestrial_Trunked_Radio
• rasz 3y ago
  >TETRA encryption algorithms use 80-bit keys ... but TEA1 has a feature that reduces its key to just 32 bits https://en.wikipedia.org/wiki/Export_of_cryptography_from_the_United_States https://en.wikipedia.org/wiki/Export_of_cryptography_from_th... >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. First SSL crippled to 40-bit RC2/RC4 First 802.11 wireless protocol WEP "64" key length shortened to 40 bits https://en.wikipedia.org/wiki/A5/1 https://en.wikipedia.org/wiki/A5/1 vs https://en.wikipedia.org/wiki/A5/2 https://en.wikipedia.org/wiki/A5/2 >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 >Documents leaked by Edward Snowden in 2013 state that the NSA "can process encrypted A5/1" Guess we can add Tetra to the list.