[HN Gopher] Code Kept Secret for Years Reveals Its Flaw-A Backdoor
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       Code Kept Secret for Years Reveals Its Flaw-A Backdoor
        
       Author : simon_acca
       Score  : 12 points
       Date   : 2023-07-24 20:43 UTC (2 hours ago)
        
 (HTM) web link (www.wired.com)
 (TXT) w3m dump (www.wired.com)
        
       | archo wrote:
       | Terrestrial Trunked Radio (TETRA) - (Trans-European Trunked
       | Radio) : https://en.wikipedia.org/wiki/Terrestrial_Trunked_Radio
        
       | rasz wrote:
       | >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_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 vs
       | 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.
        
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       (page generated 2023-07-24 23:03 UTC)