[mewse]

Well-known caveat for people who are familiar with encryption, but it's worth calling out explicitly here:

If you use the same one time pad to encode two or more different messages, then all the sorts of attack proposed here become plausible again.

The security provided by a one time pad relies entirely on the fact that it is only ever used once.

[sold]

I'd like to add this scenario actually happened during the Cold War. Soviets were reusing one time pads and the US army decrypted some of the messages, among other things this lead to discovery of Soviet spies targeting the US nuclear weapon program https://en.wikipedia.org/wiki/Venona_project

[pdkl95]

https://www.youtube.com/watch?v=yxx3Bkmv3ck

Computerphile recently showed how this was done.

[zrth]

Is it really still a "one time pad" if you used it multiple times?