I mean, not just the UK - it eventually changed in the US, but anything deemed too strong to crack was classified as a munition for a while in the 90s and 00s,

I mean, not just the UK - it eventually changed in the US, but anything deemed too strong to crack was classified as a munition for a while in the 90s and 00s, and some things are still banned from being shipped to some places - https://en.wikipedia.org/wiki/Export_of_cryptography_from_the_United_States https://en.wikipedia.org/wiki/Export_of_cryptography_from_th... "It's just math, you can't ban it" has never been true.