ULTRA is also ww2 encryption/decryption technology, as opposed to the german ENIGMA.
Ultra details
Ultra - Wikipedia, the free encyclopedia
The germans had a lot of faith in their analogue, mechanical cylinder based
ENIGMAs.
Pity the Brits had their first electronic calculators (eight Colossuses) ready at hand to decypher german secret messages.
The italian navy had become suspicious and had expressed the german command its doubts about their system, receiving an haughty answer ...
Every once in a while an italian government body does something good and see what did happen.