Yes very few Movies make encryption a real problem -

Of course in Dr Strangelove the inability to get the right code in the time allowed was a critical part of the story.

Then again in Enigma some of the difficulties were at least touched on.

__________________
Note 1. All requests for planetary demolition must now be submitted in quadruplicate on form UX-565/B4 and be counter-signed by the assistant administrative officer for interstellar traffic calming - department QG-7. Subject to approval by the chief planning officer and the infrastructure development coordination sub-committee.