The 12 best posters from the very odd NSA archive

Long before it was at the centre of a huge spying scandal, the US National Security Agency had the communist threat to deal with - and wanted to make sure its staff did not spill secrets.

A vast archive of posters, apparently for display at the spy agency's offices, has been posted online thanks to a freedom of information request from governmentattic.org.

The website asked for "a digital/electronic copy of the NSA old security posters from the 1950s and 1960s", although confusingly it also got one featuring John Travolta.

Here are some of our favourites.

1. The ominous one

Image source, NSA

2. The one with the art history

Image source, NSA

3. The one with the confusing metaphor

Image source, NSA

4. The one for sports fans

Image source, NSA

5. The festive one

Image source, NSA

6. The one with the tight trousers

Image source, NSA

7. The one with someone who doesn't even know what security is

Image source, NSA

8. The one with the more obvious metaphor

Image source, NSA

9. The one with the bad trip

Image source, NSA

10. The psychedelic one

Image source, NSA

11. The one that brings you down to earth

Image source, NSA

12. The one with the eager ear

Image source, NSA