NSA CryptoChallenge

from CACI-CMS Information Systems, Inc., originally released 26th August, 2011

Developed by the National Security Agency, NSA CryptoChallenge is a game that tests your pattern recognition skills through a series of cryptographs. Your mission is to decipher encrypted quotes, factoids, historical events and more. It’s you against the clock to see how fast you can crack the cod...

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