• NSA CryptoChallenge 1
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NSA CryptoChallenge

Find a pattern and crack the code. The National Security Agency’s NSA CryptoChallenge is all fun and games, but NSA’s mission is serious and vital to the nation’s safety.
NSA needs the best and brightest problem solvers to protect U.S. information systems and produce foreign intelligence.

Visit NSA.gov/Careers to learn more about NSA and how you can contribute to this important work.

© 2014 National Security Agency

Category : Puzzle

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Reviews (30)

Mar. K. May 8, 2020     

Best app ever, but they - neighbors - hacked it - it doesn't open anymore. All not ordinary stuff gets hacked here - because German hypocratical "Angst" is always more important than every constitutional right of not Germans. At the end the potential butter bread they are waiting for could be stolen by immigrants before Germans are able to bake it and to have money for the butter, so they prefer to damage the immigrant able to bake and with enough money to buy. Unfair advanteges!

Ste. C. Jul 7, 2017     

I've only rated it 3 stars because it's not formatted for the S8, viz, the screen formatting is too wonky to play. That being said, I played on my earlier device, the S6, and it was fun and challenging. Definitely worth DLing if you're a crypto dork (like me). Devs, fix the format issue and I'll happily change my rating to 5 stars.

Amy. H. Mar 7, 2017     

I really enjoyed this game, right up until I ran out of advanced puzzles. Now I can't even start an advanced game. It would be great if more complicated types of ciphers were added!

Yol. C. Dec 10, 2017     

Having the option buttons right undearneath the keyboard made it hard to play without making a mistake by accidentally clicking on them. Guessing names for this is hard even for beginner. Most people try and decode words not names in most cases. Other than that it is fun to play.

001. Apr 7, 2017     

Two letters were missing on keyboard P and L. If you are going to leave out letters L isn't the best choice

Cae. R. Jan 6, 2017     

You should change it to use the phone's default keyboard, the in app one is cut off, there are no P or L keys.

Jon. S. Feb 15, 2017     

I like this game great puzzle, but the keyboard doesn't have P or L making some of the puzzles unsolvable.

Don. V. Feb 22, 2018     

It started off as an awesome game... Should've read more of the reviews, but seriously ? Come on, guys ! The game has had the same glitch for at least 3 years, and in that time, ya'll have updated it at least once... Why is there still a glitch ?!? Did you guys just give up on it

A. G. u. Jan 18, 2017     

I wish there was a more challenging difficulty level though.

Jef. G. Aug 2, 2017     

Great game. More puzzles would be nice. One puzzle is incorrect, though. The author of "The Cuckoo's Egg" is Clifford Stoll, not Stall.

Arm. B. Dec 11, 2016     

If NSA created this app, I'd say you guys are awesome! The puzzles are really hard to decode! How can you possibly decode this when certain letters from keyboard are missing! Nice job! GREATEST app of all time!

Gri. R. Apr 10, 2016     

Doesn't have the letters P or L on keyboard. Boring.

Sad. A. Z. Dec 16, 2016     

Great app with the most horrible bug!

Ama. G. Jan 26, 2017     

The game is challenging. Perhaps you could use foreign languages to decrypt to make it harder.

Han. C. Dec 3, 2016     

Fix the keyboard and this will be fun.

Mik. B. Nov 30, 2016     

No P or L on keyboard! Can't use default keyboard, makes the game useless !!!

Bla. M. Feb 12, 2017     

Good game but letters p and l are missing from keyboard

A. G. u. May 3, 2016     

This app doesn't respond at all.

Pol. C. Jan 11, 2017     

No p or L. Can't solve without ALL the letters!

Cat. F. Mar 15, 2017     

P, L and CLEAR missing on the keyboard. Can't complete the game. Can you pls fix this

Vik. S. May 12, 2016     

Renders the app useless

And. D. Apr 6, 2016     

Missing "p" key. Why can't you use the default keyboard???

Ste. H. Apr 22, 2017     

The keys p and L are missing. In your keyboard

A. G. u. Sep 11, 2017     

Funny Challenging

Ben. O. Jun 17, 2016     

No P&L on the keyboard... What the heck??? FIX IT!!!

Flo. P. Apr 9, 2016     

Love it

A. G. u. Dec 18, 2016     

Interesting

Dev. W. Dec 16, 2014     

I love puzzle and code games. This one was fun to play and I enjoyed the historical bits and quotes. This app fell short however when I couldn't complete the puzzles due to the keyboard being cut short. I tried rotating my Samsung galaxy to see if that gave me the full keyboard and it didn't. I tried pinching, dragging, minimizing. Sadly nothing worked. If I don't have all the letters I can't solve the puzzle. Get this bug fixed and I will reinstall and give it five stars.

Ric. T. Jun 25, 2015     

No P or L keys. I assume there's some sort of clever NSA crypto reason for this because otherwise it's just unthinkable incompetence, but all I wanted was a few puzzles. I'll try elsewhere. Uninstalling.

Jac. G. Feb 19, 2015     

I like this game but my game keyboard is missing a 'p' and there's no clear option. Its not my keyboard as i have those things, and it looks like I'm not alone.Fix this and then ill give it the other star. Also it'd be nice if you explained the difference between the levels. I was done with a whole puzzle in intermediate before i realized why it was harder than beginner