Can you crack GCHQ's code-breaker challenge?

[Jonathan Scott]

Nice little puzzle:
http://www.bbc.co.uk/programmes/art...9J/can-you-crack-gchqs-code-breaker-challenge
I didn't find it particularly difficult (less than a minute to spot how to do it, and a few minutes to actually work through it), although Google translate thinks the second last word is spelt incorrectly.

 

[Greg Bernhardt]

Put the solution in a spoiler tag here :)

 

[Jonathan Scott]

It says on the puzzle page that the answer will be revealed today, but here's a clue.

Spoiler

Samuel Morse, Louis Braille, Ludwik Zamenhof, Tim Berners-Lee.

 

[Larry Gopnik]

Have you seen that they have just brought out a book of GCHQ puzzles?

https://www.amazon.com/dp/0718185544/?tag=pfamazon01-20

I got interested in their puzzles after their Xmas nonogram last year and bought this book the other day.

 

[Jonathan Scott]

The solution has been posted by the BBC, via a link on the original puzzle page or directly here:
http://www.bbc.co.uk/programmes/art...7HKs/gchq-code-breaker-challenge-the-solution
They have also confirmed the error in the second last word of their translation.