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31.

The Turing Challenge – GCHQ puzzles released for the Turing banknote

5 years ago

2 points

32.

The Turing Challenge

5 years ago

2 points

33.

GCHQ – Stay at Home Brainteasers

6 years ago

2 points

34.

The Vulnerabilities Equities Process

8 years ago

2 points

35.

The Equities Process

8 years ago

2 points

36.

Director Robert Hannigan dispels some myths about encryption in MIT speech

10 years ago

2 points

37.

GCHQ: A Christmas card with a cryptographic twist for charity

11 years ago

1 points

38.

Our rainbow celebration to mark IDAHOT day

11 years ago

1 points

39.

A short history of Sigint in Scarborough

3 years ago

1 points

40.

GCHQ challenges you to crack codes for charity with its first ever puzzle book

9 years ago

1 points

41.

CyberChef by GCHQ

10 years ago

1 points

42.

The possibility of secure non-secret digital encryption (1970) [pdf]

10 years ago

1 points

43.

GCHQ's Christmas card puzzle: 600K entries, no winners

10 years ago

1 points

44.

Director GCHQ's Christmas Puzzle – Part 2

10 years ago

1 points