# Resources tagged with: Codes and cryptography

### There are 18 results

Broad Topics >

Applications > Codes and cryptography

##### Age 11 to 16 Challenge Level:

Time for a little mathemagic! Choose any five cards from a pack and show four of them to your partner. How can they work out the fifth?

##### Age 16 to 18 Challenge Level:

Third challenge cipher

##### Age 11 to 16 Challenge Level:

Can you work out what size grid you need to read our secret message?

##### Age 16 to 18 Challenge Level:

Seventh challenge cipher

##### Age 16 to 18 Challenge Level:

Sixth challenge cipher

##### Age 16 to 18 Challenge Level:

Fourth challenge cipher

##### Age 16 to 18 Challenge Level:

Fifth challenge cipher

##### Age 16 to 18 Challenge Level:

Second challenge cipher

##### Age 16 to 18 Challenge Level:

Is the regularity shown in this encoded message noise or structure?

##### Age 16 to 18 Challenge Level:

Can you crack these very difficult challenge ciphers? How might you systematise the cracking of unknown ciphers?

##### Age 14 to 18

Simon Singh describes PKC, its origins, and why the science of code making and breaking is such a secret occupation.

##### Age 7 to 18 Challenge Level:

The Enigma Project's James Grime has created a video code challenge. Watch it here!

##### Age 14 to 16 Challenge Level:

How can Agent X transmit data on a faulty line and be sure that her message will get through?

##### Age 16 to 18 Challenge Level:

First cipher

##### Age 16 to 18 Challenge Level:

In 'Secret Transmissions', Agent X could send four-digit codes error free. Can you devise an error-correcting system for codes with more than four digits?

##### Age 11 to 16 Challenge Level:

Substitution and Transposition all in one! How fiendish can these codes get?

##### Age 11 to 16 Challenge Level:

Here is the start of a six-part challenge. Can you get to the end and crack the final message?

##### Age 11 to 18 Challenge Level:

Our toolkit removes the drudgery of codebreaking while leaving you to do the hard thinking!