Encryption means to scramble a message in such a way that only the people who are meant to read it can do so.

A message sent 'in the clear' looks like:

"This is a message anyone can read"

and the encrypted message looks like gibberish:


Encryption works by both people making use of a secret 'key' that only they know (or at least their computers know). The original message is mixed in with the key to create a secret message. This is done by some very crafty mathematics so that it is very very hard for someone to crack the code - very powerful computers working for a long time would be needed to crack a good code.

Challenge see if you can find out one extra fact on this topic that we haven't already told you

Click on this link: Encryption


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