reading-notes

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cryptography has been around since the romans when Ceasar used a “ceasar cipher” to shift letters around so only he knew what it said
cryptography is essentially making text gibberish unless you have a cipher to read it.
to create such a thing is to encrpyt
to undo it is to decrypt
The germnan enigma was a multi-layered substitution cipher
Frequency analysis is seeing how often some things are used. So for example in the english language we use the letter E a lot!
brute forcing is a way to get through light encryption but impossible for modern well desgined encryption.