Encodings

An encoding is a way to write the same data in another form. It hides nothing: anyone can reverse it.

Spot them

• Hex uses 0-9 and a-f: 48656c6c6f
• Base64 uses letters, digits, + and /, often ends with =: SGVsbG8=
• URL encoding uses % and two hex digits: Hello%20World

$ echo SGVsbG8= | base64 -d
Hello

Try it

Encode your name in Base64, then decode it again. Then decode 43544620697320666f756e from hex.