Layer Your Codes For Double Security

You built a clever keyword cipher, but there is a catch. A determined snooper with enough time can still crack a basic code just by hunting for common letters. To truly protect your secrets and buy yourself time, you need to level up.

Enter superencipherment, a very long word for a very smart trick: layering your codes. Instead of encrypting your secret note just once, you scramble it, and then you scramble that new message a second time.

First, run your plaintext through your keyword alphabet. Then, take that gibberish and run it through a shift cipher, sliding every letter down three spaces. The letter "E" might turn into "J", and then morph into "M".

A snooper now has to beat two puzzles at once! Just remember to use completely different rules for each layer. If you encrypt a note twice with the exact same method, mathematically, you might even accidentally decrypt it!