I came up with a neat little cipher that I'm calling the dual key cipher. The basic premise is that there are two cipher keys that, when used together can decode the cipher text against a given alphabet. Here is a basic example.
Key 1: CAT Key 2: DOG Alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ Cipher Text: ISA
The result would be:
Can you solve for this one? Bonus points for showing your work.
Puzzle 1 Key 1: FISH Key 2: DUCK Alphabet: ABCDEFGHIJKLMNOPQRSTUVWXYZ Cipher Text: ZUBG
Additional (off-topic) questions: Does anyone know if this type of cipher exists and if it has an official name? I've developed an algorithm that does this at a massive scale and wanted to know if anyone finds it interesting. Here is a somewhat more difficult version using my algorithm.
Puzzle 2 Key 1: Chocolate Key 2: Strawberry Alphabet: abcdefghijklmnopqrstuvwxyz ABCDEFGHIJKLMNOPQRSTUVWXYZ Cipher Text: lmqgtbeyVXPERdpbX
Hint: The space between "z A" is part of this "alphabet".