The alphabet was 26. That wasn't enough.
So they took it again — lowercase this time — then counted to ten, and borrowed two more.
The tail end always gives it away.
Caesar never finished the alphabet.
Halfway through, he stopped — and found that halfway back was the same door.
Apply the same shift twice and you're back where you started.
This one was made, not borrowed.
Each character carries its position like a weight. The key multiplies that weight.
Then it crosses itself — the key, shifted by where it stands.
The key is a number. Find it first.
Each pair of hex digits is one byte, at position i (starting from zero).
It was encoded as: ( ascii + i × key ) mod 256, then XOR'd with ( i + key ).
Reverse both operations. In the right order.