crypto

The One-Time-Pad generalized to groups

We recap the usual OTP with encryption in $\\{0, 1\\}^n$ being $m \oplus K$ and note how its slogan "every ciphertext can come from any plaintext" justifying its security is just a consequence of the group structure in $\\{0, 1\\}^n$. We then formulate the more general OTP over groups.