one-time pad encryption 2

https://securemessagingservicespark.alderbrief.com/posts/what-to-look-for-in-a-secure-messaging-service

One-time pad encryption is a theoretically unbreakable method where a secret key, as long as the message itself, is used only once. Each character of the plaintext is combined with a random key character, often using modular addition, producing ciphertext that reveals no information about the original. The key must be truly random, kept completely secret, and never reused. Its main drawback is the practical challenge of securely generating and distributing such long keys, making it more suited…