Cryptography, Encryption, Public Key Cryptography, Asymmetric Encryption, Non Technical.
It could have been something like 9–4–2 or even a longer sequence like 7–4–5–2–8. We are coming up with a secret “key” or password to allow someone else to decipher our messages. Hebrew scholars used this way of ciphering a message using substitutions around 500 BC. They would agree on a short