In cryptography, encryption is the process of encoding information. This process converts the original representation of the information, known as plaintext, into an alternative form known as ciphertext. Ideally, only authorized parties can decipher a ciphertext back to plaintext and access the original information.
Yes old encryption methods worked in a similar way, for example ROT13. The security of these methods ultimately relies on keeping the encryption process a secret, i.e. security through obscurity. These days we know that's not good.
Modern encryption methods are publicly known and thus do not have that vulnerability. The security of modern encryption algorithms rely on keeping some sort of key a secret instead of the actual encryption process.
Ahh cool thanks for the info!
That would be a transposition cipher on the level of bits instead of characters, so it should have the same properties https://en.wikipedia.org/wiki/Transposition_cipher?wprov=sfla1
transposition cipher
Ohh that's what it's called, thanks!