Encryption

The Caesar cipher is one of the oldest encryption methods, shifting each letter in a message by a fixed number of positions in the alphabet.

Encryption transforms readable data into an unreadable form so that only authorised parties can access it. It is the foundation of secure communication on the internet.

HTTPS uses encryption to protect data travelling between your browser and a website, keeping your passwords and personal information safe.

Symmetric encryption uses the same key to both encrypt and decrypt data, making it fast but requiring the key to be shared securely.