The RSA

RSA is a method for securing digital communication by using a pair of keys: a public key to encrypt messages and a private key to decrypt them. It’s based on mathematically linking two large prime numbers; it's easy to multiply them but hard to factor their product back into the original primes. When someone wants to send a secure message, they encrypt it with the recipient’s public key. Only the recipient, with their private key, can decrypt and read the message. This ensures privacy and authentication in online communications.