What is the Rivest-Shamir-Adleman (RSA) system used for?

The Rivest-Shamir-Adleman (RSA) system is primarily used for internet encryption and authentication because it is a widely adopted public-key cryptography method. RSA enables secure data transmission over networks by allowing users to encrypt messages using a public key that can be freely shared, while only the intended recipient can decrypt the message using their private key. This mechanism not only ensures confidentiality but also provides a way to authenticate the identity of the sender, confirming that the message hasn’t been altered in transit.

The RSA algorithm's ability to facilitate secure key exchanges and digital signatures further solidifies its role in internet security protocols like SSL/TLS, which are essential for safe web communications. By enabling encryption and verification, RSA plays a crucial role in establishing trust and protecting sensitive information shared online.