Asymmetric Key Cryptography

• Aka Public key cryptography

• A pair of related keys are used:

• Public and Private keys
• Private key can’t be calculated from Public key

• Data encrypted with one can only be decrypted with the other

• Usually, a user publishes his public key widely

• Others use it to encrypt data intended for the user
• User decrypts using the private key (known only to him)

• Examples: RSA