Public Key Cryptography

Symmetric cryptography was well suited for organizations such as governments military and big financial corporations were involved in the classified communication.
Public key cryptography. A message sender uses a recipient s public key to encrypt a message. Unlike symmetric key cryptography we do not find historical use of public key cryptography. Public key cryptography or asymmetric ptography is a cryptographic system that uses pairs of keys. The other key is known as the private key.
It is a relatively new concept. Pgp is an example of a protocol that uses both symmetric cryptography and public key cryptography asymmetric. Public keys which may be disseminated widely and private keys which are known only to the owner the generation of such keys depends on cryptographic algorithms based on mathematical problems to produce one way functions effective security only requires keeping the private key private. Public key cryptography pkc is an encryption technique that uses a paired public and private key or asymmetric key algorithm for secure data communication.
Public key encryption actually just encrypts a symmetric key which is then used to decrypt the actual message. Public key encryption or public key cryptography is a method of encrypting data with two different keys and making one of the keys the public key available for anyone to use.