public key cryptography
 

What is public key cryptography and symmetric encryption?


cryptography and network security

Public-key cryptography refers to a method of encryption (i.e. garbling a message so that unintended people cannot read it) in which for each person a pair of keys (digital codes) are involved, one called the public key cryptography.

Symmetric encryption is the oldest and best-known technique. A secret key, which can be a number, a word, or just a string of random letters, is applied to the text of a message to change the content in a particular way.