“Encryption works best if it is ubiquitous and automatic. It should be enabled for everything by default, not a feature you only turn on when you’re doing something you consider worth protecting.”
-Bruce Schneier, Cryptographer, Privacy and Security Specialist
There are two methods of encryption: symmetric and asymmetric encryption. Symmetric encryption, also known as secret key encryption, pertains to the sender and the recipient holding the same keys to encrypt and decrypt a message. Asymmetric encryption, or public key encryption uses what is called a key pair—a public key for encrypting a message, and a private key to decrypt it.