what is symmetric encryption
Definition of Symmetric Encryption. Symmetric Encryption is an Encryption algorithm where the same key is used for both Encryption and Decryption. The key must be kept secret, and is shared by the message sender and recipient.efinition of Symmetric Encryption. Symmetric Encryption is an Encryption algorithm where the same key is used for both Encryption and Decryption. The key must be kept secret, and is shared by the message sender and recipient.