Learn about data security, encryption, hashing and encoding in our knowledge base.

Symmetric encryption

Symmetric encryption (also known as secret key encryption) is a type of encryption that uses the same key for both encryption and decryption.

In symmetric encryption, a secret key is used to encrypt the data, and the same key is used to decrypt it. The key must be kept secret and is only known to the sender and the receiver of the encrypted data.

Symmetric encryption is generally faster and more efficient than asymmetric encryption, as it only requires a single key for both encryption and decryption. However, it has the drawback that the key must be exchanged securely between the sender and the receiver in order to enable encrypted communication.

Examples of popular symmetric encryption algorithms include AES, Blowfish, and Twofish. These algorithms are widely used in various applications, including secure communication over the Internet, file encryption, and database encryption.

Symmetric encryption is generally considered to be less secure than asymmetric encryption, as the key must be shared between the sender and the receiver. However, it can be used in conjunction with other security measures, such as key exchange protocols, to increase the overall security of the encrypted communication.