Symmetrical Encryption

For symmetrical encryption, the data is encrypted and decrypted by using the same key.

Symmetrical encryption algorithms include DES, Triple DES (also known as 3DES), Blowfish, and AES. For more information, see Data Encryption Algorithms.

In most cases, symmetrical encryption are more efficient than asymmetrical encryption. But using symmetrical encryption to send an encryption key over the internet might cause security problems, because the receiver must use the same key as the sender to decrypt the data.