Secret Key Cryptography, or symmetric cryptography, uses a single key to encrypt data. Both encryption and decryption in symmetric cryptography use the same key, making this the easiest form of cryptography.
The cryptographic algorithm utilizes the key in a cipher to encrypt the data, and when the data must be accessed again, a person entrusted with the secret key can decrypt the data.
Secret Key Cryptography can be used on both in-transit and at-rest data but is commonly only used on at-rest data, as sending the secret to the recipient of the message can lead to compromise.
