Which encryption method is known for requiring two different keys for encryption and decryption?

The method that requires two different keys for encryption and decryption is Asymmetric Encryption. This type of encryption involves the use of a public key and a private key. The public key can be freely shared and is used for the encryption of data, while the private key is kept secret and used for decryption. This key pair approach allows secure communication between parties who have not previously met or exchanged keys.

In contrast, Symmetric Encryption uses the same key for both encryption and decryption, meaning the same key must be kept secret and shared between the communicating parties. Block Ciphering and Stream Ciphering are techniques that can be employed within symmetric encryption schemes, focusing on how data is processed rather than the key management approach used in asymmetric encryption. As a result, these methods do not utilize two distinct keys, which distinguishes Asymmetric Encryption as the correct answer.