What is the difference between symmetric and asymmetric encryption, and when would you use each in a security context?

Symmetric encryption uses a single key to both encrypt and decrypt data, whereas asymmetric encryption uses a pair of keys - a public key for encryption and a private key for decryption.

In terms of security context, symmetric encryption is typically faster and more efficient for encrypting large amounts of data, making it ideal for securing data in transit or storing data securely. However, the challenge with symmetric encryption lies in securely sharing the key with the intended recipient without the risk of interception.

On the other hand, asymmetric encryption provides a more secure way for key exchange as the public key can be shared openly while the private key remains confidential. This makes asymmetric encryption more suitable for tasks like secure communication, digital signatures, and establishing secure connections.

In summary, symmetric encryption is preferable for bulk encryption needs where speed and efficiency are crucial, while asymmetric encryption is recommended for secure key exchange and communication in a security context.