[Trae Johnson]

The main difference between symmetric and asymmetric cryptography lies in how they make use of keys for encrypting and decrypting information. Symmetric cryptography makes use of one secret key shared among the users in encrypting and decrypting data. This therefore makes it very fast and efficient for encrypting large amounts of information, such as files or messages. Its weakness, however, is that it requires key distribution: beforehand, both parties must exchange the key safely, and if the key is intercepted, all data encrypted under that key will be compromised.

Asymmetric cryptography involves a pair of keys for each user: a public key that can be shared openly and a private key that remains secret. This solves the key distribution problem and also allows the use of digital signatures, which provide verification of the identity and integrity of data. The principal disadvantage is that the algorithms are more complex, therefore slower and requiring more processing power. In practice, hybrid approaches often combine symmetric encryption for speed and asymmetric encryption for secure key exchange, leveraging the strengths of both.