Asymmetric encryption is a method of securing data using two different keys: a public key and a private key. The public key can be shared with anyone, allowing them to encrypt messages intended for the key's owner. Only the owner, who possesses the corresponding private key, can decrypt these messages, ensuring confidentiality. This technique is widely used in various applications, including secure online communications and digital signatures. By using asymmetric encryption, users can verify the authenticity of a message and ensure that it has not been tampered with, enhancing overall security in digital transactions.