Asymmetric cryptography, also known as public key cryptography, is a type of cryptography that uses two different keys to encrypt and decrypt data. One key is used to encrypt the data, while the other is used to decrypt it. Asymmetric cryptography is used to secure data transmissions over the internet and is an important part of modern security protocols. It is also used to verify the identity of users and to ensure that data is not tampered with during transmission.