Asymmetric encryption, also known as public key cryptography, uses two different keys for

encryption and decryption: a public key and a private key. The public key can be shared with anyone,

while the private key must be kept secret. Data encrypted with the public key can only be decrypted

with the private key, and vice versa. This ensures that only the intended recipient can access the

encrypted data, and that the sender can prove their identity with a digital signature. Asymmetric

encryption is widely used for securing Internet communications, such as TLS/SSL, which enables

HTTPS. Some examples of asymmetric encryption algorithms are RSA, Diffie-Hellman, and Elliptic

Curve Cryptography. The other options are not correct because they do not use a public key and

private key. Symmetric encryption uses the same key for encryption and decryption, and is faster and

more efficient than asymmetric encryption. However, symmetric encryption requires a secure way to

exchange the key between the sender and the receiver, which can be facilitated by asymmetric

encryption. Linear and nonlinear encryption are not types of encryption, but rather properties of

encryption algorithms. A linear encryption algorithm is one that can be expressed as a linear

function, such as XOR. A nonlinear encryption algorithm is one that involves more complex

mathematical operations, such as modular arithmetic or S-boxes. Nonlinear encryption algorithms

are generally more secure and resistant to cryptanalysis than linear encryption

algorithms. Reference :=

Public-key cryptography - Wikipedia

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