Encryption：練習題

Which of the following describes the relationship between the keys used in symmetric encryption?

What is a significant disadvantage of using symmetric encryption compared to asymmetric encryption when communicating over the internet?

Why is asymmetric encryption considered more suitable for communication between thousands of strangers on the internet than symmetric encryption?

In symmetric encryption, if the sender uses a specific key to encrypt a file, which key must the receiver use to decrypt it?

Which statement correctly describes a core feature of asymmetric encryption?

State the main security risk associated with the key distribution process in symmetric encryption compared to asymmetric encryption.

In asymmetric encryption, explain how the relationship between a public key and a private key ensures that only the intended recipient can read a transmitted message.

Briefly describe how symmetric encryption works, focusing on the use of keys.

a) Define the term encryption.

b) Explain the primary purpose of encryption when transmitting sensitive data over a network.

A small office network uses various hardware devices to facilitate communication and connect to the internet.

a) Describe the primary function of a network switch within a Local Area Network (LAN) and how it differs from a router.

b) Explain the purpose of a router in connecting the office LAN to the internet, specifically mentioning its use of IP addresses.

c) When sensitive data is sent from a computer in the office to a server on the internet, asymmetric encryption is often used to establish a secure connection. Describe the process of how two entities (e.g., the office computer and the server) would use public and private keys with asymmetric encryption to securely exchange a symmetric key for further communication.