Understanding Encryption and Secure Communication

What is the primary purpose of encryption?

• To reduce data redundancy

• To increase data size

• To make data transmission faster

• To hide the original message

What is a major flaw of Caesar's Cipher?

• It requires a computer to decrypt

• It is too complex for practical use

• It can be easily cracked by trying all possible keys

• It only works with numbers

How does modern encryption ensure security?

• By using only letters

• By reducing the number of possible keys

• By using 256-bit keys

• By using a single key for all messages

Why is it important to increase the key length in encryption?

• To keep up with increasing computer speeds

• To make encryption faster

• To make encryption easier

• To reduce the size of encrypted data

What is symmetric encryption?

• Encrypting data without a key

• Using the same key for both encryption and decryption

• Using a public key for encryption

• Using different keys for encryption and decryption

What is the main challenge with symmetric encryption on the internet?

• It cannot encrypt large files

• It requires a private meeting to share the key

• It is too slow for internet use

• It requires a public key

What is the main advantage of asymmetric encryption?

• It uses the same key for all users

• It allows secure communication without a shared private key

• It is faster than symmetric encryption

• It does not require any keys

What is the role of a public key in asymmetric encryption?

• To replace the private key

• To encrypt data that can be decrypted by the private key

• To decrypt messages

• To store encrypted messages

What does the presence of 'https' in a browser's address bar indicate?

• The website is using symmetric encryption

• The website is not secure

• The website is offline

• The website is using public key encryption

What is the foundation of secure messaging on the internet?

• Symmetric encryption

• Public key cryptography

• Caesar's Cipher

• 256-bit keys