Encryption and Public Keys

What is the main topic of the video?

• Cybersecurity

• Internet connections

• Computer programming

• Data encryption

According to the video, why is it important to keep data confidential on the internet?

• To protect personal information

• To prevent hacking attempts

• To ensure secure communication

• All of the above

What is encryption?

• A process that hides the original text

• A method to decode messages

• A way to protect computer data

• None of the above

What is the Caesar cipher?

• An encryption algorithm used by Jules Caesar

• A method to protect military orders

• A way to replace each letter in a message

• All of the above

Why is the Caesar cipher not secure?

• It can be easily cracked by trying all possible keys

• It is based on a known algorithm

• It requires only 26 keys to try

• All of the above

How many possible keys are there in a 10-digit encryption?

• 10
  

• 26

• 1,000

• 10 billion

What is the purpose of using a longer key in encryption?

• To make the message more complicated

• To increase the security level

• To reduce the chances of cracking the algorithm

• All of the above

What is the difference between symmetric and asymmetric encryption?

• Symmetric encryption uses the same key for encryption and decryption, while asymmetric encryption uses different keys.

• Symmetric encryption is more secure than asymmetric encryption.

• Symmetric encryption is used for private communication, while asymmetric encryption is used for public communication.

• Symmetric encryption requires two people to meet privately to decide on a secret key.

How does asymmetric encryption work?

• It uses a public key to encrypt data and a private key to decrypt it.

• It requires two people to share the same private key.

• It is based on complex mathematical formulas.

• All of the above

What is the role of public key encryption in secure messaging on the internet?

• It allows anyone to encrypt data using a public key.

• It ensures that only the intended recipient can decrypt the message.

• It provides protection when surfing the web.

• All of the above