Encryption and Decryption

What is the purpose of encryption in data protection?

• To increase data size

• To make data public

• To protect data by converting it into a secure format

• To permanently delete data

What is required to decrypt the data that has been encrypted?

• Public key

• Antivirus software

• Private key

• User password

What is plaintext in the context of encryption?

• A series of randomized letters and numbers

• The original message before encryption

• The encrypted message that is unreadable

• A type of encryption algorithm

What does ciphertext represent in encryption?

• The decrypted message

• The original unencrypted message

• The encrypted message that is unreadable

• The key used for encryption

How many letters does the encryption key move in the provided example?

• 22 letters

• 4 letters

• 26 letters

• 10 letters

What is the decryption key in the example provided?

• 4

• 22

• 26

• 10

What is the plaintext message for the ciphertext "KHOOR ZRUOG" if a simple Caesar cipher was used for encryption?

• HELLO WORLD

• WELCOME HOME

• GOOD MORNING

• QUICK BROWN

What type of key is typically required to decrypt a message that has been encrypted using a private key?

• Public key

• Symmetric key

• Asymmetric key

• No key is required

What is the process called where a readable message is converted into an unreadable form to prevent unauthorized access?

• Decryption

• Compression

• Encryption

• Encoding

What is the original message called before it undergoes encryption?

• Ciphertext

• Code

• Plaintext

• Encoded text