WorksheetsAsymmetric and Symmetrical encryption
Total questions: 10
Worksheet time: 5mins
What is the main purpose of encryption?
To speed up message delivery
To compress the message
To encode a message so only the sender and intended recipient can read it
To turn a message into binary
What early encryption method replaces letters with others a fixed distance away?
Morse code
Caesar cipher
Vigenère cipher
Base64 encoding
In the Caesar cipher, what is the key?
The recipient’s email address
A random string of letters
The number of places the alphabet is shifted
The encryption software used
What is used in symmetric encryption?
Two different keys for each message
One key for encryption and another for decryption
A single key for both encryption and decryption
No key at all
What is a major risk with symmetric encryption?
It only works for long messages
The key can be intercepted or duplicated
It cannot be used online
It takes too long to encrypt messages
What makes asymmetric encryption more secure?
It doesn’t use keys
The keys are physical objects
You can’t derive one key from the other
Messages are encrypted with voice commands
What is a public key used for in asymmetric encryption?
To decrypt any message
To sign legal documents
To encrypt messages sent to the key owner
To store passwords
What is the purpose of a private key in asymmetric encryption?
To share it freely with others
To decrypt messages encrypted with the public key
To generate new messages
To store the sender’s address
What does it mean if a message is encrypted with someone’s private key and can be decrypted using their public key?
The message is compressed
The message is invalid
The message’s authenticity can be verified
The message has been duplicated
Why is a 256-bit encryption key considered secure?
It can be easily guessed by a computer
It changes every second
It has an astronomical number of combinations, making it nearly impossible to brute-force
It self-destructs after use
