WorksheetsThe Internet: Encryption & Public Keys (watch vid first)
Total questions: 13
Worksheet time: 7mins
Name
Class
Date
1.
What is the significance of SSL and TLS in web browsing?
a)
They allow users to browse anonymously
b)
They store user passwords securely
c)
They speed up the loading of web pages
d)
They protect data during transmission over the internet
2.
What happens when computers become faster regarding encryption?
a)
New methods of encryption will need to be developed
b)
All current encryption methods will become obsolete
c)
Encryption will no longer be necessary
d)
Encryption will become easier to implement
3.
What is a potential issue with using Caesar’s Cipher?
a)
It can be easily broken with a limited number of keys
b)
It requires complex algorithms
c)
It is very slow to encrypt messages
d)
It can only encrypt short messages
4.
What is the primary purpose of encryption?
a)
To hide the original text of a message
b)
To speed up data transfer
c)
To reduce file sizes
d)
To make data publicly accessible
5.
Which cipher is known for substituting letters in a message?
a)
Caesar’s Cipher
b)
Vigenère Cipher
c)
RSA Encryption
d)
AES Encryption
6.
How many possible keys are there in a 256-bit encryption?
a)
Trillions of trillions of trillions
b)
Only 256
c)
A few hundred
d)
Less than a thousand
7.
What does the term 'key' refer to in encryption?
a)
A hardware component for encryption
b)
A type of computer virus
c)
A code to access the internet
d)
A method to unlock encrypted messages
8.
What is symmetric encryption?
a)
When encryption is done without any algorithm
b)
When different keys are used for encryption and decryption
c)
When no keys are used
d)
When the same key is used for both encryption and decryption
9.
What is asymmetric encryption?
a)
Using multiple keys for a single message
b)
Using no keys at all
c)
Using the same key for both encryption and decryption
d)
Using a public key for encryption and a private key for decryption
10.
What does the public key allow someone to do?
a)
Encrypt a message to send securely
b)
Decrypt a message they received
c)
Access private data without permission
d)
Create a new encryption algorithm
11.
What is the main advantage of using asymmetric encryption over symmetric encryption?
a)
It allows secure communication without needing to share a private key beforehand.
b)
It is easier to understand and implement than symmetric encryption.
c)
It requires less computational power to encrypt messages.
d)
It can only be used for small amounts of data.
12.
What is the main difference between symmetric and asymmetric encryption?
a)
Symmetric encryption uses a single key for both encryption and decryption, while asymmetric encryption uses a pair of keys: a public key and a private key.
b)
Symmetric encryption is faster than asymmetric encryption because it uses longer keys.
c)
Asymmetric encryption requires both parties to meet in private to agree on a key, while symmetric encryption does not.
d)
Symmetric encryption can only be used for small amounts of data, while asymmetric encryption can handle larger data sizes.
13.
What is the main function of a public key in asymmetric encryption?
a)
It decrypts messages encrypted with the private key.
b)
It is used to encrypt messages that anyone can send.
c)
It scrambles messages before they are sent over the internet.
d)
It is a secret key only known to the sender and receiver.
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