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WorksheetsICS - Q1 & Q2 Weeks 1-6
Total questions: 75
Worksheet time: 1hrs 1mins
What is encryption?
The process of unscrambling a message to make it readable
The process of changing a message to hide the original text
The process of intercepting a message and decoding it
The process of sending a message over shared wires and connections
What is decryption?
The process of unscrambling a message to make it readable
The process of changing a message to hide the original text
The process of intercepting a message and decoding it
The process of sending a message over shared wires and connections
What is Caesar's Cipher?
An algorithm that encrypts messages using a 10-digit key
An algorithm that encrypts messages using a public key
An algorithm that substitutes each letter in the original message with a letter a certain number of steps down the alphabet
An algorithm that encrypts messages using a 256-bit key
What is the problem with Caesar's Cipher?
It can only encrypt short messages
It can only encrypt messages with a specific key length
It can be easily cracked by trying every possible key
It can only be decrypted by a computer with access to the private key
What is symmetric encryption?
Encryption where a private key is used to decrypt data
Encryption where a public key is used to encrypt data
Encryption where each letter in the message is shifted by a different amount
Encryption where the sender and receiver share the same key
What is asymmetric encryption?
Encryption where the sender and receiver share the same key
Encryption where each letter in the message is shifted by a different amount
Encryption where the sender and the recipient use two different keys
Encryption where a private key is used to decrypt data
What is the purpose of public key cryptography?
To encrypt data using a shared key
To intercept and decode messages
To decrypt data using a shared key
To exchange secure messages without needing to agree on a private key
What security protocols use public key encryption?
SSL and TLS
Symmetric encryption
Caesar's Cipher
256-bit encryption
What does the little lock or the letters https in a browser's address bar indicate?
The use of symmetric encryption
The use of asymmetric encryption
The use of private key encryption
The use of public key encryption
Why is it important to develop new encryption methods?
To make encryption harder for computers to break
To make encryption harder for humans to break
To make encryption accessible to everyone
To make encryption faster and more efficient
Encrypt with a shift of +2:
Hello
(a)
Encrypt with a shift of -3:
Hello
(a)
Decrypt with a shift of -2:
Dqcv
(a)
Decrypt with a shift of -4:
Wxeki
(a)
Decrypt (shift unknown):
aliip
(a)
