Worksheets2.3 Encryption Cambridge IGCSE 0478
Total questions: 10
Worksheet time: 5mins
What is the main purpose of encryption?
To protect data by making it unreadable to unauthorized users
To increase the speed of data transmission
To reduce the size of transmitted data
To convert data into binary before sending
What happens if data is transmitted without encryption?
It can be intercepted, modified, or stolen
It will be automatically compressed
It cannot be transmitted at all
It will take longer to reach the recipient
Which of the following statements about symmetric encryption is correct?
It uses the same key for both encryption and decryption
It uses a public key for encryption and a private key for decryption
It is less efficient than asymmetric encryption
It does not require the sender and receiver to share a key
Which encryption method uses a public key and a private key?
Asymmetric encryption
Symmetric encryption
Parity check
Checksum
In asymmetric encryption, which key is used to decrypt the data?
Private key
Public key
Symmetric key
Checksum key
Why is asymmetric encryption more secure than symmetric encryption?
The private key is never shared, reducing the risk of interception
It encrypts data using fewer bits, making it faster
It requires no keys to be exchanged between sender and receiver
The encryption process is reversible without a key
Which of the following is an example of a symmetric encryption algorithm?
AES (Advanced Encryption Standard)
RSA (Rivest-Shamir-Adleman)
SHA (Secure Hash Algorithm)
ECC (Elliptic Curve Cryptography)
Which of the following is an example of an asymmetric encryption algorithm?
RSA (Rivest-Shamir-Adleman)
AES (Advanced Encryption Standard)
RLE (Run-Length Encoding)
DES (Data Encryption Standard)
What is the function of the public key in asymmetric encryption?
It encrypts data that can only be decrypted by the private key
It decrypts data sent by the sender
It is used to check for transmission errors
It is shared secretly between sender and receiver
Why is asymmetric encryption commonly used for secure communication over the internet?
It allows secure data exchange without sharing a secret key
It requires no keys to be exchanged
It makes data transmission faster
It is easier to implement
