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WorksheetsiGCSE Cryptography (2023 onwards)
Total questions: 10
Worksheet time: 20mins
When carrying out asymmetric encryption, which of the following users would keep the private key?
the sender
the receiver
both sender and receiver
all recipients of the message
In Encryption, which of the following is the term used to describe the message before it is encrypted?
simpletext
notext
plaintext
ciphertext
Which of the following is the biggest disadvantage of using symmetric encryption?
it is very complex and time consuming to encode
it is rarely used anymore
it only works on computers with older operating systems
there is a security problem when transmitting the encryption key
which method of cryptography is used in https
symmetric key encryption
asymmetric key encryption
same key encryption
caesar cipher
What is meant by the term ciphertext when used in encryption?
an encryption or decryption algorithm
an encrypted message
a type of session key
another name for plaintext
An encryption algorithm transforms plain text into:
Cipher text
Simple Text
Empty Text
Plain Text
A cipher is _________________________.
a person who makes up secret codes
an algorithm that is used to scramble text so that it can be passed in secret
a lock that can be used to lock a message in a lock box
any puzzle, such as a crossword or Sudoku puzzle
The process of converting a ciphertext into plaintext.
encryption
decryption
plaintext
cryptography
What is a key in cryptography?
algorithm for transforming plaintext to ciphertext
info used in cipher known only to sender/receiver
•recovering ciphertext from plaintext
•converting plaintext to ciphertext
