Font size
WorksheetsEncryption Quiz
Total questions: 15
Worksheet time: 10mins
What is meant by the term ciphertext when used in encryption?
an encryption or decryption algorithm
a message before it has been encrypted
a type of session key
another name for plaintext
text following an encryption algorithm
Which one of the following statements about asymmetric encryption is true?
uses a public key only
uses both a public key and a private key
always uses 64-bit encryption
the value of the private key is symmetrical
uses private key only
In encryption, which of the following is the term used to describe the message before it is encrypted?
simpletext
plaintext
notext
ciphertext
firsttext
Which of the following is the biggest disadvantage of using symmetric encryption?
it is very complex and time consuming
it is rarely used anymore
the value of the key reads the same in both directions
it only works on computers with older operating systems
there is a security problem when transmitting the encryption key
Which of the following is the correct name for a form of encryption in which both the sender and the recipient use the same key to encrypt and decrypt?
symmetric key encryption
asymmetric key encryption
public key encryption
same key encryption
block cipher encryption
Which of the following is the final number in a code, calculated from all the numbers in the code, whose purpose is to find errors in data entry?
parity check
checksum
cyclic redundancy check
parity bit
check digit
Which of the following is a form of error detection that makes use of a system of acknowledgements and timeouts?
automatic repeat request
echo check
check digit
parity bit
cyclic redundancy check
Which of the following methods uses an extra bit added to a byte to ensure it contains an even number of 1s or odd number of 1s?
cyclic redundancy check
parity check
checksum
check digit
echo check
Which of the following uses a calculated value which is sent after a block of data: the receiving computer also calculates the value from the block of data and compares the values?
parity check
check digit
packet switching
checksum
automatic repeat request
Which of the following describes the check where the receiving computer sends back a copy of the data to the sending computer to allow it to compare the data?
echo check
automatic repeat request
checksum
parity check
check digit
Asymmetric Encryption makes use of a public key and a (a) key.
(a) refers to encrypted data that is the result of putting a plaintext message through an encryption algorithm
(a) a type of encryption key which is known only to the single computer/user
(a) a type of encryption key that is known to all users
(a) is a type of encryption in which the same encryption key is used both
to encrypt and decrypt a message
