
UNIT 1 QUIZZ
Quiz
•
Computers
•
University
•
Practice Problem
•
Hard
Saranya Raja
Used 4+ times
FREE Resource
Enhance your content in a minute
20 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Use Caesar’s Cipher to decipher the following
HQFUBSWHG WHAW
ABANDONED LOCK
ENCRYPTED TEXT
ABANDONED TEXT
ENCRYPTED LOCK
2.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Monoalphabetic ciphers are stronger than Polyalphabetic ciphers because frequency analysis is tougher on the former.
True
False
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
On Encrypting “thepepsiisintherefrigerator” using Vignere Cipher System using the keyword “HUMOR” we get cipher text
abqdnwewuwjphfvrrtrfznsdokvl
abqdvmwuwjphfvvyyrfznydokvl
tbqyrvmwuwjphfvvyyrfznydokvl
baiuvmwuwjphfoeiyrfznydokvl
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In brute force attack, on average half of all possible keys must be tried to achieve success.
True
False
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
If the sender and receiver use different keys, the system is referred to as conventional cipher system.
True
False
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
An encryption scheme is unconditionally secure if the ciphertext generated does not contain enough information to determine uniquely the corresponding plaintext, no matter how much cipher text is available.
True
False
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
_______________________ is a term used in cryptography that refers to a message before encryption or after decryption.
Cipher Text
Plain Text
Cipher Script
Plain Script
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