UNIT 1 QUIZZ

UNIT 1 QUIZZ

University

20 Qs

quiz-placeholder

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UNIT 1 QUIZZ

UNIT 1 QUIZZ

Assessment

Quiz

Computers

University

Practice Problem

Hard

Created by

Saranya Raja

Used 4+ times

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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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