WorksheetsCNS-module 1
Total questions: 11
Worksheet time: 4mins
Student class
S7R1
S7R2
Input message in Cryptography is called;
Plain text
Cipher Text
Plain and cipher
None of the above
Rail Fence Technique is an example of
Substitution
Transposition
Product cipher
Caesar cipher
The process to discover plain text or key is known as:
Crypto design
Crypto processing
Cryptanalysis
Crypto graphic
The key length in DES algorithm is__________
32
48
56
64
One Time Pad is also known as
Playfair cipher
Hill cipher
Vigenere Cipher
Perfect Secrecy
The DES process involves ____ number of rounds.
8
12
16
32
_______ operates on smaller unit of plain text.
Block cipher
Stream cipher
Rail fence
Both (a) and (b)
The process of writing the text as rows and read it as columns is known as
Caesar cipher
Vernam cipher
Transposition columnar cipher
Homophonic substitution cipher
Use Caesar’s Cipher to decipher the following
HQFUBSWHG WHAW
ABANDONED LOCK
ENCRYPTED TEXT
ABANDONED TEXT
ENCRYPTED LOCK
_______ is based on the idea of hiding the relationship between the cipher text and the Key
Diffusion
Confusion
Both (a) and (b)
None of these
