Cryptography & Codes

Intense Cryptogram Assault: Elite Decryption Quiz

Confront formidable codes and cryptosystems in this punishing 10-question gauntlet designed for veteran codebreakers.

#cryptanalysis#Enigma rotors#RSA flaws#ADFGVX grid#IC calculation#Kasiski exam#Playfair rules#Hill matrices#Vigenere analysis#cipher decryption

Quiz Intelligence

Total Questions

Difficulty Level

hard

Progress

0/0

Quiz Questions

Answer all questions below and test your knowledge.

1
In Kasiski's method for Vigenere ciphers, repeated plaintext sequences appear in ciphertext separated by multiples of what?
Question 1
2
For a 2x2 Hill cipher matrix to decrypt uniquely modulo 26, its determinant must be
Question 2
3
Playfair cipher digraphs with identical letters (not at word end) insert which filler before forming rectangle?
Question 3
4
Standard Enigma machine (Wehrmacht) used how many movable rotors selected from a set of eight?
Question 4
5
Index of coincidence for English plaintext approximates what value, versus 1/26 for random?
Question 5
6
Baconian cipher encodes 24 letters using binary sequences of length
Question 6
7
ADFGVX cipher (WWI German) fractionates plaintext via a
Question 7
8
DES algorithm performs how many Feistel rounds on 64-bit blocks with 56-bit key?
Question 8
9
RSA with small public exponent e=3 lacks padding, vulnerable primarily to
Question 9
10
One-time pad achieves information-theoretic security only if key satisfies all except
Question 10

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Intense Cryptogram Assault: Elite Decryption Quiz

Quiz Intelligence

Quiz Questions

In Kasiski's method for Vigenere ciphers, repeated plaintext sequences appear in ciphertext separated by multiples of what?

For a 2x2 Hill cipher matrix to decrypt uniquely modulo 26, its determinant must be

Playfair cipher digraphs with identical letters (not at word end) insert which filler before forming rectangle?

Standard Enigma machine (Wehrmacht) used how many movable rotors selected from a set of eight?

Index of coincidence for English plaintext approximates what value, versus 1/26 for random?

Baconian cipher encodes 24 letters using binary sequences of length

ADFGVX cipher (WWI German) fractionates plaintext via a

DES algorithm performs how many Feistel rounds on 64-bit blocks with 56-bit key?

RSA with small public exponent e=3 lacks padding, vulnerable primarily to

One-time pad achieves information-theoretic security only if key satisfies all except

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