Codebusters Test Graduation Requirements 2

Question 1

At the invitational and regional levels of Codebusters, which cipher type is NOT typically included in the graduation requirements?

Accepted Answer

RSA public-key cipher

Answer

Aristocrat

Answer

Caesar cipher

Answer

Xenocrypt

Question 2

In Codebusters scoring, what is the standard penalty applied for an incorrect letter submission on a running key or Vigenere cipher?

Accepted Answer

10 points deducted per wrong letter

Answer

5 points deducted per wrong letter

Answer

The entire cipher scores zero

Answer

No penalty; partial credit is awarded

Question 3

Which of the following best describes the 'Xenocrypt' cipher that appears in Codebusters graduation requirements at the national level?

Accepted Answer

A monoalphabetic substitution cipher in Spanish

Answer

A cipher using numbers instead of letters

Answer

A polyalphabetic cipher using a keyword

Answer

A transposition cipher with a geometric grid

Question 4

To graduate from the invitational division to the regional division in Codebusters, teams must demonstrate proficiency in how many members per team?

Accepted Answer

3 members

Answer

2 members

Answer

4 members

Answer

5 members

Question 5

When completing a Baconian cipher for Codebusters graduation requirements, what is the alphabet size used in the standard two-alphabet version?

Accepted Answer

24 letters (I=J, U=V)

Answer

20 letters

Answer

25 letters (I=J)

Answer

26 letters

Question 6

Which index of coincidence (IC) value indicates a monoalphabetic substitution cipher in English, a key graduation requirement skill?

Accepted Answer

0.065

Answer

0.038

Answer

0.045

Answer

0.077

Question 7

In Codebusters, the 'timed question' at the end of the test is worth how many additional points if answered correctly within the time limit?

Accepted Answer

10 points

Answer

5 points

Answer

15 points

Answer

20 points