Question 1

How many sub-keys are generated in the key schedule for DES?

Question 1 options:

	56
	64
	16
	32
	8
	128

Question 2

What is the real size of the key in DES?

Question 2 options:

	56 bits
	64 bits
	32 bits
	28 bits
	42 bits
	64 and 56 bits

Question 3

Suppose we have the following 64-bit block: {0, 1, 1, 1, 0, 1, 1, 1, 1, 0, 1, 1, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 0, 1}

What is the output of PC-1?

Write the numbers separated with commas, leave one space after every comma. Do NOT use "{" or "}" in the answer.

Question 4

Question 4 options:

Suppose we have the following 64-bit block: {0, 1, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 1, 1, 0, 1, 1, 0, 0, 1}

What is the output of PC-1?

Write the numbers separated with commas, leave one space after every comma. Do NOT use "{" or "}" in the answer.

Question 5

Suppose we have the following 56-bit block: {1, 1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 1, 1, 1, 1, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 1, 1, 1, 0, 0, 0, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1}

What is the output of PC-2?

Write the numbers separated with commas, leave one space after every comma. Do NOT use "{" or "}" in the answer.

Suppose we have the following 56-bit block: {0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 0}

What is the output of PC-2?

Write the numbers separated with commas, leave one space after every comma. Do NOT use "{" or "}" in the answer.