Question 1 Suppose you have the following 64-bit block: {1, 1, 0, 0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 1, 0, 0, 0, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1}. This 64-bit block is the input of the first round in DES, that is (L0,R0). What are the first 32 bits of the output of the first round?

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

Question 2

Suppose you have the following 64-bit block: {0, 1, 1, 0, 0, 1, 0, 0, 1, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 0, 0, 0, 1, 1, 0, 0, 1, 1, 1, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 0, 0, 0, 1, 1, 0, 0, 0, 0, 1, 0, 1, 0, 1}. This 64-bit block is the input of the second round in DES, that is (L1,R1). What are the first 32 bits of the output of the second round?

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

Question 3

Suppose you have the following 64-bit block: {0, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0, 1, 0, 0, 0, 1, 0, 1, 1, 0, 1, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 0, 0, 1, 1, 0, 1, 0, 0, 1, 1, 1, 0, 1, 1, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 1, 0, 1}. This 64-bit block is the input of the first round in DES, that is (L0,R0). Suppose also that the output of the function "f" is the following 32-bit block: {0, 1, 0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 0, 1, 1, 1, 0, 0}

What is the output of the first round?

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

Question 4

Suppose you have the following 64-bit block: {1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, 1, 1, 0, 1, 0, 0, 1, 0, 1, 1, 0, 1, 0, 1, 0, 1, 1}. This 64-bit block is the input of the first round in DES, that is (L0,R0). Suppose also that the output of the function "f" is the following 32-bit block: {1, 1, 0, 1, 1, 1, 0, 1, 0, 0, 0, 1, 0, 1, 1, 1, 0, 1, 0, 1, 0, 0, 0, 0, 1, 0, 1, 1, 1, 1, 0, 0}

What is the output of the first round?

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

Question 5

How many rounds does DES have?

	64
	56
	16
	128
	32
	48

Question 6

What are the inputs of the "f" function?

	The first 32 bits of the 64-bit block and a sub-key of 48 bits.
	The first 48 bits of the 64-bit block and a sub-key of 32 bits.
	The last 48 bits of the 64-bit block and a sub-key of 32 bits.
	The last 32 bits of the 64-bit block and a sub-key of 48 bits.
	The last 32 bits of the 64-bit block and a sub-key of 56 bits.

Question 7

What is the output of the "f" function?

	32 bits
	48 bits
	56 bits
	16 bits
	L0 bits
	R0 bits

Question 8

How many sub-keys are generated from the original key k?

	32
	16
	48
	64
	128
	L0,R0