H2 | Computer Science homework help


Question 1 [12 pts]

What is entropy?

Calculate the entropy of a fair die toss.

Calculate the entropy of a biased die, where the probability of landing “6” is 1/2, the probabilities of the others are equal.

Compare the entropies of the fair die and the biased die? What does higher entropy mean?

You can use the Log Base 2 Calculator hosted here:


Use the exponents calculator in this address to verify the number of possible landings of a fair dice, which should be 6.


Question 2 [5 pts]

What is the difference between a RNGS and PRNGS?

Question 3 [10 pts]

Which one is used for assessing the security of a cryptographic algorithm: Informational security or computational security? Why?

Which is of the following statements are correct? Choose more than one.

a. One-time pad is informationally secure.

b. AES algorithm is computationally secure.

c. Organizations should prefer using informationally secure algorithms over computationally secure algorithms as much as they can.

d. A new cipher that is using 5096-bit key and takes 10^10000 years to break in even by the help of parallel computing infrastructure composed of all microprocesses in the world is informationally secure.

Question 4 [8 pts]

Think about two encryption keys with lengths 80-bit and 128-bit, respectively. Assume that the ciphers using these keys are NIST-approved ciphers. What can be said about these keys?

Do both keys provide similar level of security in practical real-world applications? Please justify your answer.

Get 20% Discount on This Paper
Pages (550 words)
Approximate price: -

Try it now!

Get 20% Discount on This Paper

We'll send you the first draft for approval by at
Total price:

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

Quality Essay Help has stood as the world’s leading custom essay writing services providers. Once you enter all the details in the order form under the place order button, the rest is up to us.


Essay Writing Services

At Quality Essay Help, we prioritize on all aspects that bring about a good grade such as impeccable grammar, proper structure, zero-plagiarism and conformance to guidelines. Our experienced team of writers will help you completed your essays and other assignments.


Admission and Business Papers

Be assured that you’ll definitely get accepted to the Master’s level program at any university once you enter all the details in the order form. We won’t leave you here; we will also help you secure a good position in your aspired workplace by creating an outstanding resume or portfolio once you place an order.


Editing and Proofreading

Our skilled editing and writing team will help you restructure you paper, paraphrase, correct grammar and replace plagiarized sections on your paper just on time. The service is geared toward eliminating any mistakes and rather enhancing better quality.


Technical papers

We have writers in almost all fields including the most technical fields. You don’t have to worry about the complexity of your paper. Simply enter as much details as possible in the place order section.