﻿ I need some assistance with these assignment. cryptosystems based on discrete logarithm Thank you in advance for the help! - Ray writers

# I need some assistance with these assignment. cryptosystems based on discrete logarithm Thank you in advance for the help!

I need some assistance with these assignment. cryptosystems based on discrete logarithm Thank you in advance for the help! Rather it will be sent as the binary string corresponding to another number which depends on the number 161 according to some fixed rule. For example we can subtract 161 from the largest 3-digit number 999 and send the result 838. Thus the rule for encryption is:But there is a drawback of using this method of encryption. The receiver has also to be conveyed what rule has been used for the encryption, so that he can decrypt it. If some hacker in between cracks the information about this rule, then it is a trivial job for him to get the number 161 back from 838. For, he will easily deduce from this rule for encryption, the rule for decryption:Therefore we make use of an ingenious technique. This technique makes the decryption of the encrypted message very difficult (if not impossible) for any third person (hacker). In order to know the technique, we need to learn some of the mathematical concepts. So first of all we take up these.Given two natural numbers and an integer n, then by the modular exponentiation of b to the base a, which is symbolized as, we mean obtaining the remainder on dividing. Thus, for example,, on being evaluated yields 7. Observe that we can also write using the above concept of congruence modulo m.Further given two natural numbers and an integer n, then the smallest (non-negative) integer x (if exists) such that, is known as the discrete logarithm of b to the base a. (http://www.math.clemson.edu…, 1)To find the modular exponentiation is an easy task even if the numbers a and b are large. For, we can make use of the ‘square and multiply method’ (Schneier, 244) as explained in what follows: We know that stands for the remainder obtained on dividing by n. For large values of a and b, it will be very difficult to evaluate the expression. But to evaluate is much easier. For we can find the remainder (say) on dividing, multiply and obtain the remainder (say) on dividing the product by n. and so on till the number a is taken b times for the multiplication and thus the last remainder is obtained. As an illustration let us compute. Let us find the remainder on dividing. we get 1. Then find the remainder on dividing 1.3 (=3) by 8. we get 3. Now find the remainder on dividing 3.3 (=9) by 8. we get 1. Again find the remainder on dividing 1.3 (=3) by 8. we get 3. Finally find the remainder on dividing 3.3 (=9) by 8. we get 1, which is the result of the modular exponentiation. For the sake of verification we can compute. It comes out 729. On dividing 729 by 8 we get 1, the same result. However, to find the discrete logarithm for large numbers is a very hard problem by any means. So if we base the cryptosystem on the discrete logarithm, it becomes extremely hard for a hacker to crack it. Now we will describe this system. The basic work for the development of the system was done by Diffie and Hellman in 1976, but the system was fully developed by ElGamal. ((http://www.math.clemson.

Don't use plagiarized sources. Get Your Custom Essay on
I need some assistance with these assignment. cryptosystems based on discrete logarithm Thank you in advance for the help!
Just from \$10/Page

## Calculate the price of your order

550 words
We'll send you the first draft for approval by September 11, 2018 at 10:52 AM
Total price:
\$26
The price is based on these factors:
Number of pages
Urgency
Basic features
• Free title page and bibliography
• Unlimited revisions
• Plagiarism-free guarantee
• Money-back guarantee
On-demand options
• Writer’s samples
• Part-by-part delivery
• Overnight delivery
• Copies of used sources
Paper format
• 275 words per page
• 12 pt Arial/Times New Roman
• Double line spacing
• Any citation style (APA, MLA, Chicago/Turabian, Harvard)

# Our guarantees

Delivering a high-quality product at a reasonable price is not enough anymore.
That’s why we have developed 5 beneficial guarantees that will make your experience with our service enjoyable, easy, and safe.

### Money-back guarantee

You have to be 100% sure of the quality of your product to give a money-back guarantee. This describes us perfectly. Make sure that this guarantee is totally transparent.

### Zero-plagiarism guarantee

Each paper is composed from scratch, according to your instructions. It is then checked by our plagiarism-detection software. There is no gap where plagiarism could squeeze in.

### Free-revision policy

Thanks to our free revisions, there is no way for you to be unsatisfied. We will work on your paper until you are completely happy with the result.