In this question, you need to compute the key computed using the Diffie Hellman key exchanged...
In this question, you need to compute the key computed using the
Diffie Hellman key
exchanged process. Suppose the prime is 31 and the primitive root
is 3. Find the public
keys when the two parties choose 7 and 9 as their private keys.
Next find the shared Key computed by both parties. HINT: Once you
know how to the formula works, it is very
easy to simply use Excel to look for the public keys and to
calculate K. Note excel gives
trouble when the numbers become too large, you need to use the
properties of 'mod' to
bypass that problem)
Homework Answers
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In this question, you need to compute the key computed using the
Diffie Hellman key
exchanged...
Question1: Alice and Bob use the Diffie–Hellman key exchange technique with a common prime q =...
Question1: Alice and Bob use the Diffie–Hellman key exchange technique with a common prime q = 1 5 7 and a primitive root a = 5. a. If Alice has a private key XA = 15, find her public key YA. b. If Bob has a private key XB = 27, find his public key YB. c. What is the shared secret key between Alice and Bob? Question2: Alice and Bob use the Diffie-Hellman key exchange technique with a common...
5. Diffie-Hellman key exchange. Alice and Bob use Diffie-Hellman key exchange protocol to communicate in secret....
5. Diffie-Hellman key exchange. Alice and Bob use Diffie-Hellman key exchange protocol to communicate in secret. They publicly announce a prime number p = 23 and a primitive root r = 5 under modulus 23, Alice picks a secret key a-6 and in turn receive the key ß-19 from Bob (a.) (2 points) What is the key that Alice sends to Bob? b) (2 points) What is the shared secret key?
In a Diffie-Hellman Key Exchange, Martha and John have chosen prime value q = 19 and...
In a Diffie-Hellman Key Exchange, Martha and John have chosen prime value q = 19 and primitive root a = 10. If Martha's secret key is 4 and John's secret key is 6, determine the following three values: The value Martha sends to John. The value John send to Martha The shared key they exchanged.
The Diffie-Hellman public-key encryption algorithm is an alternative key exchange algorithm that is used by protocols...
The Diffie-Hellman public-key encryption algorithm is an alternative key exchange algorithm that is used by protocols such as IPSec for communicating parties to agree on a shared key. The DH algorithm makes use of a large prime number p and another large number, g that is less than p. Both p and g are made public (so that an attacker would know them). In DH, Alice and Bob each independently choose secret keys, ?? and ??, respectively. Alice then computes...
users A and B use the Diffie-Hellman key exchange technique with a common prime p=107 and...
users A and B use the Diffie-Hellman key exchange technique with a common prime p=107 and a primitive root g=5. If user A has private key 112 and publick key 3 and user B has private key 146 and publick key 19 Find the following Ans If user C just joined the group and his private key is 6. what is the security key between A and C? what is the security key between B and C?
The Diffie-Hellman key exchange is vulnerable to the following type of attack. An opponent Carol intercepts Alice’s public value and sends her own public value to Bob. When Bob transmits his public va...
The Diffie-Hellman key exchange is vulnerable to the following type of attack. An opponent Carol intercepts Alice’s public value and sends her own public value to Bob. When Bob transmits his public value, Carol substitutes it with her own and sends it to Alice. After this exchange, Carol simply decrypts any messages sent out by Alice or Bob, and then reads and possibly modifies them before re-encrypting with the appropriate key and transmitting them to the other party. Choose all...
just need help with part c key and public key cryptography methods 2. (a) Explain the...
just need help with part c
key and public key cryptography methods 2. (a) Explain the difference between the symmetric (b) In the famou s RSA algorithm for public key cryptography, very large prime numbers are used so as to make ult for the attackers to find from their product the prime factors. However, for an illustration of the ideas behind the RSA algorithm, you could chooses two small prime numbers 7 and 11, and a public key e 13...
I have to modify a server program and chat program to work as the following instructions...
I have to modify a server program and chat program to work as the following instructions but I am completely clueless as to where to start. I'd appreciate any help on how to atleast get started. This must be done in java. Diffie-Hellman Two parties use a key agreement protocol to generate identical secret keys for encryption without ever having to transmit the secret key. The protocol works by both parties agreeing on a set of values (a) and (q)....
Write code for RSA encryption package rsa; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class RSA...
Write code for RSA encryption package rsa; import java.util.ArrayList; import java.util.Random; import java.util.Scanner; public class RSA { private BigInteger phi; private BigInteger e; private BigInteger d; private BigInteger num; public static void main(String[] args) { Scanner keyboard = new Scanner(System.in); System.out.println("Enter the message you would like to encode, using any ASCII characters: "); String input = keyboard.nextLine(); int[] ASCIIvalues = new int[input.length()]; for (int i = 0; i < input.length(); i++) { ASCIIvalues[i] = input.charAt(i); } String ASCIInumbers...
Use C++ forehand e receiver creates a public key and a secret key as follows. Generate...
Use C++
forehand e receiver creates a public key and a secret key as follows. Generate two distinct primes, p andq. Since they can be used to generate the secret key, they must be kept hidden. Let n-pg, phi(n) ((p-1)*(q-1) Select an integer e such that gcd(e, (p-100g-1))-1. The public key is the pair (e,n). This should be distributed widely. Compute d such that d-l(mod (p-1)(q-1). This can be done using the pulverizer. The secret key is the pair (d.n)....
5. Diffie-Hellman key exchange. Alice and Bob use Diffie-Hellman key exchange protocol to communicate in secret. They publicly announce a prime number p = 23 and a primitive root r = 5 under modulus 23, Alice picks a secret key a-6 and in turn receive the key ß-19 from Bob (a.) (2 points) What is the key that Alice sends to Bob? b) (2 points) What is the shared secret key?
just need help with part c
key and public key cryptography methods 2. (a) Explain the difference between the symmetric (b) In the famou s RSA algorithm for public key cryptography, very large prime numbers are used so as to make ult for the attackers to find from their product the prime factors. However, for an illustration of the ideas behind the RSA algorithm, you could chooses two small prime numbers 7 and 11, and a public key e 13...
Use C++
forehand e receiver creates a public key and a secret key as follows. Generate two distinct primes, p andq. Since they can be used to generate the secret key, they must be kept hidden. Let n-pg, phi(n) ((p-1)*(q-1) Select an integer e such that gcd(e, (p-100g-1))-1. The public key is the pair (e,n). This should be distributed widely. Compute d such that d-l(mod (p-1)(q-1). This can be done using the pulverizer. The secret key is the pair (d.n)....
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