Question

In: Computer Science

RSA: Alice wishes to send Bob the message POET. Suppose Bob chooses P = 29, Q...

RSA:

Alice wishes to send Bob the message POET. Suppose Bob chooses P = 29, Q = 31, E = 47, and D = 143.

Show the steps that Alice uses to encrypt the message POET (use the ascii values of the letters P, O, E, and T), and how Bob decrypts the message he receives from Alice.

You will be generating very large numbers, and will find the following calculator helpful:

https://www.calculator.net/big-number-calculator.html

Solutions

Expert Solution

  • First of all encrypt the message at sender.
  • Decrypt the message at receiver.
  • At last verify both are same or different.

Related Solutions

Alice wants to send a plaintext message m = 10 to Bob secretly using RSA public...
Alice wants to send a plaintext message m = 10 to Bob secretly using RSA public key cryptosystem. Bob selects p = 7, and q = 13 with e = 5. You have to perform following tasks: a. Compute and list Bob’s public and private keys. b. Compute the ciphertext that Alice will send to Bob using plaintext message m = 10. c. Recover the actual plaintext from the ciphertext sent by Alice
Suppose Alice is using a block cipher to send the message THE ORDER IS KARL, ANDY,...
Suppose Alice is using a block cipher to send the message THE ORDER IS KARL, ANDY, FRED AND IAN. IAN AND ANDY HAVE LEFT. to Bob. Assume that the block cipher is used in ECB mode, the English is divided into plaintext blocks of 2 letters (ignore spaces and punctuation) the ciphertext blocks are denoted C1,C2,...,C23 (a) Write down the 23 plaintext blocks. (b) Will any of the ciphertext blocks be repeated? If so, which ones? (c) Suppose an attacker...
How to generate a key pair for Alice and Bob Respectively Suppose Alice sends plaintext P=...
How to generate a key pair for Alice and Bob Respectively Suppose Alice sends plaintext P= 113, how does she encrypt and whats the ciphertext C? After Bob receives C, how does he decrypts it to get the plaintext P? Suppose Alice sends plaintext P= 113, how does she sign it and what are sent to Bob. How does Bob verify the signature? Suppose Bob sends plaintext P=113, how does he sign it and what are sent Alice. How does...
Answer digital signatures question. assume Alice has the RSA key (eA, dA, nA) and Bob has...
Answer digital signatures question. assume Alice has the RSA key (eA, dA, nA) and Bob has the RSA key(eB, dB, nB), where eA, eB, nA, and nB are public, dA is known only to Alice, and dB is known only to Bob. (a) Describe how Alice could use her RSA key to sign a public message m, and explain why this approach satisfies the objective of non repudiation. (b) Describe how Alice could encrypt and send a secret message to...
Suppose Alice flips 4 coins and Bob flips 4 coins. Find the probability that Alice and...
Suppose Alice flips 4 coins and Bob flips 4 coins. Find the probability that Alice and Bob get the exact same number of heads.
Consider an RSA system with p = 7109 and q = 7919. Generate a public and...
Consider an RSA system with p = 7109 and q = 7919. Generate a public and private key pair based on the given p and q. Show the STEPS
QUESTION 26 Consider RSA with p = 7 and q = 11. What are n and...
QUESTION 26 Consider RSA with p = 7 and q = 11. What are n and z? n z 4 points    QUESTION 27 Put the following wireless encryption protocols in order from most secure to least secure.       -       1.       2.       3.          WPA       -       1.       2.       3.          WEP       -       1.       2.   ...
In the Diffie-Hellman key exchange, Alice sends g^x mod p to Bob, and Bob sends g^y...
In the Diffie-Hellman key exchange, Alice sends g^x mod p to Bob, and Bob sends g^y mod p to Alice. (1) How do they get a common secret? (2) Suppose an attacker is intercepting their communication, and gets to know g, p, and g^x mod p. Why can’t the attacker figure out x from these data?
1. Suppose that Alice is rushing past Bob at a velocity u, and she carries with...
1. Suppose that Alice is rushing past Bob at a velocity u, and she carries with her a block of transparent material with index of refraction n. If she shines light through that material then she sees the light moving through it with a velocity c/n. What speed does Bob see the light move through that material? Check that your result has the correct limiting behavior that when n = 1, and u << c/n! 2. An unstable particle of...
Write C program for RSA encryption and decryptin, where: p = 11,q = 5, e =...
Write C program for RSA encryption and decryptin, where: p = 11,q = 5, e = 7
ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT