Is it possible to perform encryption operations in parallel on multiple blocks of plaintext in CBC mode? How about decryption?  Using the RSA algorithm, perform encryption and decryption for the following:  P=7; q=11, e=17; M = 8 P=17; q=31, e=7; M=2

4. Using the RSA public key cryptosystem, with a = 1, b= 2, ..., y= 25, z = 26. •... a. If p= 5 and q = 13, list five legal values for d. b. If p= 5, q = 31, and d= 37, find e. c. Using p = 3, q = 11, and d=9, find e and encrypt "hello". Solve a, b, c respectively. Solution:

Do not copy other's work. Show your own

Suppose Bob uses the RSA cryptosystem with a very large modulus n for which the factorization cannot be found in a reasonable amount of time. Suppose Alice sends a message to Bob by representing each alphabetic character as an integer between 0 and 25 (A -> 0 , … , Z -> 25) and then encrypting each number separately using RSA with large e and large n. Is this method secure? If not, describe the most efficient attack against this encryption method.

Consider the case of Alice sending a message, m, to Bob. Both Alice and Bob use public key cryptography and each has a public and private key as described in the text.  The figure attached below shows the operations that Alice must perform to provide confidentiality, authentication, and integrity when sending a message to Bob over the network. We can use either symmetric key or public key cryptography to encrypt a message.  For our purposes, either technique will encrypt the message, and applying both doesn't make it "more secure".  Also, we can assume that the session key would remain a secret so the fact that it is discarded does not make it "more secure".  Why do we use a session key, Ks, instead of relying only on public key Cryptography?  In other words, why do we use both public key and symmetric key cryptography?

Please explain the problem in detail so that I can understand.

Modify question 2 from Lab 2 such that if the value for Celsius is 100 or more, also display “Above or equalBoiling point of Water”Otherwise, display “BelowBoiling point of Water” python coding

Show all of the steps needed to encrypt and decrypt the ASCII message “YES” without a modular arithmetic calculator in an RSA cipher with public key (143, 7).

Perform encryption and decryption using the RSA algorithm for the following. Show allyour steps.1. p = 3; q = 11, e = 7; M = 52. p = 5; q = 11, e = 3; M = 9

Perform encryption and decryption using the RSA algorithm for the letter "S". Show all steps in details when p=5 , q=7 , e=5.