Question

Alice is sending message “HIDE” to Bob. Perform encryption and decryption using RSA algorithm, with the following information: Parameters p q e 11 5 7 Present all the information that you will need to encrypt and decrypt only the first letter from text.

Answer #1

Need to encrypt and decrypt IDE also just comment

In case have to take like A=0,B=1,.....H=7,...

Like this also comment

Thank you and all the best

Q1: The figure bellow present the two-key method in 3DES.
Indicate in detail what would the result be if :
1. ?=? 13
2. ?=? 12
Q2: Alice is sending message “HIDE” to Bob. Perform encryption
and decryption using RSA algorithm, with the following
information:
Parameters p q e
11 5 7
Present all the information that you will need to encrypt and
decrypt only the first letter from tex ?

Perform encryption and decryption for the RSA algorithm using
these parameters: p = 13; q = 19; e = 5;
Plaintext should be the first three letters of the month you were
born (convert letters to the values 0-25). Note you need to do
three encryptions. Show how decryption works.
The above calculation is performing a cipher on the alphabet. How
does this method compare with a classic cipher?

RSA Cryptography
Perform encryption and decryption to find private decryption key
d.
a. p = 3, q = 13, e = 7
b. p = 787, q = 631, e = 234559

Alice uses RSA to send a key to Bob for use in encryption of
future messages. The key is the word ”CINEMA” and the encoding from
letters to numbers is done using the ASCII: A = 65 ... Z = 90,
space = 99. The public parameters (n, e) = (9379, 11) are shared.
Encrypt Alice’s key word, using 2-letter blocks. Please show
work.

Consider the following two prime numbers and demonstrate RSA
algorithm.
139 and 151
Now consider a message M= 5, encrypt M using the encryption key
and find the encrypted message E
Now decrypt E, using the decryption key.

Below is an example of key generation, encryption, and
decryption using RSA. For the examples below, fill in the
blanks to indicate what each part is or answer the
question.
Public key is (23, 11) What is 23 called?
_______________, What is 11 called?_______________
Private key is (23, 13) What is 23
called?_______________, What is 13
called?_______________
23 can be part of the public key because it is very hard
to _______________ large prime numbers.
ENCRYPT (m) = m^e mod...

Perform encryption using the RSA algorithm for the
following:
p=5, q=9, e=2, M=5
p=4, q=12, e=4, M=3
C=Me mod n
C is the cipher text and M is the plain text, n=p×q

Discrete Math
In this problem, we will implement the RSA algorithm to encrypt
and decrypt the message ”148”.For this exercise, you may want to
use some kind of calculator that can compute the mod function.
1. Set the primes p and q as follows:p=31 and q=47. What are the
values for N and φ?
2.The value for e is chosen to be 11. Use Euclid’s algorithm to
verify that e and φ are relatively prime and to find d, the...

Let p=11, q=17, n = pq = 187. Your (awful) public RSA encryption
key is (e=107, n=187). (a) What is your private decryption key? (b)
You receive the encrypted message: 100 Decrypt the message. (In
other words, what was the original message, before it was
encrypted? Just give me a number, don’t convert it to letters).

Let p=3 and q=17 and let an RSA public-key cryptosystem be
given.
1. Why is the number 8 not a valid encryption-key?
2. We encrypt the number M=8 with the help of the encryption-key
e=3.
Why is the encrypted message C=2?
3. Why is the decryption key d for the encryption-key, (e=3),
equal to 11?
https://en.wikipedia.org/wiki/RSA_(cryptosystem)#Encryption

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