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# in the rsa algorithm, we select 2 random large values ‘p’ and ‘q’. which of the following is the property of ‘p’ and ‘q’?

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### Mohammed

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## In the RSA algorithm, we select 2 random large values ‘p’ and ‘q’. Which of the following is the property of ‘p’ and ‘q’?

In the RSA algorithm, we select 2 random large values ‘p’ and ‘q’. Which of the following is the property of ‘p’ and ‘q’? p and q should be divisible by Ф(n) p and q should be co-prime p and q should be prime p/q should give no remainder. Cryptography and Network Security Objective type Questions and Answers.

## Discussion Forum

Que. In the RSA algorithm, we select 2 random large values ‘p’ and ‘q’. Which of the following is the property of ‘p’ and ‘q’?

a. p and q should be divisible by Ф(n)

b. p and q should be co-prime

c. p and q should be prime

d. p/q should give no remainder

Answer:p and q should be prime

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In the RSA algorithm, we select 2 random large values ‘p’ and ‘q’. Which of the following is the property of ‘p’ and ‘q’?

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p and q should be prime

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## Cryptography Online Test

This set of Cryptography online test focuses on “Knapsack/ Merkle – Hellman/ RSA Cryptosystem”. 1. Find the ciphertext for the message {100110101011011} using superincreasing sequence { 1, 3, 5, 11, 35 } and private keys a = 5 and m=37. a) C = ( 33, 47, 65 ) b) C = ( 65, 33, 47 ... Read more

## Asymmetric Ciphers Questions and Answers – Knapsack/ Merkle – Hellman/ RSA Cryptosystem – II

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This set of Cryptography online test focuses on “Knapsack/ Merkle – Hellman/ RSA Cryptosystem”.

1. Find the ciphertext for the message {100110101011011} using superincreasing sequence { 1, 3, 5, 11, 35 } and private keys a = 5 and m=37.

a) C = ( 33, 47, 65 )

b) C = ( 65, 33, 47 )

c) C = ( 47, 33, 65 )

d) C = ( 47, 65, 33 )

2. Suppose that plaintext message units are single letters in the usual 26-letter alphabet with A-Z corresponding to 0-25. You receive the sequence of ciphertext message units 14, 25, 89. The public key is the sequence {57, 14, 3, 24, 8} and the secret key is b = 23, m = 61.

Decipher the message. The Plain text is

3. RSA is also a stream cipher like Merkel-Hellman.

Check this: Computer Science MCQs | Cyber Security MCQ

4. In the RSA algorithm, we select 2 random large values ‘p’ and ‘q’. Which of the following is the property of ‘p’ and ‘q’?

a) p and q should be divisible by Ф(n)

b) p and q should be co-prime

c) p and q should be prime

d) p/q should give no remainder

5. In RSA, Ф(n) = _______ in terms of p and q.

6. In RSA, we select a value ‘e’ such that it lies between 0 and Ф(n) and it is relatively prime to Ф(n).

7. For p = 11 and q = 19 and choose e=17. Apply RSA algorithm where message=5 and find the cipher text.

8. For p = 11 and q = 19 and choose d=17. Apply RSA algorithm where Cipher message=80 and thus find the plain text.

9. USENET falls under which category of public key sharing?

a) Public announcement

b) Publicly available directory

c) Public-key authority

d) Public-key certificates

Perform encryption on the following PT using RSA and find the CT.

10. p = 3; q = 11; M = 5

11. p = 5; q = 11; M = 9

12. p = 7; q = 11; M = 8

13. p = 11; q = 13; M = 7

14. p = 17; q = 31; M = 2

15. n = 35; e = 5; C = 10. What is the plaintext (use RSA) ?

Sanfoundry Global Education & Learning Series – Cryptography and Network Security.

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Mohammed 14 day ago

Guys, does anyone know the answer?