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52. In an RSA system, the public key of a given user is e = 31, n = 3599. What is the φ(n)? 3480
53. Which of the statement(s) is(are) properties for p and q?
A. p and q are distinct
B. p and q are prime
C. p and q should be of similar bit length
D. p is greater than q
E. p = q -1
54. Which one of the statement is a formula to find cipher in RSA?
A. <i>c</i> = <i>m<i/> <sup>e</sup> (mod <i>n</i>).
B. <i>c</i> = <i>m<i/> <sup>d</sup> (mod <i>n</i>).
C. <i>c</i> = <i>m<i/> <sup>n</sup> (mod <i>e</i>).
D. <i>c</i> = <i>m<i/> <sup>n</sup> (mod <i>d</i>).
E. <i>c</i> = <i>m<i/> <sup>e</sup> (mod <i>d</i>).
55. Which one of the statement is a formula to find plain in RSA?
A. <i>m</i> = <i>c<i/> <sup>e</sup> (mod <i>n</i>).
B. <i>m</i> = <i>c<i/> <sup>d</sup> (mod <i>n</i>).
C. <i>m</i> = <i>c<i/> <sup>n</sup> (mod <i>e</i>).
D. <i>m</i> = <i>c<i/> <sup>n</sup> (mod <i>d</i>).
E. <i>m</i> = <i>c<i/> <sup>e</sup> (mod <i>d</i>).
56. Which one of the statement is equation for φ(n)?
A. φ(n) = (p)(q – 1)
B. φ(n) = (p – 1)(q)
C. φ(n) = (p – q)(q – 1)
D. φ(n) = (p – 1)(q – 1)
E. φ(n) = pq
57. In a public-key system using RSA, you intercept the ciphertext C = 10 sent to a user whose public key is e = 5, n = 35. What is the value of p and q?
A. p = 6, q = 8
B. p = 1, q = 35
C. p = q = n = 35
D. p = 5, q = 7
E. p = q = e = 5
58. In an RSA system, the public key of a given user is e = 31, n = 3599. What is the value of p and q?
A. p = 61, q = 59
B. p = 62, q = 60
C. p = 1, q = 3599
D. p = q = n = 3599
E. p = q = e = 31
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The process of verifying and identity claimed by or for a system entity. | | | A form of cryptosystem in which encryption and decryption are performed using the same key. Also known as conventional encryption. |