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It security questions.

It security questions.

Find It security university examination questions in acaproso.com

# Question
1

Discuss briefly three security goals


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2

Security mechanism is  the technique used to implement security services, mention the security mechanism which is provided in the following scenario

  • School demands student identification and password to let student log into the school server.
  • A banker requires the customer`s signature for a withdraw

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3

Using the Euclidean algorithm , find the greatest common divisor (GCD) of 300 and 42.


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4

Find the results of the following operations

  • 22 mod 7
  • ( 4223 + 17323 ) mod 12

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5

Find the two values of x of this linear equation

3x ≡ 4 (mod 5)


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6

Encrypt the word `` GUIDANCE`` using the following ciphers

  • Additive cipher with key = 20
  • Multiplicative cipher with key = 15

Define cryptanalysis and mention the attack that adversary can use to decrypt that above ciphertext.


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7

Halima wants to encipher plaintext made of both letters a-z and digits 0-9 . If she uses an additive cipher,

  • what is the key domain ?
  • What is modulus ?

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8

Determine and give reasons whether the P-box with the following permutation table is a straight P-box , a compression P-box or an expansion P-box

1 1 2 3 2 4


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9

Determine and give reasons whether the P-box with the following permutation table is a straight P-box , a compression P-box or an expansion P-box

1 3 5 6 7

 


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10

Determine and give reasons whether the P-box with the following permutation table is a straight P-box , a compression P-box or an expansion P-box

1 2 3 4 5 6

 


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