Network Security Questions

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1.

________ is the science and art of transforming messages to make them secure and immune to attacks.

A

Cryptography

B

Cryptoanalysis

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: A

None.

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2.

The ________is the original message before transformation

A

ciphertext

B

plaintext

C

secret-text

D

none of the above

Correct Answer: B

None.

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3.

The ________ is the message after transformation

A

ciphertext

B

plaintext

C

secret-text

D

none of the above

Correct Answer: A

None.

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4.

A(n) _______ algorithm transforms plaintext to ciphertext

A

encryption

B

decryption

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: A

None.

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5.

A(n) ______ algorithm transforms ciphertext to plaintext

A

encryption

B

decryption

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: B

None.

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6.

A combination of an encryption algorithm and a decryption algorithm is called a ________.

A

cipher

B

secret

C

key

D

none of the above

Correct Answer: A

None.

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7.

The _______ is a number or a set of numbers on which the cipher operates

A

cipher

B

secret

C

key

D

none of the above

Correct Answer: C

None.

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8.

In a(n) ________ cipher, the same key is used by both the sender and receiver.

A

symmetric-key

B

asymmetric-key

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: A

None.

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9.

In a(n) ________, the key is called the secret key.

A

symmetric-key

B

asymmetric-key

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: A

None.

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10.

. In a(n) ________ cipher, a pair of keys is used.

A

symmetric-key

B

asymmetric-key

C

either (a) or (b)

D

neither (a) nor (b)

Correct Answer: B

None.

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