CH1

Question 1

What type of attack is snooping

Answer 1

• Passive Attack

Question 2

……. attack violate integrity by allowing attackers to impersonate legitimate entities

Answer 2

Masquerading

Question 3

what is a Repudiation, What principle does it violate and what type of attack is it ?

Answer 3

• Repusiation is attcker denies having participated in that transaction or communication.
• Threat of integrity
• active attack

Question 4

Name the security services :

Answer 4

• Data confidentiality
• Data integrity
• Nonrepudiation
• Authentication
• Access control

Question 5

Which security services does encipherment refers to?

Answer 5

• Data Integrity
• Data Confidentiality
• Authentication

Question 6

Which security services does Digital Signature refers to?

Answer 6

• Nonrepudiation
• Authentication
• Data integrity

Question 7

What are the security mechanisms for Nonrepudiation?

Answer 7

• Data integrity
• Digital Signature
• notarization

Question 8

Cryptology is a field both of?

Answer 8

Cryptography and cryptanalysis

Question 9

What does cryptography solve?

Answer 9

• Confidentiality, integrity, availability, identity and non-repudiation

Question 10

what are some examples of symmetric encryption?

Answer 10

• DES (Data Encryption Standard)
• AES(Advanced Encryption Standard)

Question 11

what are two examples of Substitution Cipher?

Answer 11

• Caesar cipher
• Atbash cipher

Question 12

Messages encrypted with the private key can
only be decrypted with the public key.

Answer 12

Asymmetric Digital Signature

Question 13

which one is slower:
- Asymmetric-Key
- Symmetric-Key

Answer 13

Asymmetric-Key

Question 14

why does is the Asymmetric key slower than the symmetric key?

Answer 14

because the key is longer.