Quiz 1

___________are the three fundamental goals of information security

• Confidentiality, Integrity, and  Availability

• Classic cryptography , and

  Symmetric ciphers

  Public key , and cryptography

• Multilevel security, and Firewalls, Authorization

 In cryptography, what is cipher?

• algorithm for performing encryption and decryption

• encrypted message

• both (a) and (b)

• none of the mentioned

. In asymmetric key cryptography, the private key is kept by _____.

• sender

• receiver

• sender and receiver

• all the connected devices to the network

Cryptanalysis is used ______.

• to find some insecurity in a cryptographic scheme

• to increase the speed

• to encrypt the data

• none of the mentioned

A denial of service attack

• can erase an entire Web site.

• does not have to occur over a network.

• is an intentional attempt to overload a Web server or Web site.

• all of the above.

Authentication is

• Passwords

• Biometrics

• Other methods of authentication

• All of the above

Authorization is

• Access Control Lists/Capabilities

• Firewalls, intrusion detection (IDS)

• Multilevel security (MLS),

• All of the above

Cryptosystem is secure if

• if best know attack is to try all keys Exhaustive key search

• if any

  shortcut attack is known

• All of the above

Cryptosystem is insecure

• if any shortcut attack is known

• is to try all keys Exhaustive key search,

• All of the above

Playfair Key Matrix based on a keyword filling in the letters of the keyword

• No duplicates letters

• Duplicates letters

• All of the above