Cryptography: Basic Quiz - Virus/Trojans

  

•What is the easiest method to get a password?

–Brute-force cracking

–Guessing

–Dictionary attack

–Hybrid attack

•Which of the following is a passive online attack?

–Password guessing

–Network sniffing

–Brute-force attack

–Dictionary attack

•How do you remove a Trojan from a system?

–Search the Internet for freeware removal tools.

–Purchase commercially available tools to remove the Trojan.

–Reboot the system.

–Uninstall and reinstall all applications.

•What is the difference between a backdoor and a Trojan?

–A Trojan usually provides a backdoor for a hacker.

–A backdoor must be installed first.

–A Trojan is not a way to access a system.

–A backdoor is provided only through a virus, not through a Trojan.

•What type of virus modifies itself to avoid detection?

–Stealth virus

–Polymorphic virus

–Multipartite virus

–Armored virus

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•What is a covert channel?

–Using a communications channel in a way that was not intended

–Tunneling software

–A Trojan removal tool

–Using a communications channel in the original, intended way

•Which of the following are the best indications of a virus attack? (Choose all that apply.)

–Any anomalous behavior

–Unusual program opening or closing

–Strange pop-up messages

–Normal system operations as most viruses run in the background

•What components of a system do viruses infect? (Choose all that apply.)

–Files

–System sectors

–Memory

–CPU

–DLL files

•What is cryptography?

–The study of computer science

–The study of mathematics

–The study of encryption

–The creation of encryption algorithms

•What is the process of changing the order of some characters in an encryption key?

–Transposition

–Subtraction

–Substitution

–Transrelation

•How many keys exist in a public/private key pair?

–A. 1 B. 2 C. 3 D. 4

•Which cryptographic attack attempts to crack the code by looking for patterns and using statistical analysis?

–Cipher text–only attack

–Chosen–plain text attack

–Chosen–cipher text attack

–Brute-force attack

•What is the goal of a known–plain text attack?

–To read the encrypted data

–To gain access to the public key

–To discover the encryption key

–To validate the sender of the data

•Why would hackers want to cover their tracks?

–To prevent another person from using the programs they have installed on a target sys-

–tem

–To prevent detection or discovery

–To prevent hacking attempts

–To keep other hackers from using their tools

•What is the process of hiding text within an image called?

–Steganography

–Encryption

–Spyware

–Keystroke logging

•What is privilege escalation?

–Creating a user account with higher privileges

–Creating a user account with administrator privileges

–Creating two user accounts: one with high privileges and one with lower privileges

–Increasing privileges on a user account