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#2 Information security and data protection

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- at Quiz sobre #2 Information security and data protection, criado por хомяк убийца em 13-05-2018.
хомяк убийца
Quiz por хомяк убийца, atualizado more than 1 year ago
хомяк убийца
Criado por хомяк убийца quase 6 anos atrás
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Resumo de Recurso

Questão 1

Questão
This is the process of determining whether someone or something is, in fact, who or what it is declared to be.
Responda
  • Conditional access
  • Authentication
  • Identification
  • Anonymizer
  • Authorization

Questão 2

Questão
In the original description, the Diffie-Hellman exchange by itself does not provide ____ of the communicating parties and is thus vulnerable to a man-in-the-middle attack
Responda
  • Password
  • Two factor authentication
  • Security token
  • Authentication

Questão 3

Questão
Why would reusing a ticket as a replay attack is Kerberos not be successful?
Responda
  • The tickets are encrypted
  • The tickets are digitally signed
  • The tickets are used a token
  • The tickets are time stamped

Questão 4

Questão
What is Man in the middle attack?
Responda
  • The attackers catch our employee in the middle of them and start applying physical pressure on them
  • The attacker (man) hides inside (in the middle of) a crowd to sneak past the guards and cameras
  • The hacker jacks in a network and records all the information sent over the network

Questão 5

Questão
What is encryption strength is based on? Please select the best answer
Responda
  • The strength of the algorithm, the length of the key, and the secrecy of the key
  • The length of the key, the type of algorithm, and the strength of the key
  • The privacy of the key, the length of the algorithm, and the strength of the key
  • The strength of the key, the length of the algorithm, and the privacy of the key

Questão 6

Questão
One form of ‘something you have’ is the _____ and USB tokens
Responda
  • Fingerprint
  • Tokens
  • Identification
  • Password
  • Digital signatures

Questão 7

Questão
The process based on some physical, genetic, or otherwise human characteristic that cannot be duplicated is also known as (Please select the best answer)
Responda
  • Password authentication
  • Physical authentication
  • Fingerprint authentication
  • Biometric authentication

Questão 8

Questão
What is a good way to make users in a network safer in the internet
Responda
  • Get a slow connection so they cannot download too much
  • Deny all internet access
  • All of the above
  • None of the above
  • Set up a filtering proxy server so you can check all the incoming traffic

Questão 9

Questão
When an attacker captures part of a communication and later sends the communication segment to the server whilst pretending to be the user it is known as a
Responda
  • It is known as the Man in the middle attack
  • It is known as the TCP/IP spoofing attack
  • It is known as the Back door attack
  • It is known as the Replay attack

Questão 10

Questão
In which of the following attack does the attacker capture a portion of the communication between two parties, modifies it, and inserts
Responda
  • Man-in-the-middle attack
  • Spoofing
  • Sniffing
  • Denial-of-service

Questão 11

Questão
A password represents
Responda
  • Something you have
  • None of the above
  • Something you are
  • Something you know
  • All of the above

Questão 12

Questão
List the main aspects of information security: I. Confidentiality II. Integrity III. Availability IV. Consistency
Responda
  • I-III-IV
  • I-III
  • I-II-III
  • I only
  • II-III-IV

Questão 13

Questão
Which of the following describes the challenge-response
Responda
  • A workstation or system that generates a random challenge string that the user enters when prompted along with the proper PIN (Personal Identification Number)
  • A workstation or system that generates a random ID that the user enters when prompted along with the proper PIN (Personal Identification Number)
  • A special hardware device that is used to generate random text in a cryptography system
  • The authentication mechanism in the workstation or system does not determine if the owner should be authenticated.

Questão 14

Questão
Consider the Diffie-Hellman scheme with a common prime p=7 and primitive root (generator) g=3 if the user A has private key XA = 3, what is A’s public key RA?
Responda
  • 6
  • 8
  • 9
  • 16

Questão 15

Questão
Suppose Bob wants to send a secret message to Alice using public key cryptography. Then Bob should
Responda
  • Encrypt the message with Alice’s public key and send Alice the message
  • Encrypt the message with Alice’s private key and send the encrypted message to Alice
  • Encrypt the message with his public key and send Alice the message
  • Encrypt the message with his private key and send the encrypted message to Alice

Questão 16

Questão
Suppose Bob wants to send Alice a digital signature for the message m. To create the digital signature
Responda
  • Bob applies a hash function to m and then encrypts the result with his private key
  • Bob applies a hash function to m and then encrypts the result with his public key
  • Bob applies a hash function to m and then encrypts the result with Alice’s public key
  • Bob encrypts m with his private key and then applies a hash function to the result

Questão 17

Questão
Suppose Alice receives from Bob a message m along with a digital signature for the message m. To verify that the message was not changed and that Bob indeed sent the message, Alice
Responda
  • Applies Bob's public key to the digital signature, applies the has function to m, and compares the results of the two operations;
  • Applies Bob's public key to the digital signature, then a de-hashing function to the result. She then compares the results of this last operation with the message m;
  • Applies a de-hashing function to the digital signature and compare the result to m;
  • No correct answer;

Questão 18

Questão
Suppose a CA contains Bob's certificate, which binds Bob's public key to Bob. This certificate is signed with
Responda
  • The CA's private key
  • Bob’s public key
  • The CA's public key
  • Bob’s private key

Questão 19

Questão
A well designed and configured ____ is like having a single point of entry into your building with a security guard at the door allowing only authorized personnel into the building.
Responda
  • Network Adapter
  • Antivirus Software
  • Intrusion Detection System
  • Firewall

Questão 20

Questão
Which security action should be finished before access is given to the network?
Responda
  • Identification and authorization
  • Identification and authentication
  • Authentication and authorization
  • Authentication and password

Questão 21

Questão
Which of the following types of encryption would BEST to use for a large amount of data?
Responda
  • Asymmetric
  • Symmetric
  • RSA
  • Hash

Questão 22

Questão
Which statement correctly describes the difference between a secure cipher and a secure hash?
Responda
  • A hash produces a variable output for any input size; a cipher does not.
  • A cipher can be reversed; a hash cannot.
  • A cipher produces the same size output for any input size; a hash does not.

Questão 23

Questão
This is a trial and error method used to decode encrypted data through exhaustive effort rather than employing intellectual strategies.
Responda
  • Decryption
  • Cryptanalysis
  • Cryptography
  • Brute force cracking

Questão 24

Questão
Making sure that the data has not been changed unintentionally, due to an accident or malice, is:
Responda
  • Auditability
  • Availability
  • Integrity
  • Confidentiality

Questão 25

Questão
Which of the following appears when an asset of the system become lost, unavailable or unusable?
Responda
  • Interception
  • Interruption
  • Interpretation
  • Modification
  • Fabrication

Questão 26

Questão
Show incorrect kind of threats
Responda
  • Interception
  • Interruption
  • Interpretation
  • Modification
  • Fabrication

Questão 27

Questão
Bock cipher maps each plaintext block to :
Responda
  • Same length cipher text block
  • Different length cipher text block
  • The same letter
  • No answer

Questão 28

Questão
What is vulnerability?
Responda
  • A weakness in the security system
  • A Method which uses flaws to have more access, privileges or resources to the system
  • A method which used to eliminate or reduce threats
  • A kind of auth to system

Questão 29

Questão
A(n) _____ application monitors all incoming and outgoing network traffic and block unauthorized packets from getting through
Responda
  • Antivirus
  • Intrusion Detection System (IDS)
  • Personal Firewall
  • Network Monitor

Questão 30

Questão
What is assumed by cipher in cryptography ?
Responda
  • Algorithm for performing encryption and decryption
  • Encrypted message
  • None of mentioned
  • Raw message
  • All of mentioned

Questão 31

Questão
What is assumed by ciphertext in cryptography?
Responda
  • Algorithm for performing encryption and decryption
  • Encrypted message
  • None of mentioned
  • Raw message
  • All of mentioned

Questão 32

Questão
What is assumed by plaintext in cryptography?
Responda
  • Algorithm for performing encryption and decryption
  • Encrypted message
  • None of mentioned
  • Raw message
  • All of mentioned

Questão 33

Questão
In cryptography, what is key?
Responda
  • Info used to cipher, known only to sender and receiver
  • Algorithm for transforming plaintext to ciphertext
  • Encrypted message
  • Recovering plaintext from ciphertext
  • Converting plaintext to ciphertext

Questão 34

Questão
What is cryptoanalysis?
Responda
  • Study of principles/methods deciphering ciphertext without knowing key
  • Info used to cipher, known only to sender and receiver
  • Algorithm for transforming plaintext to ciphertext
  • Recovering plaintext from ciphertext
  • Converting plaintext to ciphertext

Questão 35

Questão
In asymmetric key cryptography, the public key for decryption is kept by:
Responda
  • Sender
  • Receiver
  • Sender and receiver
  • Everyone in the network
  • All the connected devices to the network

Questão 36

Questão
Which of these are threats against to modern computer?
Responda
  • Network attacks, firewall and worms
  • Viruses, worms and encryption
  • Network attacks, viruses and worms
  • Viruses, network encryptions and worms

Questão 37

Questão
How the industry solves the threats ?
Responda
  • Firewall, IDS, Kerberos, blogs
  • IDS, firewall, authentication, policies
  • Virus, worms, attacks, web-sites
  • Network attacks, IDS, worms, virus

Questão 38

Questão
Which one of the following algorithm is not used in asymmetric key cryptography?
Responda
  • RSA algorithm
  • Diffle-Hellman algorithm
  • DES algorithm
  • DSA algorithm

Questão 39

Questão
In cryptography, the order of the order of the letters in a message in rearranged by
Responda
  • Transpositionalcip ciphers
  • substitution ciphers
  • All kinds of the ciphers
  • None of the mentioned

Questão 40

Questão
What is data encryption standard (DES)?
Responda
  • Block cipher
  • stream cipher
  • bit cipher
  • none of the mentioned

Questão 41

Questão
Cryptanalysis is used:
Responda
  • To find some insecurity in cryptographic scheme
  • to increase the speed
  • to encrypt the data
  • none of the mentioned

Questão 42

Questão
Cryptographic hash function takes an arbitrary block of data and returns
Responda
  • Fixed site bit string
  • variable size bit string
  • none of the mentioned
  • both of the mentioned

Questão 43

Questão
A substitution cipher substitutions one symbol with
Responda
  • Keys
  • Others
  • Multi Parties
  • Single Party

Questão 44

Questão
An asymmetric-key(or public key ) cipher uses
Responda
  • 1 key
  • 2 key
  • 3 key
  • 4 key

Questão 45

Questão
In the computer industry the “What you have” method is use of?
Responda
  • Passwords
  • Smart cards
  • Digital certificates’

Questão 46

Questão
A smartcard represents
Responda
  • None of the above
  • Something you are
  • All of the above
  • Something you have
  • Something you know

Questão 47

Questão
Convert one symbol of plaintext immediately into a symbol of cipher text (example:Caesar cipher)
Responda
  • Encryption
  • Plaintext
  • Block cipher
  • stream ciphers

Questão 48

Questão
Interruption is
Responda
  • Asset lost, unusable, unavailable
  • Unauthorized access
  • Unauthorized change, tamper of data
  • Ex. Unauthorized add data to a DB

Questão 49

Questão
Modification is
Responda
  • Unauthorized change, tamper of data
  • Asset lost, unusable, unavailable
  • Unauthorized access
  • Ex. Unauthorized add data to a DB

Questão 50

Questão
Which are the examples of DEFENCE?
Responda
  • Firewalls, router access control list, spam filters, virus scanners
  • Employee communication, policy on company Intranet
  • Audit logs, intrusion detection system, network traffic monitoring
  • Network attacks, IDS, worms, virus

Questão 51

Questão
Which are the examples of DETERRENCE?
Responda
  • Employee communication, policy on company Intranet
  • Firewalls, router access control list, spam filters, virus scanners
  • Audit logs, intrusion detection system, network traffic monitoring
  • Network attacks, IDS, worms, virus

Questão 52

Questão
Which are the examples of DETECTION?
Responda
  • Audit logs, intrusion detection system, network traffic monitoring
  • Employee communication, policy on company Intranet
  • Firewalls, router access control list, spam filters, virus scanners
  • Network attacks, IDS, worms, virus

Questão 53

Questão
What is encryption?
Responda
  • Is the process of encoding a message so that its meaning is not obvious
  • Is the reverse process, transforming an encrypted message back into its normal, original form
  • Is the process of preventing any attacks from the hackers

Questão 54

Questão
In password protection, this is a random string of data or number used to modify a password hash
Responda
  • Nonce
  • Ssl
  • One time password
  • Secret key
  • Public key

Questão 55

Questão
Using public key cryptography suppose Bob wants to send a secret message to Alice and Alice wants to be sure that the message was indeed sent by Bob. Then Bob should:
Responda
  • Encrypt the message with his private key, encrypt the result with Ailce’s public key and then send Alice the message
  • • Encrypt the message with his private key , encrypt yhe result with alices’ private key, and then send Alicce the message
  • • Encrypt the message with his public key, encrypt the result with Alice’s public key, and then send Alice the message

Questão 56

Questão
Which statement correctly describes the difference between a secure cipher and a secure hash?
Responda
  • Cipher can be reversed, hash cannot
  • A hash can be reversed, a cipher cannot
  • A hash production a variable output fot any input size, a cipher does not
  • A cipher produces the same size output for any input size, a hash does not

Questão 57

Questão
This is a trial and error method used to decode encrypted data through exhaustive effort rather than employing intellectual strategies
Responda
  • • Brute force cracking
  • • Decryption
  • • Cryptoanalysis
  • • Cryptography

Questão 58

Questão
A well designed and configured _____ is like having single point of entry into your building with a security guard at the door allowing only authorized personnel into the building
Responda
  • Firewall
  • Network adapter
  • Antivirus software
  • Intrusion detection system

Questão 59

Questão
Suppose a CA contains Bob’s certificate, which binds Bob’s public key to Bob. This certificate is signed with
Responda
  • The CA’s private key
  • Bobs public key
  • The CAs public key
  • Bobs private key

Questão 60

Questão
Suppose Alice receives from Bob a message m with digital signature for one message m. To verify that the message was not changed and that Bob indeed sent the message, Alice
Responda
  • Applies Bob’s public key to the digital signature applies to the hash function to m, and compares the results of the two operations.
  • Applies bobs public key to the digital signature, then a de-hashing function to the result. She then compares the result of this operation with the message m
  • Applies a de-hashing function to the digital signature and compares the result m
  • No correct answer

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