Quiz
#2 Information security and data protection
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Perguntas do quiz (60)
1This is the process of determining whether someone or something is, in fact, who or what it is declared to be.
- AConditional access
- BAuthentication
- CIdentification
- DAnonymizer
- EAuthorization
2In 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
- APassword
- BTwo factor authentication
- CSecurity token
- DAuthentication
3 Why would reusing a ticket as a replay attack is Kerberos not be successful?
- AThe tickets are encrypted
- BThe tickets are digitally signed
- CThe tickets are used a token
- DThe tickets are time stamped
4What is Man in the middle attack?
- AThe attackers catch our employee in the middle of them and start applying physical pressure on them
- BThe attacker (man) hides inside (in the middle of) a crowd to sneak past the guards and cameras
- CThe hacker jacks in a network and records all the information sent over the network
5What is encryption strength is based on? Please select the best answer
- AThe strength of the algorithm, the length of the key, and the secrecy of the key
- BThe length of the key, the type of algorithm, and the strength of the key
- CThe privacy of the key, the length of the algorithm, and the strength of the key
- DThe strength of the key, the length of the algorithm, and the privacy of the key
6One form of ‘something you have’ is the _____ and USB tokens
- AFingerprint
- BTokens
- CIdentification
- DPassword
- EDigital signatures
7The process based on some physical, genetic, or otherwise human characteristic that cannot be duplicated is also known as (Please select the best answer)
- APassword authentication
- BPhysical authentication
- CFingerprint authentication
- DBiometric authentication
8What is a good way to make users in a network safer in the internet
- AGet a slow connection so they cannot download too much
- BDeny all internet access
- CAll of the above
- DNone of the above
- ESet up a filtering proxy server so you can check all the incoming traffic
9When 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
- AIt is known as the Man in the middle attack
- BIt is known as the TCP/IP spoofing attack
- CIt is known as the Back door attack
- DIt is known as the Replay attack
10In which of the following attack does the attacker capture a portion of the communication between two parties, modifies it, and inserts
- AMan-in-the-middle attack
- BSpoofing
- CSniffing
- DDenial-of-service
11A password represents
- ASomething you have
- BNone of the above
- CSomething you are
- DSomething you know
- EAll of the above
12List the main aspects of information security: I. Confidentiality II. Integrity III. Availability IV. Consistency
- AI-III-IV
- BI-III
- CI-II-III
- DI only
- EII-III-IV
13Which of the following describes the challenge-response
- AA workstation or system that generates a random challenge string that the user enters when prompted along with the proper PIN (Personal Identification Number)
- BA workstation or system that generates a random ID that the user enters when prompted along with the proper PIN (Personal Identification Number)
- CA special hardware device that is used to generate random text in a cryptography system
- DThe authentication mechanism in the workstation or system does not determine if the owner should be authenticated.
14Consider 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?
- A6
- B8
- C9
- D16
15Suppose Bob wants to send a secret message to Alice using public key cryptography. Then Bob should
- AEncrypt the message with Alice’s public key and send Alice the message
- BEncrypt the message with Alice’s private key and send the encrypted message to Alice
- CEncrypt the message with his public key and send Alice the message
- DEncrypt the message with his private key and send the encrypted message to Alice
16Suppose Bob wants to send Alice a digital signature for the message m. To create the digital signature
- ABob applies a hash function to m and then encrypts the result with his private key
- BBob applies a hash function to m and then encrypts the result with his public key
- CBob applies a hash function to m and then encrypts the result with Alice’s public key
- DBob encrypts m with his private key and then applies a hash function to the result
17Suppose 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
- AApplies Bob's public key to the digital signature, applies the has function to m, and compares the results of the two operations;
- BApplies 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;
- CApplies a de-hashing function to the digital signature and compare the result to m;
- DNo correct answer;
18Suppose a CA contains Bob's certificate, which binds Bob's public key to Bob. This certificate is signed with
- AThe CA's private key
- BBob’s public key
- CThe CA's public key
- DBob’s private key
19A 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.
- ANetwork Adapter
- BAntivirus Software
- CIntrusion Detection System
- DFirewall
20Which security action should be finished before access is given to the network?
- AIdentification and authorization
- BIdentification and authentication
- CAuthentication and authorization
- DAuthentication and password
21Which of the following types of encryption would BEST to use for a large amount of data?
- AAsymmetric
- BSymmetric
- CRSA
- DHash
22Which statement correctly describes the difference between a secure cipher and a secure hash?
- AA hash produces a variable output for any input size; a cipher does not.
- BA cipher can be reversed; a hash cannot.
- CA cipher produces the same size output for any input size; a hash does not.
23This is a trial and error method used to decode encrypted data through exhaustive effort rather than employing intellectual strategies.
- ADecryption
- BCryptanalysis
- CCryptography
- DBrute force cracking
24Making sure that the data has not been changed unintentionally, due to an accident or malice, is:
- AAuditability
- BAvailability
- CIntegrity
- DConfidentiality
25Which of the following appears when an asset of the system become lost, unavailable or unusable?
- AInterception
- BInterruption
- CInterpretation
- DModification
- EFabrication
26Show incorrect kind of threats
- AInterception
- BInterruption
- CInterpretation
- DModification
- EFabrication
27Bock cipher maps each plaintext block to :
- ASame length cipher text block
- BDifferent length cipher text block
- CThe same letter
- DNo answer
28What is vulnerability?
- AA weakness in the security system
- BA Method which uses flaws to have more access, privileges or resources to the system
- CA method which used to eliminate or reduce threats
- DA kind of auth to system
29A(n) _____ application monitors all incoming and outgoing network traffic and block unauthorized packets from getting through
- AAntivirus
- BIntrusion Detection System (IDS)
- CPersonal Firewall
- DNetwork Monitor
30What is assumed by cipher in cryptography ?
- AAlgorithm for performing encryption and decryption
- BEncrypted message
- CNone of mentioned
- DRaw message
- EAll of mentioned
31What is assumed by ciphertext in cryptography?
- AAlgorithm for performing encryption and decryption
- BEncrypted message
- CNone of mentioned
- DRaw message
- EAll of mentioned
32What is assumed by plaintext in cryptography?
- AAlgorithm for performing encryption and decryption
- BEncrypted message
- CNone of mentioned
- DRaw message
- EAll of mentioned
33In cryptography, what is key?
- AInfo used to cipher, known only to sender and receiver
- BAlgorithm for transforming plaintext to ciphertext
- CEncrypted message
- DRecovering plaintext from ciphertext
- EConverting plaintext to ciphertext
34What is cryptoanalysis?
- AStudy of principles/methods deciphering ciphertext without knowing key
- BInfo used to cipher, known only to sender and receiver
- CAlgorithm for transforming plaintext to ciphertext
- DRecovering plaintext from ciphertext
- EConverting plaintext to ciphertext
35In asymmetric key cryptography, the public key for decryption is kept by:
- ASender
- BReceiver
- CSender and receiver
- DEveryone in the network
- EAll the connected devices to the network
36Which of these are threats against to modern computer?
- ANetwork attacks, firewall and worms
- BViruses, worms and encryption
- CNetwork attacks, viruses and worms
- DViruses, network encryptions and worms
37How the industry solves the threats ?
- AFirewall, IDS, Kerberos, blogs
- BIDS, firewall, authentication, policies
- CVirus, worms, attacks, web-sites
- DNetwork attacks, IDS, worms, virus
38Which one of the following algorithm is not used in asymmetric key cryptography?
- ARSA algorithm
- BDiffle-Hellman algorithm
- CDES algorithm
- DDSA algorithm
39In cryptography, the order of the order of the letters in a message in rearranged by
- ATranspositionalcip ciphers
- Bsubstitution ciphers
- CAll kinds of the ciphers
- DNone of the mentioned
40What is data encryption standard (DES)?
- ABlock cipher
- Bstream cipher
- Cbit cipher
- Dnone of the mentioned
41Cryptanalysis is used:
- ATo find some insecurity in cryptographic scheme
- Bto increase the speed
- Cto encrypt the data
- Dnone of the mentioned
42Cryptographic hash function takes an arbitrary block of data and returns
- AFixed site bit string
- Bvariable size bit string
- Cnone of the mentioned
- Dboth of the mentioned
43A substitution cipher substitutions one symbol with
- AKeys
- BOthers
- CMulti Parties
- DSingle Party
44An asymmetric-key(or public key ) cipher uses
- A1 key
- B2 key
- C3 key
- D4 key
45In the computer industry the “What you have” method is use of?
- APasswords
- BSmart cards
- CDigital certificates’
46A smartcard represents
- ANone of the above
- BSomething you are
- CAll of the above
- DSomething you have
- ESomething you know
47Convert one symbol of plaintext immediately into a symbol of cipher text (example:Caesar cipher)
- AEncryption
- BPlaintext
- CBlock cipher
- Dstream ciphers
48Interruption is
- AAsset lost, unusable, unavailable
- BUnauthorized access
- CUnauthorized change, tamper of data
- DEx. Unauthorized add data to a DB
49Modification is
- AUnauthorized change, tamper of data
- BAsset lost, unusable, unavailable
- CUnauthorized access
- DEx. Unauthorized add data to a DB
50Which are the examples of DEFENCE?
- AFirewalls, router access control list, spam filters, virus scanners
- BEmployee communication, policy on company Intranet
- CAudit logs, intrusion detection system, network traffic monitoring
- DNetwork attacks, IDS, worms, virus
51Which are the examples of DETERRENCE?
- AEmployee communication, policy on company Intranet
- BFirewalls, router access control list, spam filters, virus scanners
- CAudit logs, intrusion detection system, network traffic monitoring
- DNetwork attacks, IDS, worms, virus
52Which are the examples of DETECTION?
- AAudit logs, intrusion detection system, network traffic monitoring
- BEmployee communication, policy on company Intranet
- CFirewalls, router access control list, spam filters, virus scanners
- DNetwork attacks, IDS, worms, virus
53What is encryption?
- AIs the process of encoding a message so that its meaning is not obvious
- BIs the reverse process, transforming an encrypted message back into its normal, original form
- CIs the process of preventing any attacks from the hackers
54In password protection, this is a random string of data or number used to modify a password hash
- ANonce
- BSsl
- COne time password
- DSecret key
- EPublic key
55Using 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:
- AEncrypt the message with his private key, encrypt the result with Ailce’s public key and then send Alice the message
- B• Encrypt the message with his private key , encrypt yhe result with alices’ private key, and then send Alicce the message
- C• Encrypt the message with his public key, encrypt the result with Alice’s public key, and then send Alice the message
56Which statement correctly describes the difference between a secure cipher and a secure hash?
- ACipher can be reversed, hash cannot
- BA hash can be reversed, a cipher cannot
- CA hash production a variable output fot any input size, a cipher does not
- DA cipher produces the same size output for any input size, a hash does not
57This is a trial and error method used to decode encrypted data through exhaustive effort rather than employing intellectual strategies
- A• Brute force cracking
- B• Decryption
- C• Cryptoanalysis
- D• Cryptography
58A 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
- AFirewall
- BNetwork adapter
- CAntivirus software
- DIntrusion detection system
59Suppose a CA contains Bob’s certificate, which binds Bob’s public key to Bob. This certificate is signed with
- AThe CA’s private key
- BBobs public key
- CThe CAs public key
- DBobs private key
60Suppose 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
- AApplies Bob’s public key to the digital signature applies to the hash function to m, and compares the results of the two operations.
- BApplies 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
- CApplies a de-hashing function to the digital signature and compares the result m
- DNo correct answer
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- - at Quiz sobre #2 Information security and data protection, criado por хомяк убийца em 13-05-2018.
- Autor
- хомяк убийца
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- English
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