Question 1

2)Encryption always ensures data integrity.

Accepted Answer

False

Question 2

17)DSA was standardized as a federal information processing standard (____) called the digital signature standard (DSS).&#10;A) FIPS-086&#10;B) FIPS-112&#10;C) FIPS-156&#10;D) FIPS-186

Accepted Answer

D

Question 3

12)Symmetric key encryptions ensure confidentiality and data ____.&#10;A) integrity&#10;B) privacy&#10;C) availability&#10;D) repudiation

Accepted Answer

B

Question 4

4)DES is considered weak by today's standards due to the fact that the key size is only 56 bits.

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Question 5

10)A(n) ____ uses a keystream composed of completely random digits.&#10;A) XOR pad&#10;B) block cipher&#10;C) keystream cipher&#10;D) one-time pad

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Question 6

18)____ is the process of performing a comprehensive search on the possible solution space by throwing all computational power an attacker can gather at breaking the system.&#10;A) Brute force&#10;B) Dictionary attack&#10;C) Meet-in-the-middle&#10;D) Man-in-the-middle

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Question 7

20)A digital certificate is standardized as ____ under IETF RFC 2459.&#10;A) X.501&#10;B) X.509&#10;C) X.512&#10;D) X.529

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Question 8

6)A(n) ____ is the unique string of numbers that identifies a computer or server on the Internet.&#10;A) IP address&#10;B) ARP address&#10;C) MAC address&#10;D) DN

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Question 9

13)Schemes that involve hashing with secret keys are called ____ or keyed hashes.&#10;A) MACs&#10;B) checksums&#10;C) parity bits&#10;D) parity keys

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Question 10

1)A software system is only as secure as its weakest link.

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Question 11

8)____ occurs when an attacker maliciously changes data in transit or in a medium.&#10;A) Spoofing&#10;B) Tampering&#10;C) Replay attack&#10;D) Snooping

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Question 12

19)A ____ is a piece of structured data that uses a digital signature to bind a public key with an identity.&#10;A) private key certificate&#10;B) private key signature&#10;C) public key signature&#10;D) public key certificate

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Question 13

7)In ____, the source IP address in a packet is faked to make recipients suppose that packets are coming from trustworthy IP addresses.&#10;A) tampering&#10;B) snooping&#10;C) sniffing&#10;D) spoofing

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Question 14

5)A common use for cryptographic hash functions is to provide password-storage solutions.

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Question 15

16)____ ensure(s) the integrity of a message sent between two parties who are unknown to each other.&#10;A) 3DES-EDE&#10;B) Digital signatures&#10;C) Symmetric encryption&#10;D) Block ciphers

Accepted Answer

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Question 16

14)____ is defined as the exchange of information over an unsecured medium that allows each of two parties, the sender and the recipient, to compute a value that will be used to construct a secret key for a symmetric cipher during the rest of the communication.

A) Message authentication code
B) Digital certificate
C) Key agreement
D) Keyed hashes

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Question 17

3)Parallel encryption is possible with a block cipher operating in CFB mode.

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Question 18

11)____ was designed by IBM in the 1970s and is the most widely used symmetric cipher.&#10;A) RC4&#10;B) RC5&#10;C) DES&#10;D) AES

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Question 19

9)The two primary types of symmetric ciphers are stream ciphers and ____ ciphers.&#10;A) bit&#10;B) character&#10;C) block&#10;D) byte

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Question 20

15)The security of the RSA algorithm depends on two mathematic problems: the problem of factoring very large numbers, p and q , and the ____ problem.&#10;A) RSA&#10;B) ElGamal&#10;C) Diffie-Hellman&#10;D) discrete logarithm

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Question 21

23)____ was originally designed as part of the International Telecommunication Union's Open Standards Interconnect (OSI) effort as a general description language for the OSI protocol.&#10;A) PKCS&#10;B) OID&#10;C) ASN.1&#10;D) ASCII

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Question 22

27)____________________ means the assurance of data privacy-ensuring that no one can read the data except for the specific entity or entities intended.

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Question 23

25)____s are used for naming almost every object type in X.509 certificates such as components of distinguished names, extensions, and so on.&#10;A) OID&#10;B) ASN.1&#10;C) PKCS&#10;D) Base64

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Question 24

24)____ encoding literally means a positional numbering system using a base of 64.&#10;A) ASN.1&#10;B) Base64&#10;C) OID&#10;D) PKCS#64

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Question 25

40)What are the prerequisites for a hash function to be classified as a secure cryptographic hash function?

Accepted Answer

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Question 26

21)____ means people who know each other can securely send messages to their friends.&#10;A) Certificate Authority&#10;B) PKI&#10;C) Web of trust&#10;D) Digital ring

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Question 27

30)A(n) ____________________ attack is a form of cryptanalysis that presumes that the attacker is able to choose arbitrary plaintexts to be encrypted, in effect obtaining the corresponding ciphertexts.

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Question 28

37)Describe a block cipher counter (CTR) mode of operation.

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Question 29

41)What information does a certificate contain?

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Question 30

34)What are the main advantages and disadvantages of Electronic Codebook (ECB)?

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Question 31

29)____________________ is the assurance of nonalteration, meaning that the data either in transit or in storage has not been tampered.

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Question 32

39)What are the main characteristics of AES?

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Question 33

22)____ is a set of computer networking standards developed by the International Standard Organization (ISO) and covering electronic directory services.&#10;A) ASCII&#10;B) ASN.1&#10;C) PKCS&#10;D) X.500

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Question 34

36)Describe the CBC rollover problem.

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Question 35

28)____________________ is the assurance that an entity is who it claims to be.

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Question 36

31)For communication among former unknown parties, ____________________ refers to any method for distributing a secret amongst a group of participants in cryptography.

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Question 37

35)What are the differences between dictionary and brute-force attacks?

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Question 38

26)The company RSA Data Security initially published ____ to promote and facilitate the use of public key techniques.&#10;A) ASN.1&#10;B) Base64&#10;C) PKCS&#10;D) OID

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Question 39

33)Describe the main characteristics of symmetric key encryption.

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Question 40

38)Describe the meet-in-the-middle attack.

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Question 41

Match between columns&#10;                        Premises: when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;when an attacker intercepts and records messages for sending at a later time, though the receiver thinks that the bogus traffic is legitimate&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;identifies a specific entity as the source or origin of a given piece of data&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;takes the original data, divides it into digits, and encrypts each digit one at a time&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;traditional technique for detecting if data inadvertently changes during transmission&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;divides data into blocks of a fixed length, often 64 or 128 bits, for cryptographic operations&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;when an attacker monitors network traffic and records sensitive data such as user ID, passwords, accounts, or credit card numbers&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;provides identification of the specific entity involved in isolation from any other activity that the entity might want to perform&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;the U.S. federal government standard for digital signatures, proposed by NIST in August 1991&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions&#10;a fixed-size checksum created by cryptographic hash functions

Accepted Answer

The Answer of Digital signature algorithm (DSA) and Replay attack is...

Question 42

What is the format of a X.500 distinguished name?

Accepted Answer

The answer of What is the format of a X.500...

Deck 1: Introduction to Security Concepts