Question 1
Question
A collision attack is an attempt to find two input strings of a hash function that produce the same hash result.
Question 2
Question
After the DES cipher was broken and no longer considered secure, what encryption algorithm was made as its successor?
Question 3
Question
Asymmetric cryptographic algorithms are also known as private key cryptography.
Question 4
Question
Ciphertext is the scrambled and unreadable output of encryption.
Question 5
Question
Data that is in an unencrypted form is referred to as which of the following?
Answer
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plain text
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crypttext
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cleartext
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simpletext
Question 6
Question
Encryption is the practice of transforming information so that it is secure and cannot be accessed by unauthorized parties.
Question 7
Question
GNU Privacy Guard a proprietary software that runs on different operating systems.
Question 8
Question
If Bob receives an encrypted reply message from Alice, whose private key is used to decrypt the received message?
Question 9
Question
If using the MD5 hashing algorithm, what is the length to which each message is padded?
Answer
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64 bits
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128 bits
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32 bits
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512 bits
Question 10
Question
In cryptography, which of the five basic protections ensures that the information is correct and no unauthorized person or malicious software has altered that data?
Answer
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confidentiality
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encryption
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availability
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integrity
Question 11
Question
In information technology, non-repudiation is the process of proving that a user performed an action.
Question 12
Question
In which type of encryption is the same key used to encrypt and decrypt data?
Answer
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public
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asymmetric
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symmetric
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private
Question 13
Question
Obfuscation is making something well known or clear.
Question 14
Question
One of the first popular symmetric cryptography algorithms was RSA.
Question 15
Question
The SHA-1 hashing algorithm creates a digest that is how many bits in length?.
Answer
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192 bits
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160 bits
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128 bits
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96 bits
Question 16
Question
The simplest type of stream cipher, one in which one letter or character is exchanged for another, is known as what?
Answer
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loop
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lock
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substitution
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shift
Question 17
Question
The XOR cipher is based on the binary operation eXclusive OR that compares two bits.
Question 18
Question
What alternative term can be used to describe asymmetric cryptographic algorithms?
Answer
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public key cryptography
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user key cryptography
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private key cryptography
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cipher-text cryptography
Question 19
Question
What cryptographic method, first proposed in the mid-1980s, makes use of sloping curves instead of large prime numbers?
Question 20
Question
What is a block cipher algorithm that operates on 64-bit blocks and can have a key length from 32 to 448 bits?
Answer
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Blowfish
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Whirlpool
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Rijndal
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Twofish
Question 21
Question
What is the U.S. federal government standard for digital signatures?
Answer
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Data Encryption Standard
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Advanced Encryption Standard
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Digital Signature Algorithm
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Elliptic Curve Cryptography
Question 22
Question
What technology uses a chip on the motherboard of the computer to provide cryptographic services?
Question 23
Question
What term best describes when cryptography is applied to entire disks instead of individual files or groups of files?
Answer
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full disk encryption
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system encryption
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OS encryption
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disk encryption
Question 24
Question
What term describes data actions being performed by endpoint devices, such as printing a report from a desktop computer?
Answer
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data-in-transit
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data-at-rest
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data-in-use
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data-in-play
Question 25
Question
What type of cipher takes one character and replaces it with one character, working one character at a time?
Answer
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block cipher
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unit cipher
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single cipher
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stream cipher
Question 26
Question
What type of cryptographic algorithm creates a unique digital fingerprint of a set of data?
Question 27
Question
What type of cryptography uses two keys instead of just one, generating both a private and a public key?
Answer
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shared
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asymmetric
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symmetric
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open
Question 28
Question
What type of message authentication code uses hashing to authenticate the sender by using both a hash function and a secret cryptographic key?
Question 29
Question
What widely used commercial asymmetric cryptography software can be used for encrypting files and email messages?
Question 30
Question
When Bob needs to send Alice a message with a digital signature, whose private key is used to encrypt the hash?
Question 31
Question
Which hash algorithm's primary design feature is two different and independent parallel chains of computation, the results of which are then combined at the end of the process?
Question 32
Question
Which key exchange requires Alice and Bob to each agree upon a large prime number and related integer?
Question 33
Question
Which of the following are considered to be common asymmetric cryptographic algorithms? (Choose all that apply.)
Answer
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Digital Signature Algorithm
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Elliptic Curve Cryptography
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Data Encryption Standard
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Advanced Encryption Standard
Question 34
Question
Which of the following asymmetric cryptography algorithms is most commonly used?
Question 35
Question
Which of the following is a public key system that generates random public keys that are different for each session?
Answer
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public secrecy
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ephemeral-secrecy
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random-key exchange
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perfect forward secrecy
Question 36
Question
Which of the following is more secure than software encryption?
Answer
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hardware encryption
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full disk encryption
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private encryption
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application encryption
Question 37
Question
Which of the following is not one of the functions of a digital signature?
Answer
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verification of the sender
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protect the public key
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prove the integrity of the message
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prevention of the sender from disowning the message
Question 38
Question
Which standard was approved by NIST in late 2000 as a replacement for DES?
Question 39
Question
Which type of cryptographic algorithm takes an input string of any length, and returns a string of any requested variable length?
Answer
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sponge
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block
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substitution
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loop
Question 40
Question
Wireless data networks are particularly susceptible to known ciphertext attacks.