Cryptography Quizlet by Brian
Questions & Expertly Verified
This WGU Course C839: Intro to Cryptography Study set created by Brian
MacFarlane on Quizlet contains 293 questions and answers. It is widely recognized by
Western Governors University (WGU) cybersecurity students as a highly effective tool for
passing this Objective Assessment (OA) and preparing for the EC-Council Certified
Encryption Specialist (ECES) exam.
Key Exam Concepts Covered
This 293-question bank spans the entire depth of the course curriculum, prioritizing high-
yield testing areas:
• Asymmetric Encryption: Focuses on algorithms like RSA, Diffie-Hellman, and
Elliptic Curve Cryptography (ECC).
• Symmetric Encryption: Distinguishes between Block ciphers (DES, 3DES, AES)
and Stream ciphers (RC4), alongside key sizes and block configurations.
• Hashing and Integrity: Mechanics of MD5, SHA-1, SHA-2, and SHA-3,
alongside how hashes create digital signatures.
• Public Key Infrastructure (PKI): Management of X.509 certificates, Certificate
Authorities (CA), and Registration Authorities (RA).
• Historical Ciphers: Traditional substitution and transposition ciphers, such as the
Caesar, Vigenère, Atbash, and Playfair ciphers.
1
, Quiz_________________?
____ was designed to provide built in cryptography for the clipper chip.
A Blowfish
B Skipjack
C GOST
D 3DES -
ANSWER✅
B
Quiz_________________?
_____ uses at least two different shifts, changing the shift with different letters in the plain
text.
A Atbash
B multi-alphabet encryption
C Scytale
D Caesar cipher -
ANSWER✅
B
Quiz_________________?
_____ was developed by Netscape and has since been supplanted by TLS. It was the
preferred method used with secure websites (i.e. https). -
ANSWER✅
SSL
2
, Quiz_________________?
_________ allows you to enter in any text, choose the historic algorithm you wish to use,
then encrypt that text in a matter of seconds. -
ANSWER✅
CrypTool
Quiz_________________?
_________ is designated as FIPS 197 and can have three different key sizes. They are: 128,
192, or 256 bits. This algorithm was developed by two Belgian cryptographers, Joan Daemen
and Vincent Rijmen. Unlike both DES and 3DES, it is not based on a Feistel network. This
algorithm uses a substitution-permutation matrix rather than a Feistel network. It also
operates on a four-by-four column-major order matrix of bytes, called the state. -
ANSWER✅
AES
Quiz_________________?
_________ uses a block size of 128 bits and key sizes up to 256 bits. It is a Feistel cipher. It
was designed by Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, and
Niels Ferguson. -
ANSWER✅
Twofish
Quiz_________________?
__________ is a symmetric block cipher that was designed in 1993 by Bruce Schneier. This
cryptography algorithm is intended as a replacement for DES. Like DES, it is a 16-round
Feistel cipher working on 64-bit blocks. However, unlike DES, it can have varying key sizes
ranging from 32 bits to 448 bits. There are really two parts to this algorithm. The first part
handles the expansion of the key. The second part actually encrypts the data. The key
expansion is handled in several steps. The first step is to break the original key into a set of
3
, subkeys. Specifically, a key of no more than 448 bits is separated into 4,168 bytes. There is a
P-array and four 32-bit S-boxes. The P-array contains 18 32-bit subkeys, while each S-box
contains 256 entries. -
ANSWER✅
Blowfish
Quiz_________________?
__________ is an international standard for the format and information contained in a
digital certificate and is the most common type of digital certificate in the world. It was first
issued on July 3, 1988. It is a digital document that contains a public key signed by the
trusted third party, which is known as a Certificate Authority, or CA. Relied on by S/MIME,
it contains your name, info about you, and signature of the person who issued the
certificate. -
ANSWER✅
X.509
Quiz_________________?
___________ was invented by a team of cryptographers including Vincent Rijmen, Joan
Daemen, Bart Preneel, Antoon Bosselaers, and Erik De Win. It uses a 64-bit block with a
128-bit key and operates in six rounds. -
ANSWER✅
SHARK
Quiz_________________?
____________ uses the stream cipher RC4 (128 bit or 256 bit). For a 24-bit IV, there is a
50% probability the same IV will repeat after 5000 packets -
ANSWER✅
WEP (Wired Equivalent Privacy)
4
Questions & Expertly Verified
This WGU Course C839: Intro to Cryptography Study set created by Brian
MacFarlane on Quizlet contains 293 questions and answers. It is widely recognized by
Western Governors University (WGU) cybersecurity students as a highly effective tool for
passing this Objective Assessment (OA) and preparing for the EC-Council Certified
Encryption Specialist (ECES) exam.
Key Exam Concepts Covered
This 293-question bank spans the entire depth of the course curriculum, prioritizing high-
yield testing areas:
• Asymmetric Encryption: Focuses on algorithms like RSA, Diffie-Hellman, and
Elliptic Curve Cryptography (ECC).
• Symmetric Encryption: Distinguishes between Block ciphers (DES, 3DES, AES)
and Stream ciphers (RC4), alongside key sizes and block configurations.
• Hashing and Integrity: Mechanics of MD5, SHA-1, SHA-2, and SHA-3,
alongside how hashes create digital signatures.
• Public Key Infrastructure (PKI): Management of X.509 certificates, Certificate
Authorities (CA), and Registration Authorities (RA).
• Historical Ciphers: Traditional substitution and transposition ciphers, such as the
Caesar, Vigenère, Atbash, and Playfair ciphers.
1
, Quiz_________________?
____ was designed to provide built in cryptography for the clipper chip.
A Blowfish
B Skipjack
C GOST
D 3DES -
ANSWER✅
B
Quiz_________________?
_____ uses at least two different shifts, changing the shift with different letters in the plain
text.
A Atbash
B multi-alphabet encryption
C Scytale
D Caesar cipher -
ANSWER✅
B
Quiz_________________?
_____ was developed by Netscape and has since been supplanted by TLS. It was the
preferred method used with secure websites (i.e. https). -
ANSWER✅
SSL
2
, Quiz_________________?
_________ allows you to enter in any text, choose the historic algorithm you wish to use,
then encrypt that text in a matter of seconds. -
ANSWER✅
CrypTool
Quiz_________________?
_________ is designated as FIPS 197 and can have three different key sizes. They are: 128,
192, or 256 bits. This algorithm was developed by two Belgian cryptographers, Joan Daemen
and Vincent Rijmen. Unlike both DES and 3DES, it is not based on a Feistel network. This
algorithm uses a substitution-permutation matrix rather than a Feistel network. It also
operates on a four-by-four column-major order matrix of bytes, called the state. -
ANSWER✅
AES
Quiz_________________?
_________ uses a block size of 128 bits and key sizes up to 256 bits. It is a Feistel cipher. It
was designed by Bruce Schneier, John Kelsey, Doug Whiting, David Wagner, Chris Hall, and
Niels Ferguson. -
ANSWER✅
Twofish
Quiz_________________?
__________ is a symmetric block cipher that was designed in 1993 by Bruce Schneier. This
cryptography algorithm is intended as a replacement for DES. Like DES, it is a 16-round
Feistel cipher working on 64-bit blocks. However, unlike DES, it can have varying key sizes
ranging from 32 bits to 448 bits. There are really two parts to this algorithm. The first part
handles the expansion of the key. The second part actually encrypts the data. The key
expansion is handled in several steps. The first step is to break the original key into a set of
3
, subkeys. Specifically, a key of no more than 448 bits is separated into 4,168 bytes. There is a
P-array and four 32-bit S-boxes. The P-array contains 18 32-bit subkeys, while each S-box
contains 256 entries. -
ANSWER✅
Blowfish
Quiz_________________?
__________ is an international standard for the format and information contained in a
digital certificate and is the most common type of digital certificate in the world. It was first
issued on July 3, 1988. It is a digital document that contains a public key signed by the
trusted third party, which is known as a Certificate Authority, or CA. Relied on by S/MIME,
it contains your name, info about you, and signature of the person who issued the
certificate. -
ANSWER✅
X.509
Quiz_________________?
___________ was invented by a team of cryptographers including Vincent Rijmen, Joan
Daemen, Bart Preneel, Antoon Bosselaers, and Erik De Win. It uses a 64-bit block with a
128-bit key and operates in six rounds. -
ANSWER✅
SHARK
Quiz_________________?
____________ uses the stream cipher RC4 (128 bit or 256 bit). For a 24-bit IV, there is a
50% probability the same IV will repeat after 5000 packets -
ANSWER✅
WEP (Wired Equivalent Privacy)
4
