Introduction to Cryptography Exam
Questions with Answers
cryptography - Correct Answers: the science of keeping information secret and safe by transforming it
into a form that unintended recipients cannot understand using an algorithm (a series of mathematical
operations)
cryptanalysis - Correct Answers: the art of breaking or "cracking" the protection provided through
cryptography algorithms
cryptology - Correct Answers: the study and practice of both cryptography and cryptanalysis
plaintext - Correct Answers: a human-readable unencrypted message used as an input to a cipher
(encryption algorithm) before encryption or after decryption
ciphertext - Correct Answers: unreadable encrypted message output after an encryption algorithm has
been used on the plaintext
cipher - Correct Answers: the process (or algorithm) used to encrypt and decrypt a message
A developer wants to send a system administrator a message and wants to use a cipher that reorders
the plaintext characters to create the ciphertext. Which cipher meets this requirement? - Correct
Answers: Transposition cipher
A developer wants to encrypt a data stream using a symmetric key and wants to encrypt the data in
such a way that the cipher method encrypts the individual bits. Which cipher method can the developer
use to meet this requirement? - Correct Answers: Stream cipher
Questions with Answers
cryptography - Correct Answers: the science of keeping information secret and safe by transforming it
into a form that unintended recipients cannot understand using an algorithm (a series of mathematical
operations)
cryptanalysis - Correct Answers: the art of breaking or "cracking" the protection provided through
cryptography algorithms
cryptology - Correct Answers: the study and practice of both cryptography and cryptanalysis
plaintext - Correct Answers: a human-readable unencrypted message used as an input to a cipher
(encryption algorithm) before encryption or after decryption
ciphertext - Correct Answers: unreadable encrypted message output after an encryption algorithm has
been used on the plaintext
cipher - Correct Answers: the process (or algorithm) used to encrypt and decrypt a message
A developer wants to send a system administrator a message and wants to use a cipher that reorders
the plaintext characters to create the ciphertext. Which cipher meets this requirement? - Correct
Answers: Transposition cipher
A developer wants to encrypt a data stream using a symmetric key and wants to encrypt the data in
such a way that the cipher method encrypts the individual bits. Which cipher method can the developer
use to meet this requirement? - Correct Answers: Stream cipher
