1
For Expert help and assignment solutions, +254707240657
Introduction to Cryptography Questions
and Answers (100% Correct Answers)
Already Graded A+
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?—Ans:
Transposition cipher
© 2025 Assignment Expert
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?—Ans: Stream cipher
Guru01 - Stuvia
cryptography—Ans: 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—Ans: the art of breaking or "cracking" the
protection provided through cryptography algorithms
cryptology—Ans: the study and practice of both cryptography
and cryptanalysis
plaintext: a human-readable unencrypted message used as an
input to a cipher (encryption algorithm) before encryption or after
decryption
ciphertext—Ans: unreadable encrypted message output after an
encryption algorithm has been used on the plaintext
cipher—Ans: the process (or algorithm) used to encrypt and
decrypt a message
A system administrator wants to encrypt a computer hard drive to
make sure the contents of the computer are not readable in case
the computer is lost or stolen. The encryption method must be
, 2
For Expert help and assignment solutions, +254707240657
efficient, scalable, and secure. Which encryption method meets
this requirement if the administrator wants to minimize the impact
on the computer's CPU?—Ans: Trusted platform module
A developer wants to encrypt an HTML file on his MacBook using
an AES encryption. Which command should the developer run in
the terminal to encrypt the HTML file?—Ans: aescrypt -e
filename.html
hardware security module (HSM)—Ans: a tamper-evident and
intrusion-resistant physical device that safeguards and manages
cryptographic keys and provides cryptographic processing
trusted platform module (TPM)—Ans: A dedicated processor that
© 2025 Assignment Expert
handles hardware-level encryption; allows you to encrypt data on
your device
database encryption—Ans: the process of using an algorithm to
transform data stored in a database into ciphertext to protect the
Guru01 - Stuvia
data stored in a database from being accessed by someone with
malicious intentions
Advanced Encryption Standard (AES)—Ans: a symmetric 128-, or
256-bit block cipher based on the Rijndael algorithm developed
by Belgian cryptographers Joan Daemen and Vincent Rijmen and
adopted by the U.S. government as its encryption standard to
replace DES
A business wants to use keys issued by a trusted third party to
demonstrate to potential customers that it is a legitimate
organization.Which key is used to sign the certificate issued to the
business?—Ans: Private key of the root CA
A business wants to use keys issued by a trusted third party to
demonstrate it is a legitimate organization to potential
customers.Which key should the business send to potential
customers to prove its identity?—Ans: Public key of the company
What should an administrator use to import and export all items
written using X.509 that are part of a chain of trust?—Ans: Public
Key Cryptography Standard (PKCS) #12
For Expert help and assignment solutions, +254707240657
Introduction to Cryptography Questions
and Answers (100% Correct Answers)
Already Graded A+
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?—Ans:
Transposition cipher
© 2025 Assignment Expert
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?—Ans: Stream cipher
Guru01 - Stuvia
cryptography—Ans: 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—Ans: the art of breaking or "cracking" the
protection provided through cryptography algorithms
cryptology—Ans: the study and practice of both cryptography
and cryptanalysis
plaintext: a human-readable unencrypted message used as an
input to a cipher (encryption algorithm) before encryption or after
decryption
ciphertext—Ans: unreadable encrypted message output after an
encryption algorithm has been used on the plaintext
cipher—Ans: the process (or algorithm) used to encrypt and
decrypt a message
A system administrator wants to encrypt a computer hard drive to
make sure the contents of the computer are not readable in case
the computer is lost or stolen. The encryption method must be
, 2
For Expert help and assignment solutions, +254707240657
efficient, scalable, and secure. Which encryption method meets
this requirement if the administrator wants to minimize the impact
on the computer's CPU?—Ans: Trusted platform module
A developer wants to encrypt an HTML file on his MacBook using
an AES encryption. Which command should the developer run in
the terminal to encrypt the HTML file?—Ans: aescrypt -e
filename.html
hardware security module (HSM)—Ans: a tamper-evident and
intrusion-resistant physical device that safeguards and manages
cryptographic keys and provides cryptographic processing
trusted platform module (TPM)—Ans: A dedicated processor that
© 2025 Assignment Expert
handles hardware-level encryption; allows you to encrypt data on
your device
database encryption—Ans: the process of using an algorithm to
transform data stored in a database into ciphertext to protect the
Guru01 - Stuvia
data stored in a database from being accessed by someone with
malicious intentions
Advanced Encryption Standard (AES)—Ans: a symmetric 128-, or
256-bit block cipher based on the Rijndael algorithm developed
by Belgian cryptographers Joan Daemen and Vincent Rijmen and
adopted by the U.S. government as its encryption standard to
replace DES
A business wants to use keys issued by a trusted third party to
demonstrate to potential customers that it is a legitimate
organization.Which key is used to sign the certificate issued to the
business?—Ans: Private key of the root CA
A business wants to use keys issued by a trusted third party to
demonstrate it is a legitimate organization to potential
customers.Which key should the business send to potential
customers to prove its identity?—Ans: Public key of the company
What should an administrator use to import and export all items
written using X.509 that are part of a chain of trust?—Ans: Public
Key Cryptography Standard (PKCS) #12
