Fundamentals of Cryptography in
Information Security UPDATED ACTUAL
Exam Questions and CORRECT Answers
What is cryptography? - CORRECT ANSWER The practice of transforming information so
that its meaning cannot be understood by unauthorized parties.
What is the purpose of steganography? - CORRECT ANSWER To hide the existence of data.
How can hidden messages be embedded in files? - CORRECT ANSWER By dividing data
and hiding it in unused portions of the file.
What is a common scheme used in steganography? - CORRECT ANSWER Hiding data in the
file header fields or between sections of the metadata.
What are the two main methods of cryptography mentioned? - CORRECT
ANSWER Transposition (rearranging letters) and substitution (replacing one letter with
another).
What is encryption? - CORRECT ANSWER The process of changing the original text into a
scrambled message.
What is decryption? - CORRECT ANSWER The reverse process of encryption, turning
ciphertext back into plaintext.
What is plaintext? - CORRECT ANSWER Unencrypted data that is input for encryption or
the output of decryption.
What is ciphertext? - CORRECT ANSWER The scrambled and unreadable output of
encryption.
, What are the module objectives for the cryptography module? - CORRECT ANSWER Define
cryptography, describe hash, symmetric, and asymmetric algorithms, list uses of cryptography,
and explain limitations and attacks.
What is a visual example of steganography? - CORRECT ANSWER Changing the last bits of
color squares in an image without visible impact, forming a hidden word.
What is the significance of metadata in steganography? - CORRECT ANSWER It can be used
to hide data between sections that describe the content or structure of the actual data.
What is the outcome of applying transposition in cryptography? - CORRECT ANSWER Each
letter of the message is rearranged.
What does the term 'scrambling' refer to in cryptography? - CORRECT
ANSWER Transforming information so that it cannot be understood by unauthorized parties.
What is the role of a cryptographic algorithm? - CORRECT ANSWER To provide the
methods for encryption and decryption processes.
What is the difference between symmetric and asymmetric cryptographic algorithms? -
CORRECT ANSWER Symmetric uses the same key for encryption and decryption, while
asymmetric uses a pair of keys (public and private).
What types of files can steganography be applied to? - CORRECT ANSWER Image, audio,
or video files.
What is the main goal of cryptographic limitations and attacks? - CORRECT ANSWER To
understand the vulnerabilities and potential breaches in cryptographic systems.
Information Security UPDATED ACTUAL
Exam Questions and CORRECT Answers
What is cryptography? - CORRECT ANSWER The practice of transforming information so
that its meaning cannot be understood by unauthorized parties.
What is the purpose of steganography? - CORRECT ANSWER To hide the existence of data.
How can hidden messages be embedded in files? - CORRECT ANSWER By dividing data
and hiding it in unused portions of the file.
What is a common scheme used in steganography? - CORRECT ANSWER Hiding data in the
file header fields or between sections of the metadata.
What are the two main methods of cryptography mentioned? - CORRECT
ANSWER Transposition (rearranging letters) and substitution (replacing one letter with
another).
What is encryption? - CORRECT ANSWER The process of changing the original text into a
scrambled message.
What is decryption? - CORRECT ANSWER The reverse process of encryption, turning
ciphertext back into plaintext.
What is plaintext? - CORRECT ANSWER Unencrypted data that is input for encryption or
the output of decryption.
What is ciphertext? - CORRECT ANSWER The scrambled and unreadable output of
encryption.
, What are the module objectives for the cryptography module? - CORRECT ANSWER Define
cryptography, describe hash, symmetric, and asymmetric algorithms, list uses of cryptography,
and explain limitations and attacks.
What is a visual example of steganography? - CORRECT ANSWER Changing the last bits of
color squares in an image without visible impact, forming a hidden word.
What is the significance of metadata in steganography? - CORRECT ANSWER It can be used
to hide data between sections that describe the content or structure of the actual data.
What is the outcome of applying transposition in cryptography? - CORRECT ANSWER Each
letter of the message is rearranged.
What does the term 'scrambling' refer to in cryptography? - CORRECT
ANSWER Transforming information so that it cannot be understood by unauthorized parties.
What is the role of a cryptographic algorithm? - CORRECT ANSWER To provide the
methods for encryption and decryption processes.
What is the difference between symmetric and asymmetric cryptographic algorithms? -
CORRECT ANSWER Symmetric uses the same key for encryption and decryption, while
asymmetric uses a pair of keys (public and private).
What types of files can steganography be applied to? - CORRECT ANSWER Image, audio,
or video files.
What is the main goal of cryptographic limitations and attacks? - CORRECT ANSWER To
understand the vulnerabilities and potential breaches in cryptographic systems.
