Fundamentals of Cryptography in
Information Security Exam 2025
Questions and Answers 100% Pass
What is cryptography? - ANSWER-The practice of transforming information so
that its meaning cannot be understood by unauthorized parties.
What are the two main methods of cryptography? - ANSWER-Transposition,
where each letter of the message is rearranged, and substitution, where one letter is
substituted for another.
What is the process of changing original text into a scrambled message called? -
ANSWER-Encryption.
What is the reverse process of encryption? - ANSWER-Decryption.
What is plaintext in the context of cryptography? - ANSWER-Unencrypted data
that is input for encryption or the output of decryption.
What is ciphertext? - ANSWER-The scrambled and unreadable output of
encryption.
What is steganography? - ANSWER-The practice of hiding the existence of data.
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, How can steganography be achieved? - ANSWER-By dividing data and hiding it in
unused portions of a file.
What types of files can contain hidden messages in steganography? - ANSWER-
Image, audio, or video files.
Where is data commonly hidden in a file using steganography? - ANSWER-In the
file header fields or between sections of the metadata.
What is a common example of how steganography can be visually represented? -
ANSWER-Changing the last bits of color squares in an image without visible
impact, such as forming a word.
What are the module objectives for this lesson on cryptography? - ANSWER-
Define cryptography, describe hash, symmetric, and asymmetric algorithms, list
uses of cryptography, and explain limitations and attacks.
What is the significance of metadata in steganography? - ANSWER-Metadata
describes the content or structure of the actual data and can be used to hide
information.
What is plaintext in cryptography? - ANSWER-Plaintext is the original data input
into a cryptographic algorithm for encryption.
What is a cryptographic algorithm? - ANSWER-A cryptographic algorithm, also
known as a cipher, is a procedure based on a mathematical formula used to encrypt
and decrypt data.
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
Information Security Exam 2025
Questions and Answers 100% Pass
What is cryptography? - ANSWER-The practice of transforming information so
that its meaning cannot be understood by unauthorized parties.
What are the two main methods of cryptography? - ANSWER-Transposition,
where each letter of the message is rearranged, and substitution, where one letter is
substituted for another.
What is the process of changing original text into a scrambled message called? -
ANSWER-Encryption.
What is the reverse process of encryption? - ANSWER-Decryption.
What is plaintext in the context of cryptography? - ANSWER-Unencrypted data
that is input for encryption or the output of decryption.
What is ciphertext? - ANSWER-The scrambled and unreadable output of
encryption.
What is steganography? - ANSWER-The practice of hiding the existence of data.
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 1
, How can steganography be achieved? - ANSWER-By dividing data and hiding it in
unused portions of a file.
What types of files can contain hidden messages in steganography? - ANSWER-
Image, audio, or video files.
Where is data commonly hidden in a file using steganography? - ANSWER-In the
file header fields or between sections of the metadata.
What is a common example of how steganography can be visually represented? -
ANSWER-Changing the last bits of color squares in an image without visible
impact, such as forming a word.
What are the module objectives for this lesson on cryptography? - ANSWER-
Define cryptography, describe hash, symmetric, and asymmetric algorithms, list
uses of cryptography, and explain limitations and attacks.
What is the significance of metadata in steganography? - ANSWER-Metadata
describes the content or structure of the actual data and can be used to hide
information.
What is plaintext in cryptography? - ANSWER-Plaintext is the original data input
into a cryptographic algorithm for encryption.
What is a cryptographic algorithm? - ANSWER-A cryptographic algorithm, also
known as a cipher, is a procedure based on a mathematical formula used to encrypt
and decrypt data.
COPYRIGHT ©️ 2025 ALL RIGHTS RESERVED...TRUSTED & VERIFIED 2
