Cryptography and Network Security
Principles UPDATED ACTUAL Exam
Questions and CORRECT Answers
Asymmetric encryption - CORRECT ANSWER - 1. Is the most common method used to
conceal small blocks of data, such as encryption keys and hash function values, which are used
in digital signatures
encryption - CORRECT ANSWER - 2. A common technique for masking contents of
messages or other information traffic so that opponents cannot extract the information from the
message is.
Replay - CORRECT ANSWER - 3. Involves the passive capture of a data unit and its
subsequent retransmission to produce an unauthorized effect.
Layering - CORRECT ANSWER - 4. Refers to the use of multiple, overlapping protection
approaches addressing the people, technology, and operational aspects of information systems.
Confidentiality - CORRECT ANSWER - 5. A loss of __________ is the unauthorized
disclosure of information
Authenticity - CORRECT ANSWER - 6. Verifying that users are who they say they are
and that each input arriving at the system came from a trusted source is
Moderate - CORRECT ANSWER - 7. A _________ level breach of security could cause a
significant degradation in mission capability to an extent and duration that the organization is
able to perform its primary functions, but the effectiveness of the functions is significantly
reduced.
Security Attack - CORRECT ANSWER - 8. A __________ is any action that compromises
the security of information owned by an organization
, masquerade - CORRECT ANSWER - 9. A __________ takes place when one entity
pretends to be a different entity.
Availability - CORRECT ANSWER - A(n) __________ service is one that protects a
system to ensure its availability and addresses the security concerns raised by denial- of- service
attacks.
Substitution - CORRECT ANSWER - 1. Techniques map plaintext elements (characters,
bits) into ciphertext elements.
One Time Pad - CORRECT ANSWER - 2. Joseph Mauborgne proposed an improvement
to the Vernam cipher that uses a random key that is as long as the message so that the key does
not need to be repeated. The key is used to encrypt and decrypt a single message and then is
discarded. Each new message requires a new key of the same length as the new message. This
scheme is known as a(n)
plaintext, ciphertext - CORRECT ANSWER - 3. An original intelligible message fed into
the algorithm as input is known as _________ , while the coded message produced as output is
called the
Deciphering - CORRECT ANSWER - 4. Restoring the plaintext from the ciphertext is
Brute force - CORRECT ANSWER - 5. A __________ attack involves trying every
possible key until an intelligible translation of the ciphertext is obtained
Cryptanalyses - CORRECT ANSWER - 6. Techniques used for deciphering a message
without any knowledge of the enciphering details is.
Decryption Algorithm - CORRECT ANSWER - 7. The ___________ takes the ciphertext
and the secret key and produces the original plaintext. It is essentially the encryption algorithm
run in reverse
Principles UPDATED ACTUAL Exam
Questions and CORRECT Answers
Asymmetric encryption - CORRECT ANSWER - 1. Is the most common method used to
conceal small blocks of data, such as encryption keys and hash function values, which are used
in digital signatures
encryption - CORRECT ANSWER - 2. A common technique for masking contents of
messages or other information traffic so that opponents cannot extract the information from the
message is.
Replay - CORRECT ANSWER - 3. Involves the passive capture of a data unit and its
subsequent retransmission to produce an unauthorized effect.
Layering - CORRECT ANSWER - 4. Refers to the use of multiple, overlapping protection
approaches addressing the people, technology, and operational aspects of information systems.
Confidentiality - CORRECT ANSWER - 5. A loss of __________ is the unauthorized
disclosure of information
Authenticity - CORRECT ANSWER - 6. Verifying that users are who they say they are
and that each input arriving at the system came from a trusted source is
Moderate - CORRECT ANSWER - 7. A _________ level breach of security could cause a
significant degradation in mission capability to an extent and duration that the organization is
able to perform its primary functions, but the effectiveness of the functions is significantly
reduced.
Security Attack - CORRECT ANSWER - 8. A __________ is any action that compromises
the security of information owned by an organization
, masquerade - CORRECT ANSWER - 9. A __________ takes place when one entity
pretends to be a different entity.
Availability - CORRECT ANSWER - A(n) __________ service is one that protects a
system to ensure its availability and addresses the security concerns raised by denial- of- service
attacks.
Substitution - CORRECT ANSWER - 1. Techniques map plaintext elements (characters,
bits) into ciphertext elements.
One Time Pad - CORRECT ANSWER - 2. Joseph Mauborgne proposed an improvement
to the Vernam cipher that uses a random key that is as long as the message so that the key does
not need to be repeated. The key is used to encrypt and decrypt a single message and then is
discarded. Each new message requires a new key of the same length as the new message. This
scheme is known as a(n)
plaintext, ciphertext - CORRECT ANSWER - 3. An original intelligible message fed into
the algorithm as input is known as _________ , while the coded message produced as output is
called the
Deciphering - CORRECT ANSWER - 4. Restoring the plaintext from the ciphertext is
Brute force - CORRECT ANSWER - 5. A __________ attack involves trying every
possible key until an intelligible translation of the ciphertext is obtained
Cryptanalyses - CORRECT ANSWER - 6. Techniques used for deciphering a message
without any knowledge of the enciphering details is.
Decryption Algorithm - CORRECT ANSWER - 7. The ___________ takes the ciphertext
and the secret key and produces the original plaintext. It is essentially the encryption algorithm
run in reverse
