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Cryptography And Network Security Principles – Q&A
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Cryptography And Network Security Principles – Q&A
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Cryptography And Network Security Principles – Q&AAsymmetric encryption ✔️Ans - Q1. 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 ✔️Ans - Q2. A common technique for masking contents of
messages or other information traffic so that opponents cannot extract the
information from the message is.
Replay ✔️Ans - Q3. Involves the passive capture of a data unit and its
subsequent retransmission to produce an unauthorized effect.
Layering ✔️Ans - Q4. Refers to the use of multiple, overlapping
protection approaches addressing the people, technology, and operational
aspects of information systems.
Confidentiality ✔️Ans - Q5. A loss of __________ is the unauthorized
disclosure of information
Authenticity ✔️Ans - Q6. Verifying that users are who they say they
are and that each input arriving at the system came from a trusted source
is
Moderate ✔️Ans - Q7. 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 ✔️Ans - Q8. A __________ is any action that
compromises the security of information owned by an organization
masquerade ✔️Ans - Q9. A __________ takes place when one entity
pretends to be a different entity.
Availability ✔️Ans - QA(n) __________ service is one that protects a
system to ensure its availability and addresses the security concerns raised
by denial- of- service attacks.
, Substitution ✔️Ans - Q1. Techniques map plaintext elements
(characters, bits) into ciphertext elements.
One Time Pad ✔️Ans - Q2. 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 ✔️Ans - Q3. An original intelligible message fed
into the algorithm as input is known as _________ , while the coded message
produced as output is called the
Deciphering ✔️Ans - Q4. Restoring the plaintext from the ciphertext
is
Brute force ✔️Ans - Q5. A __________ attack involves trying every
possible key until an intelligible translation of the ciphertext is obtained
Cryptanalyses ✔️Ans - Q6. Techniques used for deciphering a
message without any knowledge of the enciphering details is.
Decryption Algorithm ✔️Ans - Q7. The ___________ takes the ciphertext
and the secret key and produces the original plaintext. It is essentially the
encryption algorithm run in reverse
conventional encryption ✔️Ans - Q8. If both sender and receiver use
the same key, the system is referred to as
Cryptanalytic ✔️Ans - Q9. attacks exploit the characteristics of the
algorithm to attempt to deduce a specific plaintext or to deduce the key
being used
Playfair Cipher ✔️Ans - Q10. The __________ was used as the standard
field system by the British Army in World War I and was used by the U.S.
Army and other Allied forces during World War II.
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