Cryptography & Network Security (Midterm Notes) –
Questions & Solutions
Security attacks are classified as either passive or aggressive ✔️Ans -
False
Authentication protocols and encryption algorithms are examples of
security mechanisms ✔️Ans - True
Symmetric encryption is used to conceal the contents of blocks or streams
of data of any size, including messages, files, encryption keys, and
passwords ✔️Ans - True
The data integrity service inserts bits into gaps in a data stream to
frustrate traffic analysis attempts ✔️Ans - False
Data origin authentication does not provide protection against the
modification of data units ✔️Ans - True
____________ 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
Authentication Protocols
Asymmetric Encryption
Symmetric Encryption
Data Integrity Algorithm ✔️Ans - Asymmetric Encryption
A common technique for masking contents of messages or other
information traffic so that opponents can not extract the information from
the message is ___________
integrity
masquerade
encryption
analysis ✔️Ans - encryption
A loss of ________ is the unauthorized disclosure of information
, authenticity
confidentiality
reliability
integrity ✔️Ans - confidentiality
Verifying that users are who they say they are and that each input arriving
at the system came from a trusted source is __________
integrity
authenticity
accountability
credibility ✔️Ans - authenticity
A(n) ____________ is a potential for violation of security, which exists when
there is a circumstance, capability, action or event that could breach
security and cause harm
risk
attack vector
attack
threat ✔️Ans - threat
An _______ attack attempts to alter system resources of affect their operation
eavesdropping
passive
active
rude ✔️Ans - active
A loss of _________ is the unauthorized modification of information
integrity
temper
signal
confidentiality ✔️Ans - integrity
Questions & Solutions
Security attacks are classified as either passive or aggressive ✔️Ans -
False
Authentication protocols and encryption algorithms are examples of
security mechanisms ✔️Ans - True
Symmetric encryption is used to conceal the contents of blocks or streams
of data of any size, including messages, files, encryption keys, and
passwords ✔️Ans - True
The data integrity service inserts bits into gaps in a data stream to
frustrate traffic analysis attempts ✔️Ans - False
Data origin authentication does not provide protection against the
modification of data units ✔️Ans - True
____________ 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
Authentication Protocols
Asymmetric Encryption
Symmetric Encryption
Data Integrity Algorithm ✔️Ans - Asymmetric Encryption
A common technique for masking contents of messages or other
information traffic so that opponents can not extract the information from
the message is ___________
integrity
masquerade
encryption
analysis ✔️Ans - encryption
A loss of ________ is the unauthorized disclosure of information
, authenticity
confidentiality
reliability
integrity ✔️Ans - confidentiality
Verifying that users are who they say they are and that each input arriving
at the system came from a trusted source is __________
integrity
authenticity
accountability
credibility ✔️Ans - authenticity
A(n) ____________ is a potential for violation of security, which exists when
there is a circumstance, capability, action or event that could breach
security and cause harm
risk
attack vector
attack
threat ✔️Ans - threat
An _______ attack attempts to alter system resources of affect their operation
eavesdropping
passive
active
rude ✔️Ans - active
A loss of _________ is the unauthorized modification of information
integrity
temper
signal
confidentiality ✔️Ans - integrity
