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WorksheetsInformation Security, Cryptography, Linux Quiz
Total questions: 100
Worksheet time: 56mins
What does 'integrity of data' mean?
"Accuracy and completeness of the data"
"Data should be viewable at all times"
"Data should be access by only the right people"
"None of the above"
A group of computers that is networked together and used by hackers to steal info. is called..
Botnet
Rootkit
DDoS
Operating System
Which of the following four passwords is the most secure?
Boat123
WTh!5Z
into*48
123456
What kind of cyber security risks can be minimised by using a Virtual Private Network (VPN)?
Use of insecure Wi-Fi networks
Key-Logging
De-anonymization by network operators
Phishing attacks
You receive a suspicious email that contains a link to a website. what should you do?
Inform IT about the email and do not open it
"Click on the link and open it to see where it goes"
"Go to the internet explorer and type the link"
"Forward it to a colleague and have them open it first"
Which is an example of PII? (Personally Identifiable Information)
Credit Card Number
Name
Home Address
All of the above
What is a step that you can take to minimise the chance and impact of a ransomware attack?
"All of these answers"
"Keep your computer software up to date"
"Ensure that anti-virus tools are running and up to date"
"Ensure that you are backing up your critical files"
Who you are allowed to give your password to?
"Anybody you trust"
"Only supervisors and authorised IT staff if requested"
"Only IT staff"
"Nobody"
What are the three traids of cybersecurity?
Confidentially, Integrity, Availability
Confidentially, Intellectual, Availability
Combining, Intellectual, Accessibility
Combining, Integrity, Accessibility
Alice told her friend Bob about her email password. And then she found Bob changed some her emails and sent emails to others. What traids are involved into this case?
Confidentially and Integrity
Integrity and Availability
Confidentally and Availability
Confidentally, Integrity and Availability
Alice told her friend Bob about her email password. And then she found Bob used her email sent emails to others. Who is responsible for this case?
Alice
Bob
Alice and Bob
If Alice sent some malware to Bob company's servers, who is responsible to this case?
Alice
Bob
Alice and Bob
Alice inserts a trojan program into Bob's laptop, and she found out Bob's password of his bank accounts. She did not take any money, so does she violate any laws?
Yes, she violated laws of Trade Secret, Business Secret
Yes, she violated laws of cybersecurity
No she did not
Yes, she violate the polity
Alice needs to withdraw some money from ATM machine. When she takes her money out she did not have the awareness of hiding her password when she input. So her money has been stolen. What this case can tell?
Alice violated confidentally traid.
Alice violated Integrity traid
Alice violated availability traid
The guy took her money violated availability traid
What is an important disadvantage of using a public key algorithm compared to a symmetric algorithm?
Asymmetric algorithm provides better access control.
Asymmetric algorithm is a faster process.
Asymmetric algorithm provides nonrepudiation of delivery.
Asymmetric algorithm is more difficult to implement.
When a user needs to provide message integrity, what options may be best?
Send a digital signature of the message to the recipient
Encrypt the message with a symmetric algorithm and send it
Encrypt the message with a private key so the recipient can decrypt with
the corresponding public key
Create a checksum, append it to the message, encrypt the message, then
send to recipient.
The two methods of encrypting data are?
Substitution and transposition
Block and stream
Symmetric and asymmetric
DES and AES
Cryptography supports all of the core principles of information security except
Availability
Confidentiality
Integrity
Authenticity
The only cipher system said to be unbreakable by brute force is
AES
DES
One-time pad
Triple DES
Data that is in an unencrypted form is referred to as which of the following?
plain text
crypt text
cleartext
simpletext
In which type of encryption is the same key used to encrypt and decrypt data?
public
asymmetric
symmetric
private
What alternative term can be used to describe asymmetric cryptographic algorithms?
public key cryptography
user key cryptography
private key cryptography
cipher-text cryptography
What type of cryptography uses two keys on both ends i.e a private and a public key?
shared
asymmetric
symmetric
open
Plaintext
original message
coded message
algorithm for transforming plaintext to ciphertext
info used in cipher known only to sender/receiver
ciphertext
field of both cryptography and cryptanalysis
study of encryption principles/methods
converting plaintext to ciphertext
coded message
cryptanalysis
field of both cryptography and cryptanalysis
study of encryption principles/methods
study of principles/methods of deciphering ciphertext without knowing key
converting plaintext to ciphertext
Non-repudiation
Ensure message remains secret during transmission between parties
Ensure message is not altered while in transit between communicating partners
Verifies sender is who she says she is
Proves that nobody but on sender could have sent a particular message
1. In symmetric-key cryptography, the key locks and unlocks the box is
same
shared
private
public
2. The keys used in cryptography are
secret key
private key
public key
all of them
3. Cryptography, a word with Greek origins, means
corrupting data
secret writing
open writing
closed writing
4. A transposition cipher reorders (permutes) symbols in a
block of packets
block of slots
block of signals
block of symbols
Network Security provides authentication and access control for resources.
true
False
6. Which is not an objective of network security?
identification
authentication
access control
lock
11. A process of making the encrypted text readable again.
decryption
encryption
network security
information hiding
14. An asymmetric-key (or public-key) cipher uses
1 key
2 key
3 key
4 key
18. The man-in-the-middle attack can endanger the security of the diffie-hellman if two parties are not
authenticated
joined
submit
separate
19. Which of the following is not a transport layer vulnerability?
A. mishandling of undefined , poorly defined
B. the vulnerability that allows fingerprinting & other enumeration of host information
C. overloading of transporting layer mechanisms
D. unauthorized network access
24. What is data encryption standard (DES)?
A. block cipher
B. stream cipher
C. bit cipher
D. byte cipher
23. In cryptography, the order of the letters in a message is rearrangedby
A. transpositional ciphers
B. substitution ciphers
C. both
D. quadratic ciphers
What is an important disadvantage of using a public key algorithm compared to a symmetric algorithm?
Asymmetric algorithm provides better access control.
Asymmetric algorithm is a faster process.
Asymmetric algorithm provides nonrepudiation of delivery.
Asymmetric algorithm is more difficult to implement.
In asymmetric key cryptography, the private key is kept by __________
Sender
Receiver
Sender & Receiver
All connected devices to the network
In cryptography, the order of the letters in a message is rearranged by __________
transpositional ciphers
Substitution cipher
Both transpositional and substitution ciphers
Quadratic ciphers
Encryption transforms readable data, known as (a) , into an unreadable format called ciphertext.
In an asymmetric communication between 6 people, how many keys do you need to communicate
(a)
In a private key cryptographic communication, how many keys do you need to communicate between 2 people
(a)
Steganography offers an advantage over encryption because:
It provides a higher level of security against unauthorized access.
It scrambles the data itself, making it unreadable without a key.
It hides the existence of the data, making it less likely to be detected.
It is faster and more efficient for processing large amounts of data.
Type of Encryption: If the same key is used to encrypt and decrypt a message, this is known as?
(a)
What type of key can be freely shared with anyone so that they can encrypt a message?
(a)
the process of converting information or data into a code, especially to prevent unauthorized access
(a)
True or False.
An encryption key is used to help decrypt messages.
False
Information that is readable without performing any cryptographic operations.
(a)
Encryption is a way of __________________
Hacking Passwords
Securing Information on a network
Securing Viruses
Deleting Application
Give 2 reason why we use Encryption based on the discussion
Efficiency
Scalability
Which of the following best describes encryption?
A process of hiding data so it cannot be accessed or understood without proper authorization.
A method for compressing data to save storage space.
A technique for converting data into a different format for easier transmission.
A way to increase the speed of data transmission over a network.
In public key cryptography, what is the private key used for?
Encrypting data
Decrypting data
Verifying digital signatures
Generating digital signatures
What is the primary purpose of encryption in computer security?
Preventing data loss
Ensuring data availability
Protecting data confidentiality
Accelerating data transmission
What is Quantum Key Distribution (QKD) primarily used for?
Increasing the speed of data transmission
Ensuring secure communication by distributing encryption keys
Generating random numbers for lottery systems
Enhancing the graphical quality of video games
Which principle of quantum mechanics is Quantum Key Distribution based on?
Newton's laws of motion
The uncertainty principle
Quantum entanglement
The theory of relativity
What does the command 'chmod 755 file.txt' do?
Sets file permissions to rwxr-xr-x for file.txt
Sets file permissions to rwxrwxrwx for file.txt
Sets file permissions to rw-r--r-- for file.txt
Sets file permissions to r--r--r-- for file.txt
How can you check the current permissions of a file in Linux?
Use the command 'ls -l filename'.
Run 'cat filename' to view permissions.
Check the file properties in the GUI.
Use the command 'chmod filename'.
Which command is used to execute a shell script?
start script.sh
execute script.sh
run script.sh
bash script.sh or ./script.sh
How do you install a package using apt in Debian-based systems?
install
sudo apt-get
apt-get install
Use the command 'sudo apt install
What command would you use to remove a package in RPM-based systems?
rpm remove package_name
rpm delete package_name
rpm -e package_name
rpm uninstall package_name
What command displays the current network configuration in Linux?
ping
ifconfig or ip addr
netstat
traceroute
How do you add a new user in Linux?
Use the command 'sudo useradd
Use the command 'adduser
Execute 'useradd -m
Run 'sudo newuser
What command would you use to change a user's password?
set-password
change-password
update-user-password
passwd
How can you list all users on a Linux system?
Check the file '/etc/group'
Use the command 'ls /home'
Use the command 'cat /etc/passwd' or 'cut -d: -f1 /etc/passwd'.
Run 'whoami' to see current user
What is the function of the 'ifconfig' command?
To monitor CPU usage and performance.
To manage user accounts on the system.
To configure and manage network interfaces.
To display the current date and time.
What command is used to check system uptime?
sysinfo
check uptime
uptime
status
What is the purpose of the 'useradd' command in Linux?
To create a new user account on the system.
To list all user accounts on the system.
To modify user permissions on the system.
To delete a user account from the system.
Which is the core of the operating system?
Shell
Kernel
Commands
Script
Which command is used to display the operating system name
os
kernel
unix
uname
Command used to count number of character in a file is
cut
grep
wc
count
pwd command displays
user password
present working directory
none of the mentioned
password file content
How do you rename file “new” to file “old”?
mv new old
move new old
rn new old
cp new old
User passwords are stored in
/etc/password
/etc/passwd
/root/passwd
/root/password
To get info about a command we use
man
ls
help
info
Who is the creator of Linux ?💻
Linus Torvalds
Charles Babbage
Dennis Ritchie
Different versions of Linux OS is called _________
Kernal
Shell
Wildcard
Distributaries
When was linux found?
1983
1985
1991
2000
what command is used to remove files?
dm
rm
delete
erase
Which of the following information can be viewed using "ifconfig" command in the Linux operating system?
IP address
Mac address
MTU
All of the above
What type of file is firefox.deb located at /root?
Directory
Shell script
Data file
Debian binary package file
Which directory contains the files related to the block devices that can be seen when running the lsblk command?
/media
/devices
/mount
/dev
Which of the following package managers would you use on a debian based distro?
yum
dpkg
rpm
install
Which access control file has the encryped password for the users?
/etc/shadow
/etc/passwd
/etc/group
/etc/sudoers
How many maximum partitions (primary or extended ) can an MBR have?
10
2
4
1
Which of the following filesystems does not use a journal
ext3
ext2
ext4
filesystem
