Question # 1
Within the context of Computer Security, which of the following statements describes Social Engineering best?
| | A. Social Engineering is the act of publicly disclosing information
| | B. Social Engineering is the means put in place by human resource to perform time accounting
| | C. Social Engineering is the act of getting needed information from a person rather than breaking into a system
| | D. Social Engineering is a training program within sociology studies |
C. Social Engineering is the act of getting needed information from a person rather than breaking into a system
Question # 2
An attacker identified that a user and an access point are both compatible with WPA2 and WPA3 encryption. The attacker installed a rogue access point with only WPA2 compatibility in the vicinity and forced the victim to go through the WPA2 four-way handshake to get
connected. After the connection was established, the attacker used automated tools to
crack WPA2-encrypted messages. What is the attack performed in the above scenario?
| | A. Timing-based attack
| | B. Side-channel attack
| | C. Downgrade security attack
| | D. Cache-based attack |
Question # 3
in this form of encryption algorithm, every Individual block contains 64-bit data, and three
keys are used, where each key consists of 56 bits. Which is this encryption algorithm?
| | A. IDEA
| | B. Triple Data Encryption standard
| | C. MDS encryption algorithm
| | D. AES |
B. Triple Data Encryption standard
Explanation:
Triple DES is another mode of DES operation. It takes three 64-bit keys, for an overall key
length of 192 bits. In Stealth, you merely type within the entire 192-bit (24 character) key
instead of entering each of the three keys individually. The Triple DES DLL then breaks the
user-provided key into three subkeys, padding the keys if necessary in order that they are
each 64 bits long. The procedure for encryption is strictly an equivalent as regular DES, but
it’s repeated 3 times , hence the name Triple DES. the info is encrypted with the primary
key, decrypted with the second key, and eventually encrypted again with the third
key.Triple DES runs 3 times slower than DES, but is far safer if used properly. The
procedure for decrypting something is that the same because the procedure for encryption,
except it’s executed in reverse. Like DES, data is encrypted and decrypted in 64-bit
chunks. Although the input key for DES is 64 bits long, the particular key employed by DES
is merely 56 bits long . the smallest amount significant (right-most) bit in each byte may be
a parity , and will be set in order that there are always an odd number of 1s in every byte.
These parity bits are ignored, so only the seven most vital bits of every byte are used,
leading to a key length of 56 bits. this suggests that the effective key strength for TripleDES is really 168 bits because each of the three keys contains 8 parity bits that aren’t used
during the encryption process.Triple DES ModesTriple ECB (Electronic Code Book)• This
variant of Triple DES works precisely the same way because the ECB mode of DES.• this
is often the foremost commonly used mode of operation.Triple CBC (Cipher Block
Chaining)• This method is extremely almost like the quality DES CBC mode.• like Triple
ECB, the effective key length is 168 bits and keys are utilized in an equivalent manner, as
described above, but the chaining features of CBC mode also are employed.• the primary
64-bit key acts because the Initialization Vector to DES.• Triple ECB is then executed for
one 64-bit block of plaintext.• The resulting ciphertext is then XORed with subsequent
plaintext block to be encrypted, and therefore the procedure is repeated.• This method
adds an additional layer of security to Triple DES and is therefore safer than Triple ECB,
although it’s not used as widely as Triple ECB.
Question # 4
Which among the following is the best example of the hacking concept called "clearing
tracks"?
| | A. After a system is breached, a hacker creates a backdoor to allow re-entry into a system.
| | B. During a cyberattack, a hacker injects a rootkit into a server.
| | C. An attacker gains access to a server through an exploitable vulnerability.
| | D. During a cyberattack, a hacker corrupts the event logs on all machines |
D. During a cyberattack, a hacker corrupts the event logs on all machines
Question # 5
Stephen, an attacker, targeted the industrial control systems of an organization. He
generated a fraudulent email with a malicious attachment and sent it to employees of the
target organization. An employee who manages the sales software of the operational plant
opened the fraudulent email and clicked on the malicious attachment. This resulted in the
malicious attachment being downloaded and malware being injected into the sales
software maintained in the victim's system. Further, the malware propagated itself to other
networked systems, finally damaging the industrial automation components. What is the
attack technique used by Stephen to damage the industrial systems?
| | A. Spear-phishing attack
| | B. SMishing attack
| | C. Reconnaissance attack
| | D. HMI-based attack |
Question # 6
What type of virus is most likely to remain undetected by antivirus software?
| | A. Cavity virus
| | B. Stealth virus
| | C. File-extension virus
| | D. Macro virus |
Question # 7
During a recent security assessment, you discover the organization has one Domain Name
Server (DNS) in a Demilitarized Zone (DMZ) and a second DNS server on the internal network.
What is this type of DNS configuration commonly called?
| | A. DynDNS
| | B. DNS Scheme
| | C. DNSSEC
| | D. Split DNS |
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