[Jul-2024] 312-50v12 Exam Dumps Pass with Updated 2024 Certified Ethical Hacker Exam
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The Certified Ethical Hacker (CEH) certification is one of the most sought-after and recognized certifications in the field of cybersecurity. Certified Ethical Hacker Exam certification is offered by the International Council of E-Commerce Consultants (EC-Council) and is designed to equip individuals with the skills and knowledge to identify vulnerabilities in computer systems and networks and to develop effective countermeasures to prevent cyber-attacks. The CEH certification is highly valued by employers and is considered a benchmark for hiring professionals in the cybersecurity industry.
The CEH certification is ideal for professionals in the field of cybersecurity who want to enhance their skills and knowledge. Certified Ethical Hacker Exam certification is also useful for IT professionals who want to gain a better understanding of how to secure their organizations' networks and systems. Certified Ethical Hacker Exam certification is recognized by major companies and organizations around the world, making it a valuable asset for anyone who wants to advance their career in cybersecurity.
NEW QUESTION # 251
The tools which receive event logs from servers, network equipment, and applications, and perform analysis and correlation on those logs, and can generate alarms for security relevant issues, are known as what?
- A. network Sniffer
- B. Vulnerability Scanner
- C. Intrusion prevention Server
- D. Security incident and event Monitoring
Answer: D
NEW QUESTION # 252
What kind of detection techniques is being used in antivirus software that identifies malware by collecting data from multiple protected systems and instead of analyzing files locally it's made on the provider's environment?
- A. Behavioral based
- B. Cloud based
- C. Honeypot based
- D. Heuristics based
Answer: B
NEW QUESTION # 253
Which iOS jailbreaking technique patches the kernel during the device boot so that it becomes jailbroken after each successive reboot?
- A. Untethered jailbreaking
- B. Semi-Untethered jailbreaking
- C. Semi-tethered jailbreaking
- D. Tethered jailbreaking
Answer: A
Explanation:
An untethered jailbreak is one that allows a telephone to finish a boot cycle when being pwned with none interruption to jailbreak-oriented practicality.
Untethered jailbreaks area unit the foremost sought-after of all, however they're additionally the foremost difficult to attain due to the powerful exploits and organic process talent they need. associate unbound jailbreak is sent over a physical USB cable association to a laptop or directly on the device itself by approach of associate application-based exploit, like a web site in campaign.
Upon running associate unbound jailbreak, you'll be able to flip your pwned telephone off and on once more while not running the jailbreak tool once more. all of your jailbreak tweaks and apps would then continue in operation with none user intervention necessary.
It's been an extended time since IOS has gotten the unbound jailbreak treatment. the foremost recent example was the computer-based Pangu break, that supported most handsets that ran IOS nine.1. We've additionally witnessed associate unbound jailbreak within the kind of JailbreakMe, that allowed users to pwn their handsets directly from the mobile campaign applications programme while not a laptop.
NEW QUESTION # 254
Which of the following steps for risk assessment methodology refers to vulnerability identification?
- A. Identifies sources of harm to an IT system. (Natural, Human. Environmental)
- B. Determines risk probability that vulnerability will be exploited (High. Medium, Low)
- C. Assigns values to risk probabilities; Impact values.
- D. Determines if any flaws exist in systems, policies, or procedures
Answer: B
NEW QUESTION # 255
You are analysing traffic on the network with Wireshark. You want to routinely run a cron job which will run the capture against a specific set of IPs - 192.168.8.0/24. What command you would use?
- A. wireshark --fetch ''192.168.8*''
- B. sudo tshark -f''net 192 .68.8.0/24''
- C. wireshark --capture --local masked 192.168.8.0 ---range 24
- D. tshark -net 192.255.255.255 mask 192.168.8.0
Answer: B
NEW QUESTION # 256
Widespread fraud ac Enron. WorldCom, and Tyco led to the creation of a law that was designed to improve the accuracy and accountability of corporate disclosures. It covers accounting firms and third parties that provide financial services to some organizations and came into effect in 2002. This law is known by what acronym?
- A. HIPAA
- B. SOX
- C. Fed RAMP
- D. PCIDSS
Answer: B
Explanation:
The Sarbanes-Oxley Act of 2002 could be a law the U.S. Congress passed on July thirty of that year to assist defend investors from fallacious money coverage by companies.Also called the SOX Act of 2002 and also the company Responsibility Act of 2002, it mandated strict reforms to existing securities rules and obligatory powerful new penalties on law breakers.
The Sarbanes-Oxley law Act of 2002 came in response to money scandals within the early 2000s involving in public listed corporations like Enron Corporation, Tyco International plc, and WorldCom. The high-profile frauds cask capitalist confidence within the trustiness of company money statements Associate in Nursingd light-emitting diode several to demand an overhaul of decades-old restrictive standards.
NEW QUESTION # 257
An attacker decided to crack the passwords used by industrial control systems. In this process, he employed a loop strategy to recover these passwords. He used one character at a time to check whether the first character entered is correct; if so, he continued the loop for consecutive characters. If not, he terminated the loop. Furthermore, the attacker checked how much time the device took to finish one complete password authentication process, through which he deduced how many characters entered are correct.
What is the attack technique employed by the attacker to crack the passwords of the industrial control systems?
- A. Denial-of-service attack
- B. Buffer overflow attack
- C. Side-channel attack
- D. HMI-based attack
Answer: D
NEW QUESTION # 258
As a budding cybersecurity enthusiast, you have set up a small lab at home to learn more about wireless network security. While experimenting with your home Wi-Fi network, you decide to use a well-known hacking tool to capture network traffic and attempt to crack the Wi-Fi password. However, despite many attempts, you have been unsuccessful. Your home Wi-Fi network uses WPA2 Personal with AES encryption.
Why are you finding it difficult to crack the Wi-Fi password?
- A. Your hacking tool is outdated
- B. The Wi-Fi password is too complex and long
- C. The network is using MAC address filtering.
- D. The network is using an uncrackable encryption method
Answer: D
Explanation:
The network is using an uncrackable encryption method, which makes it difficult to crack the Wi-Fi password.
WPA2 Personal with AES encryption is the strongest form of security offered by Wi-Fi devices at the moment, and it should be used for all purposes. AES stands for Advanced Encryption Standard, and it is a symmetric-key algorithm that uses a 128-bit, 192-bit, or 256-bit key to encrypt and decrypt data. AES is considered to be uncrackable by brute force attacks, as it would take an impractical amount of time and computational power to try all possible key combinations12. Therefore, unless you have access to the Wi-Fi password or the encryption key, you will not be able to decrypt the network traffic and crack the password.
The other options are not correct for the following reasons:
* A. The Wi-Fi password is too complex and long: This option is not relevant because the Wi-Fi password is not directly used to encrypt the network traffic. Instead, the password is used to generate a Pre-Shared Key (PSK), which is then used to derive a Pairwise Master Key (PMK), which is then used to derive a Pairwise Transient Key (PTK), which is then used to encrypt the data. Therefore, the complexity and length of the password do not affect the encryption strength, as long as the password is not easily guessed or leaked34.
* B. Your hacking tool is outdated: This option is not plausible because even if your hacking tool is outdated, it would not affect your ability to capture the network traffic and attempt to crack the password. The hacking tool may not support the latest Wi-Fi standards or protocols, but it should still be able to capture the raw data packets and save them in a file. The cracking process would depend on the encryption algorithm and the key, not on the hacking tool.
* D. The network is using MAC address filtering: This option is not feasible because MAC address filtering is a technique that restricts network access and communication to trusted devices based on their MAC addresses, which are unique identifiers assigned to network interfaces. MAC address filtering can prevent unauthorized devices from joining the network, but it cannot prevent authorized devices from capturing the network traffic. Moreover, MAC address filtering can be easily bypassed by spoofing the MAC address of an allowed device56.
References:
* 1: What is AES Encryption and How Does it Work? | Kaspersky
* 2: AES Encryption: Everything You Need to Know | Comparitech
* 3: How Does WPA2 Work? | Techwalla
* 4: How Does WPA2 Encryption Work? | Security Boulevard
* 5: What is MAC Address Filtering? | Definition, Types & Examples - Fortinet
* 6: How to Bypass MAC Address Filtering on Wireless Networks - Null Byte :: WonderHowTo
NEW QUESTION # 259
The change of a hard drive failure is once every three years. The cost to buy a new hard drive is $300. It will require 10 hours to restore the OS and software to the new hard disk. It will require a further 4 hours to restore the database from the last backup to the new hard disk. The recovery person earns $10/hour. Calculate the SLE, ARO, and ALE. Assume the EF = 1(100%). What is the closest approximate cost of this replacement and recovery operation per year?
- A. $440
- B. $1320
- C. $100
- D. $146
Answer: D
Explanation:
1. AV (Asset value) = $300 + (14 * $10) = $440 - the cost of a hard drive plus the work of a recovery person, i.e.how much would it take to replace 1 asset? 10 hours for resorting the OS and soft + 4 hours for DB restore multiplies by hourly rate of the recovery person.
2. SLE (Single Loss Expectancy) = AV * EF (Exposure Factor) = $440 * 1 = $440
3. ARO (Annual rate of occurrence) = 1/3 (every three years, meaning the probability of occurring during 1 years is 1/3)
4. ALE (Annual Loss Expectancy) = SLE * ARO = 0.33 * $440 = $145.2
NEW QUESTION # 260
Robin, a professional hacker, targeted an organization's network to sniff all the traffic. During this process.
Robin plugged in a rogue switch to an unused port in the LAN with a priority lower than any other switch in the network so that he could make it a root bridge that will later allow him to sniff all the traffic in the network.
What is the attack performed by Robin in the above scenario?
- A. DNS poisoning attack
- B. VLAN hopping attack
- C. STP attack
- D. ARP spoofing attack
Answer: C
Explanation:
STP prevents bridging loops in a redundant switched network environment. By avoiding loops, you can ensure that broadcast traffic does not become a traffic storm.
STP is a hierarchical tree-like topology with a "root" switch at the top. A switch is elected as root based on the lowest configured priority of any switch (0 through 65,535). When a switch boots up, it begins a process of identifying other switches and determining the root bridge. After a root bridge is elected, the topology is established from its perspective of the connectivity. The switches determine the path to the root bridge, and all redundant paths are blocked. STP sends configuration and topology change notifications and acknowledgments (TCN/TCA) using bridge protocol data units (BPDU).
An STP attack involves an attacker spoofing the root bridge in the topology. The attacker broadcasts out an STP configuration/topology change BPDU in an attempt to force an STP recalculation. The BPDU sent out announces that the attacker's system has a lower bridge priority. The attacker can then see a variety of frames forwarded from other switches to it. STP recalculation may also cause a denial-of-service (DoS) condition on the network by causing an interruption of 30 to 45 seconds each time the root bridge changes. An attacker using STP network topology changes to force its host to be elected as the root bridge.
NEW QUESTION # 261
What is the first step for a hacker conducting a DNS cache poisoning (DNS spoofing) attack against an organization?
- A. The attacker forges a reply from the DNS resolver.
- B. The attacker queries a nameserver using the DNS resolver.
- C. The attacker uses TCP to poison the ONS resofver.
- D. The attacker makes a request to the DNS resolver.
Answer: D
Explanation:
https://ru.wikipedia.org/wiki/DNS_spoofing
DNS spoofing is a threat that copies the legitimate server destinations to divert the domain's traffic. Ignorant these attacks, the users are redirected to malicious websites, which results in insensitive and personal data being leaked. It is a method of attack where your DNS server is tricked into saving a fake DNS entry. This will make the DNS server recall a fake site for you, thereby posing a threat to vital information stored on your server or computer.
The cache poisoning codes are often found in URLs sent through spam emails. These emails are sent to prompt users to click on the URL, which infects their computer. When the computer is poisoned, it will divert you to a fake IP address that looks like a real thing. This way, the threats are injected into your systems as well.
Different Stages of Attack of DNS Cache Poisoning:
- The attacker proceeds to send DNS queries to the DNS resolver, which forwards the Root/TLD authoritative DNS server request and awaits an answer.
- The attacker overloads the DNS with poisoned responses that contain several IP addresses of the malicious website. To be accepted by the DNS resolver, the attacker's response should match a port number and the query ID field before the DNS response. Also, the attackers can force its response to increasing their chance of success.
- If you are a legitimate user who queries this DNS resolver, you will get a poisoned response from the cache, and you will be automatically redirected to the malicious website.
NEW QUESTION # 262
Abel, a security professional, conducts penetration testing in his client organization to check for any security loopholes. He launched an attack on the DHCP servers by broadcasting forged DHCP requests and leased all the DHCP addresses available in the DHCP scope until the server could not issue any more IP addresses. This led to a Dos attack, and as a result, legitimate employees were unable to access the clients network. Which of the following attacks did Abel perform in the above scenario?
- A. VLAN hopping
- B. STP attack
- C. Rogue DHCP server attack
- D. DHCP starvation
Answer: D
Explanation:
A DHCP starvation assault is a pernicious computerized assault that objectives DHCP workers. During a DHCP assault, an unfriendly entertainer floods a DHCP worker with false DISCOVER bundles until the DHCP worker debilitates its stock of IP addresses. When that occurs, the aggressor can deny genuine organization clients administration, or even stock an other DHCP association that prompts a Man-in-the-Middle (MITM) assault.
In a DHCP Starvation assault, a threatening entertainer sends a huge load of false DISCOVER parcels until the DHCP worker thinks they've used their accessible pool. Customers searching for IP tends to find that there are no IP addresses for them, and they're refused assistance. Furthermore, they may search for an alternate DHCP worker, one which the unfriendly entertainer may give. What's more, utilizing a threatening or sham IP address, that unfriendly entertainer would now be able to peruse all the traffic that customer sends and gets.
In an unfriendly climate, where we have a malevolent machine running some sort of an instrument like Yersinia, there could be a machine that sends DHCP DISCOVER bundles. This malevolent customer doesn't send a modest bunch - it sends a great many vindictive DISCOVER bundles utilizing sham, made-up MAC addresses as the source MAC address for each solicitation.
In the event that the DHCP worker reacts to every one of these false DHCP DISCOVER parcels, the whole IP address pool could be exhausted, and that DHCP worker could trust it has no more IP delivers to bring to the table to legitimate DHCP demands.
When a DHCP worker has no more IP delivers to bring to the table, ordinarily the following thing to happen would be for the aggressor to get their own DHCP worker. This maverick DHCP worker at that point starts giving out IP addresses.
The advantage of that to the assailant is that if a false DHCP worker is distributing IP addresses, including default DNS and door data, customers who utilize those IP delivers and begin to utilize that default passage would now be able to be directed through the aggressor's machine. That is all that an unfriendly entertainer requires to play out a man-in-the-center (MITM) assault.
NEW QUESTION # 263
Steve, a scientist who works in a governmental security agency, developed a technological solution to identify people based on walking patterns and implemented this approach to a physical control access.
A camera captures people walking and identifies the individuals using Steve's approach.
After that, people must approximate their RFID badges. Both the identifications are required to open the door. In this case, we can say:
- A. The solution will have a high level of false positives
- B. Biological motion cannot be used to identify people
- C. The solution implements the two authentication factors: physical object and physical characteristic
- D. Although the approach has two phases, it actually implements just one authentication factor
Answer: C
NEW QUESTION # 264
Annie, a cloud security engineer, uses the Docker architecture to employ a client/server model in the application she is working on. She utilizes a component that can process API requests and handle various Docker objects, such as containers, volumes. Images, and networks. What is the component of the Docker architecture used by Annie in the above scenario?
- A. Docker client
- B. Docker registries
- C. Docker objects
- D. Docker daemon
Answer: D
Explanation:
Docker uses a client-server design. The docker client talks to the docker daemon, that will the work of building, running, and distributing your docker containers. The docker client and daemon will run on the same system, otherwise you will connect a docker consumer to a remote docker daemon. The docker consumer and daemon communicate using a REST API, over OS sockets or a network interface.
The docker daemon (dockerd) listens for docker API requests and manages docker objects like pictures, containers, networks, and volumes. A daemon may communicate with other daemons to manage docker services.
NEW QUESTION # 265
Identify the correct terminology that defines the above statement.
- A. Vulnerability Scanning
- B. Designing Network Security
- C. Penetration Testing
- D. Security Policy Implementation
Answer: C
NEW QUESTION # 266
Samuel a security administrator, is assessing the configuration of a web server. He noticed that the server permits SSlv2 connections, and the same private key certificate is used on a different server that allows SSLv2 connections. This vulnerability makes the web server vulnerable to attacks as the SSLv2 server can leak key information.
Which of the following attacks can be performed by exploiting the above vulnerability?
- A. Padding oracle attack
- B. DROWN attack
- C. Side-channel attack
- D. DUHK attack
Answer: B
Explanation:
DROWN is a serious vulnerability that affects HTTPS and other services that deem SSL and TLS, some of the essential cryptographic protocols for net security. These protocols allow everyone on the net to browse the net, use email, look on-line, and send instant messages while not third-parties being able to browse the communication.
DROWN allows attackers to break the encryption and read or steal sensitive communications, as well as passwords, credit card numbers, trade secrets, or financial data. At the time of public disclosure on March
2016, our measurements indicated thirty third of all HTTPS servers were vulnerable to the attack. fortuitously, the vulnerability is much less prevalent currently. As of 2019, SSL Labs estimates that one.2% of HTTPS servers are vulnerable.
What will the attackers gain?Any communication between users and the server. This typically includes, however isn't limited to, usernames and passwords, credit card numbers, emails, instant messages, and sensitive documents. under some common scenarios, an attacker can also impersonate a secure web site and intercept or change the content the user sees.
Who is vulnerable?Websites, mail servers, and other TLS-dependent services are in danger for the DROWN attack. At the time of public disclosure, many popular sites were affected. we used Internet-wide scanning to live how many sites are vulnerable:
SSLv2
Operators of vulnerable servers got to take action. there's nothing practical that browsers or end-users will do on their own to protect against this attack.
Is my site vulnerable?Modern servers and shoppers use the TLS encryption protocol. However, because of misconfigurations, several servers also still support SSLv2, a 1990s-era precursor to TLS. This support did not matter in practice, since no up-to-date clients really use SSLv2. Therefore, despite the fact that SSLv2 is thought to be badly insecure, until now, simply supporting SSLv2 wasn't thought of a security problem, is a clients never used it.
DROWN shows that merely supporting SSLv2 may be a threat to fashionable servers and clients. It modern associate degree attacker to modern fashionable TLS connections between up-to-date clients and servers by sending probes to a server that supports SSLv2 and uses the same private key.
SSLv2
* It allows SSLv2 connections. This is surprisingly common, due to misconfiguration and inappropriate default settings.
* Its private key is used on any other serverthat allows SSLv2 connections, even for another protocol.
Many companies reuse the same certificate and key on their web and email servers, for instance. In this case, if the email server supports SSLv2 and the web server does not, an attacker can take advantage of the email server to break TLS connections to the web server.
A server is vulnerable to DROWN if:SSLv2
How do I protect my server?To protect against DROWN, server operators need to ensure that their private keys software used anyplace with server computer code that enables SSLv2 connections. This includes net servers, SMTP servers, IMAP and POP servers, and the other software that supports SSL/TLS.
Disabling SSLv2 is difficult and depends on the particular server software. we offer instructions here for many common products:
OpenSSL: OpenSSL may be a science library employed in several server merchandise. For users of OpenSSL, the simplest and recommended solution is to upgrade to a recent OpenSSL version. OpenSSL 1.0.2 users ought to upgrade to 1.0.2g. OpenSSL 1.0.1 users ought to upgrade to one.0.1s. Users of older OpenSSL versions ought to upgrade to either one in every of these versions. (Updated March thirteenth, 16:00 UTC) Microsoft IIS (Windows Server): Support for SSLv2 on the server aspect is enabled by default only on the OS versions that correspond to IIS 7.0 and IIS seven.5, particularly Windows scene, Windows Server 2008, Windows seven and Windows Server 2008R2. This support is disabled within the appropriate SSLv2 subkey for 'Server', as outlined in KB245030. albeit users haven't taken the steps to disable SSLv2, the export-grade and 56-bit ciphers that build DROWN possible don't seem to be supported by default.
Network Security Services (NSS): NSS may be a common science library designed into several server merchandise. NSS versions three.13 (released back in 2012) and higher than ought to have SSLv2 disabled by default. (A little variety of users might have enabled SSLv2 manually and can got to take steps to disable it.) Users of older versions ought to upgrade to a more moderen version. we tend to still advocate checking whether or not your non-public secret is exposed elsewhere Other affected software and in operation systems:
Instructions and data for: Apache, Postfix, Nginx, Debian, Red Hat
Browsers and other consumers: practical nothing practical that net browsers or different client computer code will do to stop DROWN. only server operators ar ready to take action to guard against the attack.
NEW QUESTION # 267
What is the proper response for a NULL scan if the port is open?
- A. No response
- B. RST
- C. PSH
- D. SYN
- E. ACK
- F. FIN
Answer: A
NEW QUESTION # 268
What is the purpose of DNS AAAA record?
- A. Authorization, Authentication and Auditing record
- B. Address database record
- C. IPv6 address resolution record
- D. Address prefix record
Answer: C
NEW QUESTION # 269
Eve is spending her day scanning the library computers. She notices that Alice is using a computer whose port
445 is active and listening. Eve uses the ENUM tool to enumerate Alice machine. From the command prompt, she types the following command.
What is Eve trying to do?
- A. Eve is trying to connect as a user with Administrator privileges
- B. Eve is trying to carry out a password crack for user Administrator
- C. Eve is trying to escalate privilege of the null user to that of Administrator
- D. Eve is trying to enumerate all users with Administrative privileges
Answer: B
NEW QUESTION # 270
infecting a system with malware and using phishing to gain credentials to a system or web application are examples of which phase of the ethical hacking methodology?
- A. Scanning
- B. Gaining access
- C. Reconnaissance
- D. Maintaining access
Answer: B
Explanation:
This phase having the hacker uses different techniques and tools to realize maximum data from the system.
they're -* Password cracking - Methods like Bruteforce, dictionary attack, rule-based attack, rainbow table are used. Bruteforce is trying all combinations of the password. Dictionary attack is trying an inventory of meaningful words until the password matches. Rainbow table takes the hash value of the password and compares with pre-computed hash values until a match is discovered.* Password attacks - Passive attacks like wire sniffing, replay attack. Active online attack like Trojans, keyloggers, hash injection, phishing. Offline attacks like pre-computed hash, distributed network and rainbow. Non electronic attack like shoulder surfing, social engineering and dumpster diving.
NEW QUESTION # 271
Your company, Encryptor Corp, is developing a new application that will handle highly sensitive user information. As a cybersecurity specialist, you want to ensure this data is securely stored. The development team proposes a method where data is hashed and then encrypted before storage. However, you want an added layer of security to verify the integrity of the data upon retrieval. Which of the following cryptographic concepts should you propose to the team?
- A. a digital signature mechanism.
- B. Switch to elliptic curve cryptography.
- C. Suggest using salt with hashing.
- D. Implement a block cipher mode of operation.
Answer: A
Explanation:
A digital signature mechanism is a cryptographic concept that you should propose to the team to verify the integrity of the data upon retrieval. A digital signature mechanism works as follows:
* A digital signature is a mathematical scheme that allows the sender of a message to sign the message with their private key, and allows the receiver of the message to verify the signature with the sender's public key. A digital signature provides two security services: authentication and non-repudiation. Authentication means that the receiver can confirm the identity of the sender, and non-repudiation means that the sender cannot deny sending the message12.
* A digital signature mechanism consists of three algorithms: key generation, signing, and verification.
Key generation produces a pair of keys: a private key for the sender and a public key for the receiver.
Signing takes the message and the private key as inputs, and outputs a signature. Verification takes the message, the signature, and the public key as inputs, and outputs a boolean value indicating whether the signature is valid or not12.
* A digital signature mechanism can be implemented using various cryptographic techniques, such as hash-based signatures, RSA signatures, or elliptic curve signatures. A common method is to use a hash function to compress the message into a fixed-length digest, and then use an asymmetric encryption algorithm to encrypt the digest with the private key. The encrypted digest is the signature, which can be decrypted with the public key and compared with the hash of the message to verify the integrity12.
A digital signature mechanism can ensure the integrity of the data upon retrieval, because:
* A digital signature is unique to the message and the sender, and it cannot be forged or altered by anyone else. If the message or the signature is modified in any way, the verification will fail and the receiver will know that the data is corrupted or tampered with12.
* A digital signature is independent of the encryption or hashing of the data, and it can be applied to any type of data, regardless of its format or size. The encryption or hashing of the data can provide confidentiality and efficiency, but they cannot provide integrity or authentication by themselves. A digital signature can complement the encryption or hashing of the data by providing an additional layer of security12.
The other options are not as suitable as option B for the following reasons:
* A. Implement a block cipher mode of operation: This option is not relevant because it does not address the integrity verification issue, but the encryption issue. A block cipher mode of operation is a method of applying a block cipher, which is a symmetric encryption algorithm that operates on fixed-length blocks of data, to a variable-length message. A block cipher mode of operation can provide different security properties, such as confidentiality, integrity, or authenticity, depending on the mode. However, a block cipher mode of operation cannot provide a digital signature, which is a form of asymmetric encryption that uses a pair of keys3 .
* C. Suggest using salt with hashing: This option is not sufficient because it does not provide a digital signature, but only a hash value. Salt is a random value that is added to the input of a hash function, which is a one-way function that maps any data to a fixed-length digest. Salt can enhance the security of hashing by making it harder to perform brute-force attacks or dictionary attacks, which are methods of finding the input that produces a given hash value. However, salt cannot provide a digital signature, which is a two-way function that uses a pair of keys to sign and verify a message .
* D. Switch to elliptic curve cryptography: This option is not specific because it does not specify a digital signature mechanism, but only a type of cryptography. Elliptic curve cryptography is a branch of cryptography that uses mathematical curves to generate keys and perform operations. Elliptic curve cryptography can be used to implement various cryptographic techniques, such as encryption, hashing, or digital signatures. However, elliptic curve cryptography is not a digital signature mechanism by itself, but rather a tool that can be used to create one .
References:
* 1: Digital signature - Wikipedia
* 2: Digital Signature: What It Is and How It Works | Kaspersky
* 3: Block cipher mode of operation - Wikipedia
* : Block Cipher Modes of Operation - an overview | ScienceDirect Topics
* : Salt (cryptography) - Wikipedia
* : What is Salt in Cryptography? | Cloudflare
* : Elliptic-curve cryptography - Wikipedia
* : Elliptic Curve Cryptography: What It Is and How It Works | Kaspersky
NEW QUESTION # 272
Which rootkit is characterized by its function of adding code and/or replacing some of the operating-system kernel code to obscure a backdoor on a system?
- A. Kernel-level rootkit
- B. Library-level rootkit
- C. Hypervisor-level rootkit
- D. User-mode rootkit
Answer: A
NEW QUESTION # 273
What is the file that determines the basic configuration (specifically activities, services, broadcast receivers, etc.) in an Android application?
- A. APK.info
- B. AndroidManifest.xml
- C. classes.dex
- D. resources.asrc
Answer: B
Explanation:
The AndroidManifest.xml file contains information of your package, including components of the appliance like activities, services, broadcast receivers, content providers etc. It performs another tasks also: * it's responsible to guard the appliance to access any protected parts by providing the permissions. * It also declares the android api that the appliance goes to use. * It lists the instrumentation classes. The instrumentation classes provides profiling and other informations. These informations are removed just before the appliance is published etc. This is the specified xml file for all the android application and located inside the basis directory.
NEW QUESTION # 274
Which of the following is the primary objective of a rootkit?
- A. It provides an undocumented opening in a program
- B. It opens a port to provide an unauthorized service
- C. It creates a buffer overflow
- D. It replaces legitimate programs
Answer: D
NEW QUESTION # 275
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