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ECCouncil Certified Ethical Hacker Exam (CEHv13) Sample Questions (Q113-Q118):

NEW QUESTION # 113
As a cybersecurity analyst for SecureNet, you are performing a security assessment of a new mobile payment application. One of your primary concerns is the secure storage of customer data on the device. The application stores sensitive information such as credit card details and personal identification numbers (PINs) on the device. Which of the following measures would best ensure the security of this data?

A. Implement biometric authentication for app access.
B. Enable GPS tracking for all devices using the app.
C. Encrypt all sensitive data stored on the device.
D. Regularly update the app to the latest version.

Answer: C

Explanation:
Encrypting all sensitive data stored on the device is the best measure to ensure the security of this data, because it protects the data from unauthorized access or disclosure, even if the device is lost, stolen, or compromised. Encryption is a process of transforming data into an unreadable format using a secret key or algorithm. Only authorized parties who have the correct key or algorithm can decrypt and access the data.
Encryption can be applied to data at rest, such as files or databases, or data in transit, such as network traffic or messages. Encryption can prevent attackers from stealing or tampering with the customer data stored on the device, such as credit card details and PINs, which can cause financial or identity fraud.
The other options are not as effective or sufficient as encryption for securing the customer data stored on the device. Implementing biometric authentication for app access may provide an additional layer of security, but it does not protect the data from being accessed by other means, such as malware, physical access, or backup extraction. Enabling GPS tracking for all devices using the app may help locate the device in case of loss or theft, but it does not prevent the data from being accessed by unauthorized parties, and it may also pose privacy risks. Regularly updating the app to the latest version may help fix bugs or vulnerabilities, but it does not guarantee the security of the data, especially if the app does not use encryption or other security features.
References:
Securely Storing Data | Security.org
Data Storage Security: 5 Best Practices to Secure Your Data
M9: Insecure Data Storage | OWASP Foundation

NEW QUESTION # 114
John, a professional hacker, targeted CyberSol Inc., an MNC. He decided to discover the loT devices connected in the target network that are using default credentials and are vulnerable to various hijacking attacks. For this purpose, he used an automated tool to scan the target network for specific types of loT devices and detect whether they are using the default, factory-set credentials. What is the tool employed by John in the above scenario?

A. loTSeeker
B. loT Inspector
C. Azure loT Central
D. AT&T loT Platform

Answer: D

NEW QUESTION # 115
What is the known plaintext attack used against DES which gives the result that encrypting plaintext with one DES key followed by encrypting it with a second DES key is no more secure than using a single key?

A. Meet-in-the-middle attack
B. Replay attack
C. Man-in-the-middle attack
D. Traffic analysis attack

Answer: A

Explanation:
https://en.wikipedia.org/wiki/Meet-in-the-middle_attack
The meet-in-the-middle attack (MITM), a known plaintext attack, is a generic space-time tradeoff cryptographic attack against encryption schemes that rely on performing multiple encryption operations in sequence. The MITM attack is the primary reason why Double DES is not used and why a Triple DES key (168-bit) can be bruteforced by an attacker with 256 space and 2112 operations.
The intruder has to know some parts of plaintext and their ciphertexts. Using meet-in-the-middle attacks it is possible to break ciphers, which have two or more secret keys for multiple encryption using the same algorithm. For example, the 3DES cipher works in this way. Meet-in-the-middle attack was first presented by Diffie and Hellman for cryptanalysis of DES algorithm.

NEW QUESTION # 116
Your company, SecureTech Inc., is planning to transmit some sensitive data over an unsecured communication channel. As a cyber security expert, you decide to use symmetric key encryption to protect the data. However, you must also ensure the secure exchange of the symmetric key. Which of the following protocols would you recommend to the team to achieve this?

A. Utilizing SSH for secure remote logins to the servers.
B. Switching all data transmission to the HTTPS protocol.
C. Implementing SSL certificates on your company's web servers.
D. Applying the Diffie-Hellman protocol to exchange the symmetric key.

Answer: D

Explanation:
The protocol that you would recommend to the team to achieve the secure exchange of the symmetric key is the Diffie-Hellman protocol. The Diffie-Hellman protocol is a key agreement protocol that allows two or more parties to establish a shared secret key over an unsecured communication channel, without having to exchange the key itself. The Diffie-Hellman protocol works as follows12:
* The parties agree on a large prime number p and a generator g, which are public parameters that can be known by anyone.
* Each party chooses a random private number a or b, which are kept secret from anyone else.
* Each party computes a public value A or B, by raising g to the power of a or b modulo p, i.e., A = g