PKI and Cryptographic Applications

Student 1 YKA

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A cryptographic attack is a mathematical attack designed to defeat cryptographic algorithms. An advantage of the classical cryptographic model is that it provides a secure and non-repudiation mechanism for communicating information. Thus, the cryptographic model is a model of trusted and semi-trustworthy information systems. However, the classical model provides only reliable and non-reputable information systems. The cryptographic attack is a method used to obtain a value that is the same as the password but is much more difficult to remember (Lisovets et al., 2021). Ciphertext attacks are performed by guessing the ciphertext and attempting to encrypt it using a program they can be confident that the user is familiar with. Cipher attacks are usually successful because the software will try all possible cipher combinations. However, it is tough for the system to decipher if the user does not know the ciphertext. The most common software designed to accomplish this task is a key logger. The key logger is usually a program that records keystrokes at a constant pace and records details of the action taken by the user. A cryptographic attack is a mathematical attack. The goal of the attack is to hide the actual password from the attacker. They can compromise the network by concealing a private key to encrypt the entire password file. The best defense against password hiding techniques is to change the password or create a new one each time the current one is changed (Lisovets et al., 2021).

Brute force attacks:

Bruteforce attacks are a variant of brute force, whereby one or more computers attempt to perform a string of logical operations against a target in a series of steps. The main differences between the approaches are the amount of information involved and the number of possible results (Wichmann et al., 2021). The main advantage of a brute force attack is the ability to capture large amounts of data. A brute force attack will almost always result in the same outcome: A compromise or compromise by another system. Although a brute force attack may effectively catch an intruder, a targeted attack will usually miss the intended target. Instead, the target will likely have some defense mechanisms such as a password, which may need to begin access to the target.

To protect against Brute force attacks:

Monitor the Server Logs:

If the log files on their Server appear to have been tampered with or corrupted, the next best thing is to perform an in-depth forensic examination to determine what has happened to the files and what actions have been taken about the files and data. The next step is to contact the affected customers, request that they return the data to the affected servers, and let them know that such activity is unacceptable. No data or files will be created on those servers (Wichmann et al., 2021). If the affected customers do not return the data to their server vendors, they risk losing the data and losing business with that company. The same applies to customers who fail to act promptly.

Reference:

Lisovets, O., Knichel, D., Moos, T., & Moradi, A. (2021). Let us take it offline: Boosting brute-force attacks on iPhone’s user authentication through SCA. IACR Transactions on Cryptographic Hardware and Embedded Systems, 496-519.

Wichmann, P., Marx, M., Federrath, H., & Fischer, M. (2021). Detection of Brute-Force Attacks in End-to-End Encrypted Network Traffic. In The 16th International Conference on Availability, Reliability and Security, 1-9.

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Student 2 JK

The cryptographic attack is not possible to exploit. Even though an attacker does not know the operating system’s vulnerability, they can compromise many of the systems that are currently installed on systems. In some cases, the attacker may get into a privileged kernel mode and gain root access to a system. As stated previously, a kernel vulnerability is an error in the device driver that allows the operating system to be compromised. The kernel is the computer system program that runs the computer. The Linux kernel is used by a single system where each process runs as a separate program (Ito et al., 2021). The cryptographic attack is a single data modification or change that compromises the integrity of the authentication mechanism. For example, malicious code that compromises the integrity of a Windows authentication mechanism could modify the cryptographic algorithms used by the authentication process so that an attacker can compromise the Windows authentication process. Such changes could lead to theft of user credentials or unauthorized access of data in the user’s directory (Ito et al., 2021).

A side-channel attack is a technique used to breach remote physical access devices by exploiting a vulnerability in the authentication process used to access the physical device. The vulnerability, exploited in the operating system, allows a physical attacker to gain physical access to the host using a port knocking attack or a port spoofing attack. When an attacker intercepts a port knocking or a port spoofing port knocking session, she can cause a denial-of-service attack and cause the target to crash or render service to other applications (Ito et al., 2021). A side-channel attack is a buffer overflow that causes some input to be sent to a remote address. Buffer overflows are used to transmit data that would overload network segments, corrupt data, or otherwise cause a network segment fault. Buffer overflows can also be used to modify the program header of an executable file. This attack involves making changes to executable code to get around security measures. Buffer overflow is a technique used to read entire blocks of data from a buffer (Ito et al., 2021).

To protect against Side-channel attacks is the use of a combination of firewall rules and anti-malware software. As already mentioned, malware that resides on the network and communicates with their machines can be dangerous (Zaid et al., 2021). The fact that it resides on their networks means that it has a much higher chance of causing harm than a common virus that resides on the same host. To protect their computers from malware on the networks is not as complicated as one might think. A properly cond firewall prevents all malware traffic.

Reference:

Ito, A., Saito, K., Ueno, R., & Homma, N. (2021). Imbalanced Data Problems in Deep Learning-Based Side-Channel Attacks: Analysis and Solution. IEEE Transactions on Information Forensics and Security, 16, 3790-3802.

Zaid, G., Bossuet, L., Habrard, A., & Venelli, A. (2021). Efficiency through Diversity in Ensemble Models applied to Side-Channel Attacks. IACR Transactions on Cryptographic Hardware and Embedded Systems, 60-96.