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Messy, a network defender, was hired to secure an organization's internal network. He deployed an IDS in which the detection process depends on observing and comparing the observed events with the normal behavior and then detecting any deviation from it.
Identify the type of IDS employed by Messy in the above scenario.
Anomaly-based IDS is a type of IDS that detects intrusions by comparing the observed network events with a baseline of normal behavior and identifying any deviation from it. Anomaly-based IDS can detect unknown or zero-day attacks that do not match any known signature, but they can also generate false positives due to legitimate changes in network behavior. Anomaly-based IDS can use various techniques to model the normal behavior, such as statistical analysis, machine learning, or artificial intelligence. Anomaly-based IDS is the type of IDS employed by Messy in the above scenario, as he deployed an IDS that depends on observing and comparing the observed events with the normal behavior and then detecting any deviation from it. Reference:
Anomaly-Based Intrusion Detection System - Chapter 2: Anomaly-Based Intrusion Detection System
Network Defense Essentials (NDE) | Coursera - Week 10: Intrusion Detection and Prevention Systems
In an organization, employees are restricted from using their own storage devices, and only the company's portable storage devices are allowed. As employees are carrying the company's portable device outside their premises, the data should be protected from unauthorized access.
Which of the following techniques can be used to protect the data in a portable storage device?
John has recently joined an organization and completed his security training. The organization conducted a security campaign on their employees by sending a fake email stating the urgency of password reset. John identified that it was an illegitimate mail and reported it as spam.
Identify the type of attack initiated by the organization as part of the security campaign discussed in the above scenario.
Kevin, a security team member, was instructed to share a policy document with the employees. As it was supposed to be shared within the network, he used a simple algorithm to encrypt the document that just rearranges the same characters to produce the ciphertext.
Identify the type of cipher employed by Kevin in the above scenario.
A transposition cipher is a type of cipher that encrypts a document by rearranging the same characters to produce the ciphertext. A transposition cipher does not change the identity or frequency of the characters, but only their position. A transposition cipher can use various methods to permute the characters, such as writing them in a grid and reading them in a different order, or shifting them along a rail fence pattern. A transposition cipher is a simple and fast algorithm, but it can be easily broken by frequency analysis or anagramming. A transposition cipher is the type of cipher employed by Kevin in the above scenario, as he used a simple algorithm to encrypt the document that just rearranges the same characters to produce the ciphertext. Reference:
Transposition cipher - Wikipedia
Network Security: Transposition Cipher Techniques - Coding Streets
Network Defense Essentials (NDE) | Coursera - Module 4: Cryptography Techniques
Columnar Transposition Cipher - GeeksforGeeks
A major fire broke out in the storeroom of CyberSol Inc. It first gutted the equipment in the storeroom and then started spreading to other areas in the company. The officials of the company informed the fire department. The fire rescue team reached the premises and used a distribution piping system to suppress the fire, thereby preventing any human or asset loss.
Identify the type of fire-fighting system used by the rescue team in the above scenario.
