Linux kernels are monolithic by nature. They have a set of drivers already preinstalled on dispatch. However there can be new devices such as a WiFi Adapter or Bluetooth Speaker which cannot be paired to the operating system. Now we have two solutions for this. Either start from scratch, edit and compile the entire kernel. This can be time consuming as even a high configuration system can take 15 to 18 minutes just to debug. For a business this is not viable, unless paid by the hour. The other is to write a specific module (driver) which can be inserted into the kernel, during runtime. The whole process will take less than 5 minutes. This module is known as Linux Kernel Modules or LKM. Uses LKM are used for creating new device drivers or file systems and network packet tracking. The latter is particularly useful in developing firewalls, Intrusion detection system (IDS) or Intrusion prevention system (IPS). Prerequisite To create a module, we need to...
This is a term used to describe a cyber attack where a hacker acts as middleman, during data transfer between user and an application. The app can be a financial or an E commerce website, Software as a Service (SaaS) etc. The hacker can intercept data passed via the browser to the website, and collect sensitive information such as account and credit card details, user login etc. To put it into context, it is like a postman who reads all the letters addressed to you, then reseals the same, on delivery. This way no one suspects a foul play. Interception This is the first phase of the attack. Here the hacker establishes a connection with the target device whether a PC, Laptop or Smart phone. This is done through various methods like Free WiFi : Here a WiFi hot spot is set up which is not password protected. When a user logs in to the network, they are in essence connecting to the hacker's system. Now any data transfer occurs via this co...