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Linux Kernel Module - Kernel Edited

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...
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Man In The Middle Attack - EavesDropping in the Digital World

    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...

Bluetooth - You are Connected

       We are entering the era of Internet of Things (IoT) devices, where each device connects remotely to one another, and the world wide web. This makes them smart in the way of integration to Artificial Intelligence, Machine learning and Data analysis. There are number of network protocols that facilitate this peer to peer communication be it ZigBee, Matter etc. More on that later.    What is Bluetooth  Invented  in 1994 by Ericsson and widely used, Bluetooth allows for short distance communication, within 10 meter radius. The data speed is between 1 Mbps and 3 Mbps. The bandwidth is in the range of 2.4 GHz to 2.485 GHz.   Frequency Hopping Unfold Spectrum This is the underlying tech used in Bluetooth. Data signals by default have low frequency, and high bandwidth. This makes them prone to distortion, affecting long distance transmission. Also the receiving antennas  have to be large in size which is a limitation for mobile phone...

Internet of Things-Connection Redefined

  Imagine driving home after a long day of work. En route the car instructs the residence to automatically turn on the lights, prepare a hot bath, and download the latest Netflix series. While this may seem like a line from a SciFi script, the future is more realistic than ever. Welcome to the world of IoT or Internet of Things. Though not as popular as its famous counterpart, Artificial Intelligence, its penetration into the consumer market is indeed extensive. What is IoT...... It is the term used to describe a   device, or set of devices which are connected to the internet,   and also communicate with each other. They can share data obtained from various sensors to a central hub, analyze it using  AI, and take appropriate actions. For example, a smart thermostat can read the room temperature, analyze the same, and adjust the heating system without any human intervention. Another example would be a smart camera which provides video footage when a movement is detect...

Windows vs Linux- Which is more secure

  The debate...   Windows or Linux, which is better. The debate has been going on for eons now. The die hard fans of each sing praise of their respective OS, but there needs to be an unbiased view to get a complete picture. The beginning Here Microsoft takes the lead with the entry  before the internet era. Comparitively, Linux is considered a new kid on the block. Windows is based on Windows NT kernel while Linux is based on Unix. Yes, the same kernel used on Mac. Coming to the core topic. Security is paramount in the   modern digital era given the rise of   cyber crime. Here   linux ups the game .   Here are   some features that   strengthens the same Open Source  Linux kernel is free, and anyone can download and make changes according to preferences. There are different versions available, popular being Ubuntu, Kubuntu, Fedora, Mint and Kali. The benefit is that multiple developers work on the same system to resolve bugs and zero day ...

Cyber Stalking - Unwanted Attention

With the advent of digital age, we are more connected than ever. Social media has transcended geographical locations, and no place is out of reach. But with this type of connectivity, there is a rise in the number of antisocial players. Cyber stalking cases has reportedly gone high in recent years.  Stalking is considered as any form of unwanted attention, contact or harassment directed towards an individual. This results in victim's personal space being encroached or taken for granted.  The preparator perform stalking through fake profiles, monitoring social media sites, messages or chat history. They initiate a volley of hate speech or try to tarnish their victim's reputation. Here stalking can be also a form of love addiction. An unrequited love can cause the stalker to perform the above steps as an act of revenge. Mode of Operation Installing a piece of code in the victim's computer for accessing the webcam. The spyware comes bundled with a software which could be do...

Microprocessor War - Intel Vs AMD

There is currently a clash between two main processors, Intel and AMD. Both do bring a fresh perspective, in their respective domains. So how can we choose a processor brand, based on our use priorities. Intel Stands for Integrated Electronics  and is credited for creating the first processor, Intel 8086. The family tree of the same is credited with higher performance, faster clock speed but, more power consumption AMD Stands for Advanced Micro Devices providing affordability and security. Though a late comer, AMD focused on budget friendly, low power consumption chips. What is Clock Speed A CPU is the brain of any computer and determines the rate at which complex operations are processed.  A chip consists of billions of transistors which are opened and closed n number of times during a cycle. This is a benchmark for speed, known simply as Clock Cycle .  The measuring unit is Hertz (Hz). 1 Hz equals to 1 cycle per second. For Example, a 3.2 GHz processor comple...