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AMD Fusion - Accelerated Processing Unit (APU), New Era in Computing
This is known to all that AMD is the only one competitor of Intel.s market. In this .Dual-Core. era of CPU.s AMD is going to launch their APU or Accelerated Processing Unit in this year. Not only AMD Intel is also working with this architecture and hopefully they will also release their new...
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Sockets in C Tutorials
What is a socket?
See there are many types of sockets hardware sockets .like electrical sockets. etc. and software .programming sockets. like what i'm going to talk about from now onwards.
See , a socket can be thought like any standard way to perform network communication through our system...
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Bash Simple Tricks Tutorial
In this tutorial of mine I am demonstrating some bash commands with some example scenarios/questions and their solutions....
What is Bash:-
Bash or Bourne Again Shell is a reimplementation of Bourne shell...
Bash is the default shell that comes with most of the linux distributions out...
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Running Windows Programs Under Linux
In this tutorial of mine i am demonstrating how to Run windows programs in linux ....
In my case i am using Ubuntu 10.10 with Kernel 2.6
I am using Wine to demonstrate my article..
Wine is a program that provides the windows API for running the windows programs .
...
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An Introduction to Cryptography
Cryptography is "Art of writing or hiding secret". It is a science of protecting the information from theft or unauthorized access. To do so, important or confidential information is hided as or converted to some other form of gibberish data. Now original information can be recovered only by the...
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Understanding Symmetric-Key encryption
The article extends the Cryptography concepts to explain the Symmetric Key encryption. Additionally, it throws light on the capabilities of Symmetric key encryption and its operational modes.
Symmetric-Key encryption
Symmetric key cryptography is encrypting or decrypting message using a...
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Data Encryption Standard (DES) Algorithm
The article continues the discussion on Algorithms available in Symmetric Key cryptography. It explains the whereabouts of DES algorithm. Due to the limitations of DES on security context, we shall include Triple DES in the scope. Triple DES is a stronger form of DES algorithm.
Understanding...
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Instantly Submit HTML Form Using IFrame and JavaScript
Have you ever wondered when you see form on some website submitted in a fraction of a second? Have you ever wanted such forms on your site?
This is it.
Let us take a sample form.
HTML:
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Fraction math functions
This script adds some basic math functions to php allowing you to get percentages, ratios and other fraction based functions.
Background
I created this because I had a need for some math functions that php does not provide. I also made them for my math class to save on time from having to do...
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What are Torrents and How they Work ?
What are torrent
*Torrents*
Torrents are P2P(Peer to Peer) software compatible files they are used to share files in P2P network environments. For running torrents you need to install a specialised P2P software.
Torrents use a Protocols for transfer of files The Bit-Torrent protocol...
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Introduction to Bouncy Castle APIs
The Bouncy Castle Crypto APIs is a set of implementations of cryptographic concepts and algorithms. Bouncy Castle APIs are developed in both Java and C#. These APIs can be freely downloaded from the Bouncy Castle home page.
Let us have a glance at some of the important type of implementations...
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Understanding Public Key Infrastructure
Public Key Infrastructure
Public key infrastructure is an architecture which supports mechanisms like integrity and confidentiality. It is heavily used in e-commerce, where business transactions are frequent and should be much secured. In fact business transaction starts only after the two...
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Understanding Advanced Encryption Standard
Advanced Encryption Standard is a block cipher symmetric encryption algorithm. It is preferred to protect network communications, personal data etc using AES over DES. It encrypts or decrypts the data through several rounds.
Categorization
It is categorized under three types of key sizes ....
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How to get started with GNU Project Debugger [GDB]?
GDB is GNU Project Debugger its basically is a debugger and allows you to see inside the program flow, control structure, working, code and we will see how we can do that.
How to work with GDB
We will we using a basic debugMe.c program throughout this tutorial
helloworld.c
Code:...
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Getting Started With Virtual machines
Virtual machine(VM) as the name suggests is a software implementation of a programmable machine running inside another machine i.e an OS running inside another OS e.g. Linux running inside Windows. The Host machine on which the Virtual Machine Monitor/Software runs is called the Host Machine or...
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How to get started with Metasploit
Metasploit is a Hacking Framework consisting of tools , exploits , Knowledge etc etc...Its a Boon to pen-testers , exploit developers and Hackers ...
This Project was started by H.D Moore and is now open source project managed by Rapid7 (http://www.rapid7.com/)
For Downloading and installing...
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8 More Reasons to be Using Linux Instead of Windows
Let me share with you 8 More Reasons why you should be Using Linux Instead of Windows.
*1. Free and Open Source Software *
Linux is free and open source software which means you can redistribute, change, modify the code or the whole system and no one is going to ask you "Why you have done...
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What is Operating System, Kernel and Types of kernels
1. What Is Kernel?
A kernel is a central component of an operating system. It acts as an interface between the user applications and the hardware. The sole aim of the kernel is to manage the communication between the software (user level applications) and the hardware (CPU, disk memory etc). The...
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How to Get CPU Vendor String, Using x86 Assembly Instruction
In this article I am going to demonstrate a basic use of low-level language to demonstrate how you can get your CPU Vendor string, and other hardware information using x86 assembly coding
Code:
---------
section .data
string db "The Vendor id string is 'XXXXXXXXXXXX'",0xA
section...
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Stack Implement in C using arrays
Stack is a LIFO[Last in first out] abstract type of data structure. The stack is mainly associated with 2 types of functions Push() and Pop(). Push() adds an item on the top of the stack and Pop() removes an item from the top of the stack.
Implementation of Stack
stack.c
Code:
...
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Why Stack Overflows Can Be Dangerous?
Stack is a Last in First out(LIFO) abstract data structure...Stack is used as the main data structure for processing and data management on most of the OS architectures...like intel x86 etc etc..
Stack based Overflows
It happens when to much data is passed on the call stack and results in...
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How HTTP Works?
HTTP is an abbreviated form of Hyper Text Transfer Protocol..As we all know HTTP set the foundations for internet and WWW [world wide web]...I'll not go in much detail of its history, but I'll get straight to the topic of
How HTTP works
HTTP is a request response protocol to communicate...
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Memory addressing and segmentation in Linux
Lets try and understand the memory addressing system and segmentation in Linux [Note: This article is written keeping in mind 8086 microprocessor].
1. Memory Addresses
There are three types of addresses :
1. *Logical addresses :* Logical addresses are included in the machine language...
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How FTP Works With Example
FTP is a abbreviation of File Transfer Protocol , it is the main net work protocol used for downloading/uploading of files...From one host to another using a TCP based network like INTERNET.. FTP works on a principle of client-server model and uses data-connection between client and server..FTP...
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How to get source of a Web Page in C
*Note : The following source will only work with non-chunked encoding servers...The servers which have enabled the encoding set to chunked will not properly work with this source...
And I assume basic knowledge of SOCKETS UNIX API and C language as prerequisites...*
Source
Code:...
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How SSH works? Examples and Samples
SSH is a abbreviation for Secure Shell is a network protocol that allows data-exchange between devices on the network..This is mainly used in linux OS's to access shell accounts , shell commands etc... SSH was mainly designed as a replacement modification to telnet etc..other insecure remote shells...
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Basics of How SMTP Works
SMTP stands for Simple Mail Transfer Protocol as the name suggest it is basically used for emails.. SMTP specified for outgoing mail uses and default sits on TCP Port 25..(Uses 587 in new versions) Electronic mail servers uses SMTP for send and receive emails while the User Client interface only...
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Bouncy Castle - .Net Implementation . Triple DES Algorithm
In this article, we will go through a simple example to demonstrate Encryption and Decryption techniques using Triple DES algorithms. We will use Bouncy Castle APIs for performing below steps.
Encryption steps -...
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Digital Certificates and Smart Cards
Digital certificates are files which are used to prove the authenticity of the user or computer to whom it is issued. It is very similar to an identification proof like passport, driving license or PAN, which gives assurance to the other party that the transaction of information from the...
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Digital Certificate formats and filename extensions
In this article, we will learn about the available formats of Digital certificate, their purpose and some of the technical commands used for requesting and issuing the certificates.
We shall use *OpenSSL*, which is an open source toolkit for performing cryptographic operations
...
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How Proxy Works?
In a network of computers, a Proxy (or a Proxy server) acts as an inter-mediator for relaying of requests from set of clients seeking resources from other set of servers. A Proxy generally while acting on the requests may filter the data based on specific requirement of the Proxy. Most web based...
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Understanding Format Strings and Their Vulnerbilities
Format strings are the strings mainly associated with printf's set of instructions (like printf,fprintf etc..) which basically stands for print format.... These functions accept several arguments and put them on the stack..and as a format specifier is noted in the string the function pops the data...
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How to make a simple shellcode (The basics)
Shell-code is a piece of object codes that can be injected into the executable stack to get the execution access...Shell-code is so called because it is basically used to get a shell (/bin/bash).. We'll see how make a simple exit shell-code...
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CUBE function in SQL Server
CUBE generates a result set that represents aggregates for all combinations of values in the selected columns. CUBE automatically generates a summation rollup to the top level of a GROUP BY.
Lets us look one Example.
...
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