Articles Written by Apriorit Inc.

C++ Programming: Implementation of the Licensing System For a Software Product

This article is devoted to the development of the key licensing system for the applications. In the theoretical part of the article, we will examine the cryptography methods, which can be used while implementing the licensing system. Also we will discuss all pros and cons of these methods and select the possible ones for using in the application. In the practical part of the article, we will provide the implementation of the simplest licensing system, which guaranties the protection from cracking even if a hacker knows the source code of an algorithm.

Windows2Linux Porting

Recently I faced a very interesting task, I had to port an application from one platform (Windows) to another (Linux). This article is intended for everybody who wants to write a cross-platform application.

Easy way to set up global API hooks

Discover an easy way to set up system-wide global API hooks using AppInit_DLLs registry key for DLL injection and Mhook library for API hooking. To illustrate this technique we will show how to easily hide calc.exe from the list of running processes.

Forbidding the Clipboard for the specified process

Though the Clipboard is one of the fundamental parts of the Windows operating system, there is little information about how it works, especially in the low level. In this article, I'm going to tell you something about the Clipboard internals by showing how you can forbid access to it.

Writing UDFs for Firebird Embedded SQL Server

This article was written mainly for developers who use Firebird Embedded SQL Server in .Net framework applications and want to speed up or optimize DB queries. We will describe how to create your own native Firebird extension and show some approaches how to use it in managed code applications.

File System Filter Driver Tutorial

Discover how to develop a simple file system filter driver. The demo driver will print the names of opening files to debug output. The article requires basic windows driver and C/C++ knowledge. However it may be interesting to the people without windows driver experience.

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