AJ Kumar

AJ Kumar is a Cyber security evangelist, has a great passion for open source programming, IT security, bug detection, penetration testing, and assembly language on diverse platforms including Windows and Linux. He can be reached via ajkumarhv[at]gmail[dot]com;

Articles from AJ Kumar

Reverse Engineering C++

September 10, 2019

Introduction C++ programming is popular among developers, owing to its advanced capabilities. Malware reverse engineering relies heavily on C++ to translate

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Canonicalization attack [updated 2019]

January 13, 2019

The term 'canonicalization' refers to the practice of transforming the essential data to its simplest canonical form during communication. For instance, the

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Patching by Reversing Binary

February 24, 2017

Abstract Software often distributed with vulnerabilities in production milieu either due to poor programming practice (often inadvertently) or may be owing t

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Network security policy

February 9, 2017

A security policy designates an organization's security controls, without specifying technologies, as well as offers high-level directives on acceptable and

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An Introduction to cybersecurity policy

January 24, 2017

Security policy Security policy is the statement of responsible decision makers about the protection mechanism of a company crucial physical and information

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Defeating integer overflow attack

November 21, 2016

Abstract This article unleashes memory overflow related security vulnerabilities, in particular, Integer Overflow (resided during source coding inadvertentl

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Reversing Binary: Spotting Bug without Source Code

September 27, 2016

Abstract The proficiency to unravel the complexities of a target software is called reverse engineering or just reversing. Software attackers manipulate or b

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ActiveX Security Model

September 16, 2016

Abstract Modern browsers act as a thin client by executing untrusted or portable code called Mobile Code. For example, windows media player too could be us

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Discovering entry points

September 6, 2016

When people secure real world physical objects for example bank premises, they first secure obvious entry points like entrance, doors, exists and much more w

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XML Secure Coding

December 4, 2015

ABSTRACT The XML (Extensible markup language) is a buzzword over the internet, rapidly maturing technology with powerful real world application, especially f

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Format String Bug Exploration

May 19, 2015

ABSTRACT The Format String vulnerability significantly introduced in year 2000 when remote hackers gain root access on host running FTP daemon which had anon

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Hardening IIS security

April 14, 2015

Security is an essential part of a web application and should be taken into consideration from the first stage of the development process. A website couldn't

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