White Box Technique

White Box Technique: An Overview 
White box testing is a security testing method that can be used to validate whether code implementation follows intended design, to validate implemented security functionality, and to uncover exploitable vulnerabilities. 

This article introduces white box testing for security, how to perform white box testing, and tools and techniques relevant to white box testing. It brings together concepts from two separate domains: traditional white box testing techniques and security testing. It assumes the reader to be familiar with general concepts of software security. Refer to other content areas on this portal to learn different aspects of software security.
This article will help security developers and testers understand white box testing for security and how to effectively use the approach, tools, and techniques applicable to white box testing.
The paper is organized into separate sections dealing with what white box testing is, how to perform white box testing, what results to expect, the business case to justify white box testing, skills and training required to perform white box testing, and a brief case study.