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MSDN | Security Developer Center

Get the Microsoft Security Development Lifecycle toolset – it’s free
Download the templates and tools made available at no cost by Microsoft to help you automate SDL practices.
Microsoft's Security Talk Series: Discusses the latest in security & privacy
Join the discussion with a diverse group of leading security and privacy experts in this informative series of webcasts. These discussions help you gain insight and prescriptive guidance on a variety ... more
Write more secure code with the Microsoft Security Development Lifecycle (SDL)
Download the Simplified Implementation of the Microsoft SDL to learn about the software development security activities you should perform in order to improve the security of your code.
Announcing WIF support for Windows Server 2003
Windows Identity Foundation (WIF) RTW for Windows Server 2003 is available NOW! This release supports both Windows Server 2003 SP2 and Windows Server 2003 R2 platforms and following seven languages: E... more
Download Windows Identity Foundation Today
Windows Identity Foundation helps simplify user access for developers by externalizing user access from applications via claims and reducing development effort with pre-built security logic and integr... more

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SDL Team Blog RSS Feed

A Microsoft-wide initiative and a mandatory policy since 2004, the Security Development Lifecycle (SDL) introduces security and privacy early and throughout the development process. Combining a holistic and practical approach, the SDL is risk-based with the goal of protecting end-users by reducing the number and severity of vulnerabilities in code.

Identity Management Team Blog RSS Feed

Windows Identity Foundation enables .NET developers to externalize identity logic from their application, improving developer productivity, enhancing application security, and enabling interoperability. Enjoy greater productivity, applying the same tools and programming model to build on-premises software as well as cloud services.

MSDN Magazine: Focus on Security RSS Feed

Read in-depth security articles from the authors of MSDN Magazine.

MSDN | Security Developer Center

ASP.NET Web API: CORS Support in ASP.NET Web API 2
The long-requested support for cross-origin resource sharing (CORS) is now built into ASP.NET Web API 2. Brock Allen, the original developer of the CO... more
ASP.NET: Enabling and Customizing ASP.NET Web API Services Security
If you’re calling Web API service from secured ASP.NET pages, you probably have all the security you need. But if you want to extend Web API’s securit... more
Cutting Edge: Social Authentication in ASP.NET MVC 4
ASP.NET MVC 4 now includes an ad hoc framework to authenticate users via a number of social networks, and Dino Esposito shows you how.Dino EspositoMSD... more

Security Updates

MSDN | Security Developer Center

Featured Downloads

Download AD FS 2.0

AD FS 2.0 is a security token service for IT that issues and transforms claims and other tokens, manages user access and enables federation and access management for simplified single sign-on.

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Application Security Tip of the Week

MSDN | Security Developer Center

Use Simple Error Messages
What to Do Show simple error messages that don't contain too much information. Write detailed inform... more

More Tips...

Application and Cyber Security Blog RSS Feed

Read up on software engineering, cybersecurity, and application risk management as offered by Security Innovation

MSDN | Security Developer Center

Sony CISO Reporting to Executive Management. Maybe Cyber Security Czar will follow suit? my previous ... more
Why responsible disclosure is the best choice for Security Innovation is a wide range of ways to... more
Sony appoints CISO in response to PlayStation attacks……but reports to the CIO????? few months ago, Sony an... more

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Code Gallery

Download or share sample applications or code snippets.

CodePlex CodePlex

Microsoft's open source project-hosting site.

Channel 9 Security Content on Channel 9

Watch videos and connect with your peers – it's all about the conversation.


Explore the projects that we are experimenting with in our labs, and let us know if they inspire you.

patterns & practices

Use Microsoft's proven practices for software engineering.