Security and Privacy on the U3 Platform

Be Smart with U3

What does Subsembly provide?

The Smart Card Subsembly is available in several flavors to cater to the varied needs of developers. These are offered as SDKs that include extensive documentation and many sample applications with commented source code. It even offers a royalty free distribution of the binary Smart Card Subsembly with your product and free email support.
From a developers point of view the advantages of Subsembly can be enumerated as below:
  1. Reduced development time by eliminating the need to write your own P//Invoke wrappers.
  2. Using an OpenCard like High Level and more convenient API.
  3. Make your applications quite robust by not relying on the underlying actual Smart Card API’s in such a way that the same application can use a PC/SC Smart Card reader and a CT-API reader without any changes.
  4. Enhancements, Updates and Bug fixes with continuous development.
Furthermore, it takes advantage of the .NET framework to the max by having a complete implementation in the .NET Common Language Specification (CLS). Additionally, it supports C#, VB .NET, J# and all the CLS-compliant IL-oriented languages.

It also recognizes the PC/SC workgroup API compatible Smart Card Readers with support for T= 0 and T= 1 protocol. As I’ve mentioned earlier, it has built-in support for the CT-API compatible Smart Card readers. Recently, support for the ACR80 and MCARD specific cards has also been added by extending the Subsembly. That is what’s magical about the Subsembly: it allows you to extend it to any new card reader type. It even allows you to use any number of configured readers in parallel.

We can be grateful to the author Andreas Selle, or the .NET development team, or both, for providing the support for localization in the entire GUI stuff that Subsembly provides.

Oh, I forgot to mention about the GUI! Yes, it provides convenient customizable GUI elements for prompting the user, PIN verification and PIN modification. And if you’re using an older version of the .NET framework, it’s still not a problem, because Subsembly supports v1.0 and v1.1 and probably v2.0 of the .NET framework.

So what do we talk about next 🙂

-The Editor (


October 27, 2006 - Posted by | Subsembly


  1. nice article man

    Comment by Reservoir Simulation | October 27, 2006

  2. nice article

    Comment by Pavon | October 27, 2006

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