SCFILTER?

What is SCFILTER.SYS in Win-7? It appears to be an upper filter for
kernel-mode smart card drivers, and it would be nice to know what it does
since I (and many of my customers) are upgrading our drivers. I’ve already
observed that it creates PDOs and responds to QUERY_DEVICE_RELATIONS, but I
haven’t looked any further just yet.

Walter Oney
Consulting and Training
www.oneysoft.com

It creates a child stack based on the smart card itself. By giving the sc an identity, you can then download a cred provider via WU or an inbox inf on demand so that you can start talking to the card

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Sent from my phone with no t9, all spilling mistakes are not intentional.

-----Original Message-----
From: Walter Oney
Sent: Wednesday, May 06, 2009 7:30 AM
To: Windows System Software Devs Interest List
Subject: [ntdev] SCFILTER?

What is SCFILTER.SYS in Win-7? It appears to be an upper filter for
kernel-mode smart card drivers, and it would be nice to know what it does
since I (and many of my customers) are upgrading our drivers. I’ve already
observed that it creates PDOs and responds to QUERY_DEVICE_RELATIONS, but I
haven’t looked any further just yet.

Walter Oney
Consulting and Training
www.oneysoft.com


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