Each CID_ is followed by a 128-bit value formatted as a 32-character hexadecimal string, often displayed in the standard GUID format. The ID that is the subject of this guide is:
Keywords: scfilter, cid87d25e32ac0d4ef0b1e0502c6b7dfb77, scfilter.sys, SCFILTER\CID, smart card PnP class filter driver, Windows smart card driver, smart card hardware ID, Microsoft scfilter driver. scfilter cid87d25e32ac0d4ef0b1e0502c6b7dfb77
Device installation in Windows relies on matching hardware IDs and compatible IDs. A compatible ID is a broader identifier that allows a single driver to support multiple related devices. In the case of the Belgium eID card, the hardware ID may be SCFILTER\CID_a503010101ad1311 , but the compatible ID includes the longer GUID mentioned above. This layered identification strategy ensures that genuine devices can be correctly recognized even if their exact identifiers are not hardcoded into every driver package. Each CID_ is followed by a 128-bit value
I don't have context for what this string represents (it looks like a system-generated identifier). Below are concise, actionable possibilities and recommended next steps to identify and handle it. A compatible ID is a broader identifier that
The second part of the string, cid87d25e32ac0d4ef0b1e0502c6b7dfb77 , is a . This unique alphanumeric code is derived from the card's Answer to Reset (ATR) string, which is a sequence of bytes transmitted by a smart card when it is powered on or reset. By hashing or processing these bytes, Windows generates a specific CID to distinguish one type of smart card from another, allowing the system to seek out exact driver matches from the Windows Update site . Security and Plug and Play Integration