Article from the serie "CCID descriptor statistics"
The dwMaxIFSD field is a number value from the USB CCID descriptor: Indicates the maximum IFSD supported by CCID for protocol T=1.
Some values may look strange or bogus:
The dwMaxIFSD field is a number value from the USB CCID descriptor: Indicates the maximum IFSD supported by CCID for protocol T=1.
| dwMaxIFSD | # | % |
|---|---|---|
| 254 | 176 | 69.29 % |
| 252 | 34 | 13.39 % |
| 247 | 16 | 6.30 % |
| 0 | 12 | 4.72 % |
| 1024 | 4 | 1.57 % |
| 256 | 3 | 1.18 % |
| 1400 | 2 | 0.79 % |
| 1041 | 1 | 0.39 % |
| 123 | 1 | 0.39 % |
| 2048 | 1 | 0.39 % |
| 240 | 1 | 0.39 % |
| 248 | 1 | 0.39 % |
| 49 | 1 | 0.39 % |
| 64 | 1 | 0.39 % |
Some values may look strange or bogus:
- 0 is used by 5% of readers. It is not a bug for a ICCD device with a T=0 card inside because dwMaxIFSD is only used with a T=1 card.
Readers with dwMaxIFSD = 0 are:- ATMEL AT91SC192192CT-USB ICCD reader
- ATMEL AT98SC032CT-USB
- ATMEL VaultIC420 Smart Object
- ATMEL VaultIC440
- ATMEL VaultIC460
- Gemalto Hybrid Smartcard Reader
- IID AT90S064 CCID READER
- INSIDE Secure VaultIC 405 Smart Object
- INSIDE Secure VaultIC 441 Smart Object
- Inside Secure VaultIC 420 Smart Object
- Inside Secure VaultIC 440 Smart Object
- Inside Secure VaultIC 460 Smart Object
- MYSMART MySMART PAD V2.0
- SchlumbergerSema SchlumbergerSema Cyberflex Access
- SecuTech SecuTech Token
- TianYu CCID Key TianYu CCID SmartKey
- The maximum value for dwMaxIFSD is dwMaxCCIDMessageLength - 10.
Readers with dwMaxIFSD > dwMaxCCIDMessageLength - 10, so bogus readers, are:- Aktiv Co., ProgramPark Rutoken Magistra
- CCB eSafeLD
- Feitian bR301
- Free Software Initiative of Japan Gnuk
- Gemalto PDT
- Giesecke & Devrient GmbH Star Sign Card Token 550 (ICCD)
- OCS ID-One Cosmo Card USB Smart Chip Device
- Philips Semiconductors JCOP41V221
- Philips Semiconductors SmartMX Sample
- Planeta RC700-NFC CCID
- Yubico Yubikey NEO CCID
- Yubico Yubikey NEO OTP+CCID
This is dummy text. It is not meant to be read. Accordingly, it is difficult to figure out when to end it. But then, this is dummy text. It is not meant to be read. Period.
ConversionConversion EmoticonEmoticon