alfs wrote:
I have some questions regarding the mifare classic chip in neo:
- Is the chip/content resettable? For example if access keys are forgotten, or if the access bits are borked by mistake when writing?
No - this is a true security chip so there are no back doors.
Quote:
- a 7 byte UID is used, but it some readers (i.e. mine) only accepts 4 byte UID. Can this be configured?
On a per batch basis, but it will require a sensible size order. NXP (owner of the Mifare technology) strongly suggests all system to go for 7-byte UIDs so we have this configured by default.
Quote:
- Is the MFC a javacard application, or a real/separate chip?
It is a real EAL5+ smartcard chip featuring a Javacard / JCOP execution environment. It is integrated so the same features are available both in USB- and NFC modes.
Best regards,
JakobE
Hardware- and firmware guy @ Yubico
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