Yubico Forum

...visit our web-store at store.yubico.com
It is currently Tue Jan 30, 2018 6:11 pm

All times are UTC + 1 hour




Post new topic Reply to topic  [ 2 posts ] 
Author Message
PostPosted: Fri Apr 19, 2013 10:19 am 
Offline

Joined: Fri Apr 19, 2013 9:33 am
Posts: 1
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?

- a 7 byte UID is used, but it some readers (i.e. mine) only accepts 4 byte UID. Can this be configured?

- Is the MFC a javacard application, or a real/separate chip?


Top
 Profile  
Reply with quote  

Share On:

Share on Facebook FacebookShare on Twitter TwitterShare on Tumblr TumblrShare on Google+ Google+

PostPosted: Wed Apr 24, 2013 3:13 am 
Offline
Site Admin
Site Admin

Joined: Wed May 28, 2008 7:04 pm
Posts: 263
Location: Yubico base camp in Sweden - Now in Palo Alto
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


Top
 Profile  
Reply with quote  
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 2 posts ] 

All times are UTC + 1 hour


Who is online

Users browsing this forum: No registered users and 13 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group