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#1 2015-01-15 08:52:15
- asper
- Contributor
- Registered: 2008-08-24
- Posts: 1,409
Get reader used key
If i snoop a communication between a reader and a card with invalid keys (invalid = not present in the reader) and I apply the reverse crypto algo am I able to obtain the key the reader attempted to use to authenticate?
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#2 2015-01-18 05:44:47
- J-Run
- Contributor
- Registered: 2014-11-13
- Posts: 24
Re: Get reader used key
Yes, you able 
But you need snoop log of at least 2 unsuccessful authentifications:
nonce_tag_1, nonce_reader_1, answer_reader_1, nonce_tag_2, nonce_reader_2, answer_reader_2
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#3 2015-01-18 12:18:41
- asper
- Contributor
- Registered: 2008-08-24
- Posts: 1,409
Re: Get reader used key
Thank u.
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