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C0Y0-Ck3r

Contributor

Registered: 2012-11-08

Posts: 87

Mifare security

Hey, Have a question even if there is no one to respond each time, but I'm creating a topic to help myself and maybe help others that would face the same problem. If there is someone to help, don't hesitate, and if I find the answer of my question I'll put it here.
Well, what I wanted to do is creating a secured mifare card (I have a blank one) so it possible to do ? what I did untill now is changing all the keys with a random ones so now when reading with the chk command I got this :

proxmark3> hf mf chk *1 ? t
No key specified,try default keys
chk default key[0] ffffffffffff
chk default key[1] 000000000000
chk default key[2] a0a1a2a3a4a5
chk default key[3] b0b1b2b3b4b5
chk default key[4] aabbccddeeff
chk default key[5] 4d3a99c351dd
chk default key[6] 1a982c7e459a
chk default key[7] d3f7d3f7d3f7
chk default key[8] 714c5c886e97
chk default key[9] 587ee5f9350f
chk default key[10] a0478cc39091
chk default key[11] 533cb6c723f6
chk default key[12] 8fd0a4f256e9
--SectorsCnt:0 block no:0x03 key type:A key count:13
--SectorsCnt:1 block no:0x07 key type:A key count:13
--SectorsCnt:2 block no:0x0b key type:A key count:13
--SectorsCnt:3 block no:0x0f key type:A key count:13
--SectorsCnt:4 block no:0x13 key type:A key count:13
--SectorsCnt:5 block no:0x17 key type:A key count:13
--SectorsCnt:6 block no:0x1b key type:A key count:13
--SectorsCnt:7 block no:0x1f key type:A key count:13
--SectorsCnt:8 block no:0x23 key type:A key count:13
--SectorsCnt:9 block no:0x27 key type:A key count:13
--SectorsCnt:10 block no:0x2b key type:A key count:13
--SectorsCnt:11 block no:0x2f key type:A key count:13
--SectorsCnt:12 block no:0x33 key type:A key count:13
--SectorsCnt:13 block no:0x37 key type:A key count:13
--SectorsCnt:14 block no:0x3b key type:A key count:13
--SectorsCnt:15 block no:0x3f key type:A key count:13
--SectorsCnt:0 block no:0x03 key type:B key count:13
--SectorsCnt:1 block no:0x07 key type:B key count:13
--SectorsCnt:2 block no:0x0b key type:B key count:13
--SectorsCnt:3 block no:0x0f key type:B key count:13
--SectorsCnt:4 block no:0x13 key type:B key count:13
--SectorsCnt:5 block no:0x17 key type:B key count:13
--SectorsCnt:6 block no:0x1b key type:B key count:13
--SectorsCnt:7 block no:0x1f key type:B key count:13
--SectorsCnt:8 block no:0x23 key type:B key count:13
--SectorsCnt:9 block no:0x27 key type:B key count:13
--SectorsCnt:10 block no:0x2b key type:B key count:13
--SectorsCnt:11 block no:0x2f key type:B key count:13
--SectorsCnt:12 block no:0x33 key type:B key count:13
--SectorsCnt:13 block no:0x37 key type:B key count:13
--SectorsCnt:14 block no:0x3b key type:B key count:13
--SectorsCnt:15 block no:0x3f key type:B key count:13

so does it mean that the blocks are secured and I can read and write whatever I want using the random keys I put ?

C0Y0-Ck3r

Contributor

Registered: 2012-11-08

Posts: 87

Re: Mifare security

I'm back
Well, after some rsearch, the mifare card can be attacked with 2 different attacks. Well here we can say that we just patched one vulnerability that is exploited by nested attack. But the bruteforce one still useful using the darkside attack. Hope I helped someone.