Topic: someone pls help me to decrypt it....

hi....currently im studying a algorithm  that encrypt a UID to a key(sector 0 key A)......below is the example...i got no idea what encryption they implement in it....i got all this keys using MFCUK....thanks to the author of the tool..hope u guys can help me out on this...i got more than 20 sample with me.all the sector 0 keys are different.

25 36 ba 28(UID) = b5 44 3a 0c a3 2f(KEY A)
f5 83 a2 80             = b0 f1 22 03 a3 2f
3a 1c d5 a7            =  7f 6e 55 6c a3 2f
ae e0 46 1f             = a8 92 c6 f5 a3 2f
54 c2 2d 44             = ba b0 ad da a3 2f
e4 a0 06 51             = ?? ?? ?? ?? a3 2f

i cant get the pattern of this keys.hope someone can help me out on this.

Re: someone pls help me to decrypt it....

Look this topics: http://www.libnfc.org/community/topic/141/oysters/

Re: someone pls help me to decrypt it....

i still unable to figure it out...giving up..haizz

Re: someone pls help me to decrypt it....

4b 2c 7b 90  ^    XX7280XX = d6 5e fb 0b
94 80 57 50  ^    XX7280XX = 96 f2 d7 f2
bc 16 d4 5e  ^    XX7280XX = 8d 64 54 43
da 5d 44 7e  ^    XX7280XX = 76 2f c4 9e
f4 7c 40 44  ^    XX7280XX = 69 0e c0 a9
f2 1d e8 d5  ^    XX7280XX = 31 6f 68 00
26 47 33 fe  ^    XX7280XX = 9b 35 b3 79
e2 83 5b 95  ^    XX7280XX = 5c f1 db d9
84 fe 71 17  ^    XX7280XX = 89 8c f1 04
8A F4 27 17  ^  XX7280XX = D5 86 A7 B2
44 e0 5d 61  ^     XX7280XX = cd 92 dd 9a


XX seems to be too random