I
A couple samples:
8f3d2292ed824a20b8247f11c164d66d01012713492001270100002896130523007272
09b480d62be14be48cfa85cc3798729700023302012771601000000026141103005727
24be6a60efdb48d095dd288f8a025fc000083710001361801000002348130819003277
6dc7086e1c5a4af7bf5994981497cf76313736373737ffffffffffffffffffffffffff
87001290010001040000610573350078
Does anybody know what elementary file 2FE4 contain on SIM cards? It doesn't look like it is described in any standards I've looked at, and its contents varies widely across cards. Maybe boost for reach?
Right there lies mesh circuitry: three rows of contacts going to mesh wires on top of the die. Technically, the design has a mesh layer... but it is as effective as a fig leaf.
Die ID for visual identification. There is no ST logo, but it is highly certain it's them. Alignment and mask revision marks are also visible.
Hello! It's #nakeddiefriday today, and what I got for you is yet another smartcard chip. Please welcome an unnamed die marked K2D0A, fabbed by STMicro. This came from [REDACTED], used to [REDACTED]. The die oriented with power supply pads on top, so it's possible to figure out which die pads correspond to which module pads. Unusually enough, there are 6 pads bonded out; the function of the extra
pad is not known at this time-- certainly not VPP.
A short thread follows.
Closeup on the bits area.
First semi-successful attempt at deprocessing by lapping. The outcome is extremely uneven, with metal2 remains showing over metal1, and a larger corner area being ground down to substrate.
Despite that, it may be possible to recover around half the bits visible in the ROM block. If done more conservatively and with multiple intermediate steps, full recovery can be performed.
@tomjennings I dunno what everybody else does, I have a NAS box serving static content when I need to share something. I found this much more appealing than putting stuff on corpo services and being constantly pestered with "upgrade now for $$$" bullshit.
