Thursday, September 30, 2010

tech from flylogic is on Facebook

Nice place to see quick shots of general devices in Chris' life.

To prevent spammers, it's the tech @ address. See you there!

Monday, August 9, 2010

Atmel ATMEGA2560 Analysis (Blackhat follow-up)

At this years Blackhat USA briefings, the ATMEGA2560 was shown as an example of an unsecure vs. secure device.  We have received a few requests for more information on this research so here it goes...

The device did not even need to be stripped down because of designer lazyness back at Atmel HQ.  All we did was look for the metal plates we detailed back in our ATMEGA88 teardown last year and quickly deduced which outputs were the proper outputs in under 20 minutes.

Atmel likes to cover the AVR 'important' fuses with metal plating.  We assume to prevent the floating gate from getting hit with UV however the debunk to this theory is that UV will SET the fuses not clear them!

Image above shows you the location of the plates and two small red marks inside smaller, higher mag'd image.

For those who must absolutely know how to unlock the device, just click on the, "Money Shot!"

Sunday, August 8, 2010

Saturday, August 7, 2010

Parallax Propeller P8X32A Quick Teardown

Parallax has a really neat 8 core 32 bit CPU called the 'Propeller'.  It's been out for a few years but it is gaining popularity.  There is no security with the device as it boots insecurely via a UART or I2C EEPROM.  None the less, we thought it was interesting to see an 8 core CPU decapsulated!

The image above is the Propeller optically imaged 50x magnification.  One can clearly see 8 columns that appear almost symmetric (except in the middle region).  The upper 8 squares are each 'cogs' 512 * 32 SRAMs as described in the manual.  The middle left 4 and right 4 squares are the ROM's Parallax describes.  The 8 rectangular objects are the 32KB SRAM as described.  The 8 cores are basically the 8 columns above the middle ROM's to include the 512 * 32 SRAMs because they describe each cog as having it's own 512 * 32 SRAM :).

After removing the top metal (consisted mainly of routing tracks), we can see the 8 cores a little more clearly.  The metal over the 4 left ROMs has begun to remove as well in the image.

Above is a single COG rotated 90 degrees clockwise.  There are 8 of these objects in the upper half of the die.

Last but not least is the logo by Parallax.  Nice job Parallax on this beast!  We have one favor-  implement some flash on the next generation with a security bit ;).

Friday, August 6, 2010

Echostar v NDS appellate court ruling update

Normally, I would not mix non-technical with the blog however I thought this deserved a little more attention that it has received.

The ruling which states that NDS has won the lawsuit, vindicates myself and puts Echostar owing NDS almost 18,000,000.00 USD has come down as of 2 days ago.  You can download ruling in PDF form here.

As well I thought it nice to mention that neither Flylogic nor myself works for/or with Echostar, Nagra, NDS or any other conditional access company in any way or form.

I wish all persons whom this lawsuit effects the best (yes even you Charlie),

Christopher Tarnovsky

Sunday, February 14, 2010

Infineon / ST Mesh Comparison

Given all the recent exposure from our Infineon research, we have had numerous requests regarding the ST mesh architecture and how Infineon's design compares to the ST implementation.Â

We took a few pictures of an area of each device with an electron microscope to give you a better idea.  Both devices are a 4 metal ~140 nanometer process.  Rather than have us tell you who we think is stronger (it's pretty obvious), we'd like to see your comments on what you the readers think!Â

In the picture above, the left side is the standard Infineon mesh with the standard ST mesh on the right.   Both images were taken at 3,500 magnification.Â

The Infineon mesh consists of 5 zones with 4 circuits per zone.  This means the surface of the die is being covered by 20 different electrical circuits.

The ST mesh consists of a single wire routed zig-zag across the die.  It usually begins next to the VDD pad and ends at the opposite corner of the die.  The other wires are simply GND aka ground fingers.  On recent designs, we have caught ST using a few of the grounds to tie gates low (noise isolation of extra, unused logic we believe).Â

Zooming in at 15,000 magnification, the details of each mesh really begin to show.  Where at lower resolutions, the Infineon mesh looked dark and solid but as you can see, it is not.

In the Infineon scheme above, each colored wire is the same signal (4 of them per zone).  Each color will be randomly spaced per chip design and is connected at either the top or bottom of the die via Metal 3 inter-connects.

The ST simply has the single conductor labeled in red.  All green are the fingers of ground which can be usually cut away (removed) without penalty.  The latest ST K7xxx devices have a signal present that appears analog.  A closer look and a few minutes of testing proved it to simply need to be held high (logic '1') at the sampling side of the line.  Interesting how ST tried to obscure the signal.

Infineon does not permanently penalize you if the mesh is not properly repaired and the device is powered up.Â

ST will permanently penalize you with a bulk-erase of the non-volatile memory (NVM) areas if the sense line (red) is ever a logic low ('0') with power applied (irrelevant of reset/clock condition).

You tell us your opinion what you think security wise.   Make sure you study the images closely beause there are other things we didn't mention such as line spacing, etc. between the two designs which should be considered.

Friday, February 12, 2010

We are now on Twitter too!

We probably should have been tweeting (sic?) for some time now but we are finally doing it!

You can join/follow us here:

As well, you can always get to Flylogic through or :).

Problems solved!

We want to personally thank every one of you who responded offering your help!

We followed what many of you said to do and this seems to have worked.

Thank you again!