CW310/Bergen Board Demo Results Question

Embedded Security ChipWhisperer Hardware
1

Hello,

I am testing the provided demo project with a simple AES on the CW310/Bergen board. I noticed that I cannot break the AES with 5k traces or even 50k traces. At 50k about half of the bytes have been recovered. I believe this is essentially the same design as the one used for the CW305 board, and that breaks within 5k traces easily. I am also using the same attack model as what is used for the CE305 demo. Do you have an explanation for this behavior?

Thanks,

Jackie

2
  1. Exactly which bitfile are you using?
  2. Do you have the “normal” version or the “SCA” version of the CW310?
3

  1. I am using my own bitstream generated from the AES project in the cw310-Bergen-board repo.

  2. I have the K410T normal board, I didn’t know there were two variations. Is there documentation on the differences between the two versions?

4

Yes, as explained here the normal version has decoupling capacitors mounted, which makes it less suitable for side-channel work.

We can convert the board for you (remove the decoupling capacitors); contact sales@newae.com for pricing.

1 Like
5

Just to confirm, these are capacitors C21 through C29 and C180 on the schematic right? I assume so since the notation implies they would not be on the SCA version, but wanted to double check.

6

Yes, that is correct.

1 Like
7

Hello, I’d like to know if I can change the CW340/Luna board normal version to the SCA version using the same method.

8

Yes- the capacitors to switch from normal to SCA are on the CW341 daughtercard:
they are the 10 caps connected to +1V0 on page 2 here: cw340-luna-board/cw341-kintexus-ku095/NPCA-CW341-KINTEXUS-03.PDF at main · newaetech/cw340-luna-board · GitHub
(C36, 40, 35, 44, 39, 29, 42, 26, 21, 20)