Approved_users, bureaucrat, administrator
1,956
edits
Changes
no edit summary
Caution: be careful using the ChipWhisperer Pro's SAD trigger! The discarded ADC samples are still used as input for the SAD trigger module. If your reference trace was captured using downsampling, then the ChipWhisperer will never find this downsampled pattern in the raw samples.
=== Example ===
The following shows the standard AES, captured on the CW-Lite at 1:128 downsampling (with a 29.538 MS/s ADC, giving effective sample rate of 230.77 KS/s):
[[File:cwlite-longcapture.png|600px]]
This capture remains synchronous to the target device still, despite the huge downsampling factor. This allows attacks to succeed at surprisingly low sample rates (this sample rate is probably a little extreme, but you can see the 100 mS capture time).
[[Category:Tips]]