Easy way to combine projects for analysis?

Embedded Security ChipWhisperer Software
1

Hello. I am running experiments where I need to analyze millions of traces and was wondering if there was an easy way to combine data smaller data sets for analysis in CW5?

For example, I captured two different sets of 500k traces, each in a separate project. I would like to combine the data from these two projects in order to to perform an attack on all 1 million traces at once. In CW4 I always manually selected files to add for analysis, but I was wondering if there was a better way to do this in CW5.

Thank you for your time.

2

Hi Jackie,

project.traces supports the extend method so you should be able to do something along the lines of:

proj1 = cw.open_project("<path1>")
proj2 = cw.open_project("<path2>")

proj1.traces.extend(proj2.traces)

I’m not sure what your plans are regarding analysis, but one suggestion I’ll make is to check out LASCAR (https://github.com/Ledger-Donjon/lascar), which offers a pretty substantial speed upgrade over the Analyzer part of ChipWhisperer.

Hope that helps,

Alex

3

Alex, thank you very much! This is very helpful. I remember you mentioning LASCAR earlier, will take another look at it. Thanks!

1 Like
4

Hello,

I am trying to combine 2 projects together with ‘extend’ function as seen below :

# project100 has 100 traces
projectFile = "./projects/test/Proj_TraceAES100.cwp"
project100 = cw.open_project(projectFile)

# project200 has 200 traces
projectFile200 = "./projects/test/Proj_TraceAES200.cwp"
project200 = cw.open_project(projectFile200)

# combine the two projects
project100.traces.extend(project200.traces)

# check that project100 has 300 traces
project100.traces

at the end, I proceed with the number of traces of the project to check If the addition has been made and I always have the number of traces of the project alone.

The verification is not good or the addition has not been made ?

Thank you for your time.

5

Answered here.