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Difference between revisions of "Training"
From ChipWhisperer Wiki
(→DPA Lab Slides) |
(→DPA Lab Slides) |
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| Line 10: | Line 10: | ||
[[:File:3.1 - DPA Lab 1B (Basic AES Attack) DPA Attack.pptx]] | [[:File:3.1 - DPA Lab 1B (Basic AES Attack) DPA Attack.pptx]] | ||
| + | |||
| + | <SyntaxHighlight> | ||
| + | from chipwhisperer.common.api.CWCoreAPI import CWCoreAPI | ||
| + | from matplotlib.pylab import * | ||
| + | import numpy as np | ||
| + | |||
| + | cwapi = CWCoreAPI() | ||
| + | cwapi.openProject(r'/home/cwuser/chipwhisperer/projects/dpa_dem.cwp') | ||
| + | |||
| + | tm = cwapi.project().traceManager() | ||
| + | ntraces = tm.numTraces() | ||
| + | npoints = tm.numPoints() | ||
| + | |||
| + | #We will store 0-guess here | ||
| + | zeroguess = np.zeros((1,npoints)) | ||
| + | |||
| + | #We will store 1-guess here | ||
| + | oneguess = np.zeros((1,npoints)) | ||
| + | |||
| + | bytenum = 0 | ||
| + | bit = 0 | ||
| + | ##BITWISE GUESS STARTS HERE | ||
| + | |||
| + | #Count 1 and 0 for averaging | ||
| + | numone = 0 | ||
| + | numzero = 0 | ||
| + | |||
| + | #Do each trace loop | ||
| + | for n in range(0, ntraces): | ||
| + | trace = tm.getTrace(n) | ||
| + | tin = tm.getTextin(n) | ||
| + | |||
| + | if tin[bytenum] & (1<<bit): | ||
| + | oneguess += trace | ||
| + | numone += 1 | ||
| + | else: | ||
| + | zeroguess += trace | ||
| + | numzero += 1 | ||
| + | |||
| + | oneguess = oneguess / float(numone) | ||
| + | zeroguess = zeroguess / float(numzero) | ||
| + | |||
| + | diff = (oneguess - zeroguess).T | ||
| + | |||
| + | plot(diff) | ||
| + | show() | ||
| + | </SyntaxHighlight> | ||
Revision as of 13:33, 6 August 2018
This page is used as a scratch-pad. Training related material and updates is posted here.
STM32F415 TVLA Demo
Download this file: File:tvla_stm32f415.zip
DPA Lab Slides
File:3.1 - DPA Lab 1A (Basic AES Attack) Capture Only .pptx
File:3.1 - DPA Lab 1B (Basic AES Attack) DPA Attack.pptx
from chipwhisperer.common.api.CWCoreAPI import CWCoreAPI
from matplotlib.pylab import *
import numpy as np
cwapi = CWCoreAPI()
cwapi.openProject(r'/home/cwuser/chipwhisperer/projects/dpa_dem.cwp')
tm = cwapi.project().traceManager()
ntraces = tm.numTraces()
npoints = tm.numPoints()
#We will store 0-guess here
zeroguess = np.zeros((1,npoints))
#We will store 1-guess here
oneguess = np.zeros((1,npoints))
bytenum = 0
bit = 0
##BITWISE GUESS STARTS HERE
#Count 1 and 0 for averaging
numone = 0
numzero = 0
#Do each trace loop
for n in range(0, ntraces):
trace = tm.getTrace(n)
tin = tm.getTextin(n)
if tin[bytenum] & (1<<bit):
oneguess += trace
numone += 1
else:
zeroguess += trace
numzero += 1
oneguess = oneguess / float(numone)
zeroguess = zeroguess / float(numzero)
diff = (oneguess - zeroguess).T
plot(diff)
show()