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Difference between revisions of "Training"
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[[:File:3.1 - DPA Lab 1B (Basic AES Attack) DPA Attack.pptx]] | [[:File:3.1 - DPA Lab 1B (Basic AES Attack) DPA Attack.pptx]] | ||
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| + | [[:File:3.2 - DPA Lab 2 (Resync Example).pptx]] | ||
=== Bitwise DPA: Starting Example === | === Bitwise DPA: Starting Example === | ||
Latest revision as of 15:04, 6 August 2018
This page is used as a scratch-pad. Training related material and updates is posted here.
Contents
STM32F415 TVLA Demo
Download this file: File:tvla_stm32f415.zip
DPA Lab Slides
File:3.0 - Differential Power Analysis.pptx
File:3.1 - DPA Lab 1A (Basic AES Attack) Capture Only .pptx
File:3.1 - DPA Lab 1B (Basic AES Attack) DPA Attack.pptx
File:3.2 - DPA Lab 2 (Resync Example).pptx
Bitwise DPA: Starting Example
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()Bitwise DPA - Full Example
#wiki.newae.com/Training
from chipwhisperer.common.api.CWCoreAPI import CWCoreAPI
from matplotlib.pylab import *
import numpy as np
cwapi = CWCoreAPI()
cwapi.openProject(r'/home/cwuser/chipwhisperer/projects/aes_dpa_day1.cwp')
tm = cwapi.project().traceManager()
ntraces = tm.numTraces()
npoints = tm.numPoints()
bytenum = 0
##BITWISE GUESS STARTS HERE
guess = 0x00
#Do each trace loop
for bit in range(0, 8):
#We will store 0-guess here
zeroguess = np.zeros((1,npoints))
#We will store 1-guess here
oneguess = np.zeros((1,npoints))
#Count 1 and 0 for averaging
numone = 0
numzero = 0
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
if (diff[236] > 0):
guess |= (1<<bit)
plot(diff)
print "0x%02x"%guess
show()