Tutorial B7 Profiling Attacks (with HW Assumption) - Revision history

Adewar at 13:21, 29 July 2019

2019-07-29T13:21:11Z

2019-07-29T13:20:58Z

2019-07-29T13:18:27Z

2018-05-01T18:46:03Z

2016-06-09T19:36:23Z

‎Generating the Template

2016-06-09T19:35:59Z

‎Generating the Template

2016-06-09T17:27:46Z

‎Applying the Template

2016-06-09T17:25:22Z

‎Applying the Template

2016-06-09T17:22:58Z

‎Generating the Template

2016-06-09T17:22:21Z

‎Applying the Template

← Older revision		Revision as of 13:21, 29 July 2019
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−	{{Warningbox\|This tutorial has been updated for ChipWhisperer 5 release. If you are using 4~~.x.x or 3~~.x.x see the "V4" or ~~"V3"~~ link in the sidebar.}}	+	{{Warningbox\|This tutorial has been updated for ChipWhisperer 5 release. If you are using 4.x.x see the "V4" or link in the sidebar.}}

	{{Infobox tutorial		{{Infobox tutorial

← Older revision		Revision as of 13:18, 29 July 2019
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		+	{{Infobox tutorial
		+	\|name = B7: Profiling Attacks (with HW Assumption)
		+	\|image =
		+	\|caption =
		+	\|software versions =
		+	\|capture hardware = CW-Lite, CW-Lite 2-Part, CW-Pro
		+	\|Target Device =
		+	\|Target Architecture = XMEGA/Arm/Other
		+	\|Hardware Crypto = No
		+	\|Purchase Hardware =
		+	}}
		+
	This tutorial will demonstrate how to perform a profiling attack against the same AES implementation we've been using. To begin with we'll be using the same Hamming Weight (HW) assumption as previous attacks, although later we'll look into an attack without such assumptions.		This tutorial will demonstrate how to perform a profiling attack against the same AES implementation we've been using. To begin with we'll be using the same Hamming Weight (HW) assumption as previous attacks, although later we'll look into an attack without such assumptions.

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 <li><p>Press the ''Attack'' button. Observe that with only a few traces you are able to determine the encryption key:</p>
 <p>[[File:attack_working.png|image]]</p></li></ol>
 {{Template:Tutorials}}
 [[Category:Tutorials]]

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 <li>From the ''File --&gt; Open Project'' option, navigate to the <code>tut_randkey_randplain.cwp</code> file you save previously. Open this file, ensure it is the file corresponding with the '''randomly changing encryption key'''!</li>
 <li>Open the ''Trace Explorer'' tab and Enable it.</li>
-<li><p>Change the "Comparison Mode" to "Sum of Absolute Difference" and the ''Partition Mode'' to ''HW AES Intermediate'', and select the ''Auto-Save Data to Project'' option:</p>
+<li><p>Change the "Comparison Mode" to "Sum of Absolute Difference", the ''Partition Mode'' to ''HW AES Intermediate'', and select the ''Auto-Save Data to Project'' option:</p>
 <p>[[File:traceexplorer1.png|image]]</p></li>
 <li><p>Hit the ''Display'' button, and then select ''All On''. This displays the differences between the various groups of Hamming Weight (HW) values:</p>

@@ Line 45: / Line 45: @@
 <li>From the ''File --&gt; Open Project'' option, navigate to the <code>tut_randkey_randplain.cwp</code> file you save previously. Open this file, ensure it is the file corresponding with the '''randomly changing encryption key'''!</li>
 <li>Open the ''Trace Explorer'' tab and Enable it.</li>
-<li><p>Change the ''Partition Mode'' to ''HW AES Intermediate'', and select the ''Auto-Save Data to Project'' option:</p>
+<li><p>Change the "Comparison Mode" to "Sum of Absolute Difference" and the ''Partition Mode'' to ''HW AES Intermediate'', and select the ''Auto-Save Data to Project'' option:</p>
 <p>[[File:traceexplorer1.png|image]]</p></li>
 <li><p>Hit the ''Display'' button, and then select ''All On''. This displays the differences between the various groups of Hamming Weight (HW) values:</p>

@@ Line 85: / Line 85: @@
 <p>[[File:projecteditor_addtemplate.png|image]]</p></li>
 <li>Use the ''Save Editor to Disk'' button to write these changes (and '''not the Save Project option'''). Note this assumes that both the <code>tut_fixedkey_randplain.cwp</code> and <code>tut_randkey_randplain.cwp</code> were saved in the same directory, as otherwise the reference to the template file will break!</li>
-<li>Close the Analyzer software. Re-open the software and reload the same project file (e.g. <code>tut_fixedkey_randplain.cwp</code>), this step is needed to ensure the changes you added in are loaded into memory.</li>
+<li>Re-open the same project file (e.g. <code>tut_fixedkey_randplain.cwp</code>), this step is needed to ensure the changes you added in are loaded into memory.</li>
 <li><p>Change the attack module to ''Profiling'':</p>
 <p>[[File:selectprofiling.png|image]]</p></li>

@@ Line 75: / Line 75: @@
 partitiontype = PartitionHWIntermediate
 filename = avr_keyrand_plainrand_1000traces_data\analysis\templates-PartitionHWIntermediate-0-999.npz</pre></li>
-<li>Close the Analyzer software, as we will now apply this template.</li></ol>
+</ol>
 == Applying the Template ==

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 <ol style="list-style-type: decimal;">
 <li>From the ''File --&gt; Open Project'' option, navigate to the <code>tut_fixedkey_randplain.cwp</code> file you save previously. Open this file, ensure it is the file corresponding with the '''fixed encryption key'''!</li>
 <li>Open the project text editor if not already open.</li>
 <li><p>Append the ''Template Data'' section you copied from the previous project to your project file:</p>
 <p>[[File:projecteditor_addtemplate.png|image]]</p></li>
-<li>Use the ''Save Editor to Disk'' button to write these changes. Note this assumes that both the <code>tut_fixedkey_randplain.cwp</code> and <code>tut_randkey_randplain.cwp</code> were saved in the same directory, as otherwise the reference to the template file will break!</li>
+<li>Use the ''Save Editor to Disk'' button to write these changes (and '''not the Save Project button'''). Note this assumes that both the <code>tut_fixedkey_randplain.cwp</code> and <code>tut_randkey_randplain.cwp</code> were saved in the same directory, as otherwise the reference to the template file will break!</li>
 <li>Close the Analyzer software. Re-open the software and reload the same project file (e.g. <code>tut_fixedkey_randplain.cwp</code>), this step is needed to ensure the changes you added in are loaded into memory.</li>
 <li><p>Change the attack module to ''Profiling'':</p>