Changes

* # Flashing the DES firmware to the target device (i.e.g. chipwhisperer/hardware/victims/firmware/simpleserial-des/simpleserial-des-xmega.hex), instead;# Setting an appropriate 'Total Samples' (e.g. 3500) and 'Offset' (e.g. 15500) in the ''Scope Settings'';# Setting the 'Key Length (Bytes)', 'Input Length (Bytes)' and 'Output Length (Bytes)' to 8 bytes in the ''Target Settings'';# Setting an appropriate 8 bytes Key in the ''Generic Settings (e.g. 2B 7E 15 16 28 AE D2 A6)''. * Or, alternatively, execute the script "setup_cwlite_xmega_des.py" to perform steps 2-4 (you still need to perform step 1 yourself). In the Analyzer, you'll need to modify the script to call the DES model instead of the AES model. This will mean: <pre>from chipwhisperer.analyzer.attacks.models.DES import DES, SBox_output</pre> And setting: <pre>leak_model = DES(SBox_output)</pre> See the example analyzer script for a complete listing of the required commands.

and:* Setting an appropriate 'Total Samples' and 'Offset' in Note that the ''Scope Settings'';* Setting attack attemps to recover the 'Key Length [[wikipedia:File:DES-key-schedule.png|first round key]], which only has 48bits (Bytes[[wikipedia:File:DES-f-function.png|8 s-boxes x 6 bits each]])', 'Input Length while the original key has 56 significative bits (Bytes64 if we count the parity bits that are irrelevant)' and 'Output Length (Bytes)' . So, if we map the first round key, obtained after the attack, to 8 bytes in the ''Target Settings'';* Setting an appropriate 8 bytes Key in original key (you can use the ''Generic Settings''provided DES Key Schedule Tool to do it), there will still be 8 bits missing (256 combinations).

* Or, alternatively, execute the script "ChipWhisperer-Lite[[File: DES SimpleSerial on XMEGA" to do the above steps automatically in this platformdeskeyschedulecalc.png]]

In the Analyzerthis example, it matches the only difference is to set the 'Crypto Algorithm' to DES in the ''Attack Settings''.original key that was:

[[File:breaking_deskey_des.png|896x896px801x801px]]

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