Hardware Setup

1. Connect the CW1173/CW1200 by USB cable to computer.

   

2. The software AES implementation that will run on the target is located in chipwhisperer\hardware\victims\firmware\simpleserial-aes. In a terminal window, navigate here and run the command make to build the firmware. As in previous tutorials, ensure that the firmware has been built for the correct board. Here, the output of make should end like

   AVR Memory Usage
   ----------------
   Device: atxmega128d3
   
   Program:    3078 bytes (2.2% Full)
   (.text + .data + .bootloader)
   
   Data:        352 bytes (4.3% Full)
   (.data + .bss + .noinit)
   
   
   Built for platform CW-Lite XMEGA
   
   -------- end --------
   

   Make sure that the platform is correct.

3. Upload the firmware to the target chip. The process to do this is the same as the previous tutorials:
   • Open the ChipWhisperer Capture software.
   • Connect to the ChipWhisperer. (You can do this using a script or by filling out the generic settings and connecting to the board yourself.)
   • Open the XMEGA Programmer (**Tools > ChipWhisperer-Lite XMEGA Programmer**).
   • Find the hex file you compiled and program it onto the target.

Capturing the Traces

1. Switch to the Python Console tab.
2. The script selection window (2) lists available example scripts. Scroll down to "connect_cwlite_simpleserial.py" and click on it.
3. You will see the script contents appear in the "Script Preview" window (3). You can either hit the "Run" button or double-click the filename of the script to execute it. Do either of those now.

The window should change to indicate the connect succeeded:

1. The console lists the exact script that is executed. Note you could have manually executed the script commands line-by-line in this console.
2. The "Scope" and "Target" buttons will show as connected.
3. The Status Bar will show a connection.

Note in previous software versions, this tutorial took you through manual setup. This can still be done (using the GUI), but instead now the API has been made more powerful, so the example configuration script will be used instead.

To do so, simply scroll down and select the "setup_cwlite_xmega_aes.py" file:

To complete the tutorial, follow these steps:

1. Switch to the General Settings tab
2. If you wish to change the number of traces, do so here. The default of 50 should be sufficient to break AES though!
3. Hit the Capture Many button (M in a green triangle) to start the capture process.
4. You will see each new trace plotted in the waveform display.
5. You'll see the trace count in the status bar. Once it says Trace 50 done (assuming you requested 50 traces) the capture process is complete.

Hardware Setup

1. Set jumpers on NOTDuino to default position (see silkscreen on bottom of NOTDuino for default positions).
2. Connect the NOTDuino using the SMA cable on the "measure" port, and the 20-pin IDC cable:

3. Connect the CW1173/CW1200 by USB cable to computer.

   

Capturing the Traces

1. Close & reopen the capture software (to clear out any previous connection which may be invalid).

2. From the Project menu elect the Example Scripts and then ChipWhisperer-Lite: AES SimpleSerial on ATMega328P

   

3. The script will automatically connect to the capture hardware and run 2 example traces. You should see something that looks like the following screen:

   

   To complete the tutorial, follow these steps:

   1. Switch to the General Settings tab
   2. If you wish to change the number of traces, do so here. The default of 50 should be sufficient to break AES though!
   3. Hit the Capture Many button (M in a green triangle) to start the capture process.
   4. You will see each new trace plotted in the waveform display.
   5. You'll see the trace count in the status bar. Once it says Trace 50 done (assuming you requested 50 traces) the capture process is complete.

4. Finally save this project using the File --> Save Project option, give it any name you want.
5. Skip ahead to #Analyzing_the_Traces.

Hardware Setup

This tutorial uses the CW1002_ChipWhisperer_Capture_Rev2 hardware along with the CW301_Multi-Target board. Note that you don't need hardware to complete the tutorial. Instead you can download example traces from the ChipWhisperer Site.

This example uses the Atmel AVR in 28-pin DIP programmed with a simpleserial communications protocol. This is the default firmware programmed into the devices, so you shouldn't need to do anything. If you've erased the device, you can see programming instructions in the Installing_ChipWhisperer section.

The Multi-Target board should be plugged into the ChipWhisperer Capture Rev2 via the 20-pin target cable. The VOUT SMA connector is wired to the LNA input on the ChipWhisperer-Capture Rev2 front panel. The general hardware setup is as follows:

1. 20-Pin Header connects Multi-Target to Capture Hardware
2. VOUT Connects to SMA Cable
3. SMA Cable connects to 'LNA' on CHA input
4. USB-Mini connects to side (NB: Confirm jumper settings in next section first)

Jumpers on the Multi-Target Victim board are as follows:

1. NO jumpers mounted in XMEGA Portion or SmartCard Portion (JP10-JP15, JP19, JP7-JP8, JP17)
2. 3.3V IO Level (JP20 set to INT.)
3. The 7.37 MHz oscillator is selected as the CLKOSC source (JP18)
4. The CLKOSC is connected to the AVR CLock Network, along with connected to the FPGAIN pin (JP4)
5. The TXD & RXD jumpers are set (JP5, JP6)
6. Power measurement taken from VCC shunt (JP1)
7. The TRIG jumper is set (JP28) (NOTE: Early revisions of the multi-target board do not have the TRIG jumper and you can ingore this).

For more information on these jumper settings see CW301_Multi-Target .

Setting up the Software

It is assumed that you've already followed the guide in Installing_ChipWhisperer. Thus it is assumed you are able to communicate with the ChipWhisperer Capture Rev2 hardware. Note in particular you must have configured the FPGA bitstream in the ChipWhisperer-Capture software, all part of the description in the Installing_ChipWhisperer guide.

Capturing the Traces

This tutorial uses a simple script that ships with the ChipWhisperer Capture software. The easiest method of accomplishing the trace capture is as follows:

1. Close & reopen the capture software (to clear out any previous connection which may be invalid).

2. From the Project menu elect the Example Scripts and then ChipWhisperer-Rev2: SimpleSerial Target

   

3. The script will automatically connect to the capture hardware and run 2 example traces. You should see something that looks like the following screen:

   

   To complete the tutorial, follow these steps:

   1. Switch to the General Settings tab
   2. If you wish to change the number of traces, do so here. The default of 50 should be sufficient to break AES though!
   3. Hit the Capture Many button (M in a green triangle) to start the capture process.
   4. You will see each new trace plotted in the waveform display.
   5. You'll see the trace count in the status bar. Once it says Trace 50 done (assuming you requested 50 traces) the capture process is complete.

4. Finally save this project using the File --> Save Project option, give it any name you want.
5. Skip ahead to #Analyzing_the_Traces.