This board has been designed with side channel attack measurements in mind.
It is meant to be inserted inline with supply rails, either on the high or low side.
A potentiometer allows you to vary the inline resistance, another one allows you to change the overall gain.
The sensor frequency response for different shunt and gain potentiometers positions can be seen below.
From DC to 50MHz:
From DC to 1GHz:
As you can see, high frequencies get amplified the most, which will actually be beneficial in an attack measurement setup as wires will attenuate high frequencies.
In side channel attacks, noise is your enemy.
In the center of the board you'll notice 0.1" header holes to solder a quiet 3.7V to 4.1V power supply source (pinout is shown at the back of the board). If you choose to solder a 18650 cell holder, rest assured the board contains a protection circuit against under/over voltage conditions.
Similarly, the power supply going to your attack target should also be very quiet.
When performing side channel attacks the following rules should be followed:
A clean power supply (between 3.6V and 4.2V) needs to be provided through the two holes in the top of the board. You may add a 18650 holder to your order in order to use a 18650 battery. Moreover, the board requires a CR1220 coin cell battery.
All of our devices are shipped from Shenzhen, China. It takes between 2 to 3 weeks to receive your order.