

- #CHANGE CODE ON DIGITAL SENTRY SAFE PATCH#
- #CHANGE CODE ON DIGITAL SENTRY SAFE FULL#
- #CHANGE CODE ON DIGITAL SENTRY SAFE SOFTWARE#
Some safes are equipped with a mechanical safe lock where you need to turn a dial to enter your code.

Changing the Combination on a Mechanical Safe Lock However, depending on whether you have a mechanical or electronic lock will determine the route you’ll need to take to get the job done. It is possible to change the combination on your safe lock.
#CHANGE CODE ON DIGITAL SENTRY SAFE SOFTWARE#
Good news, the open source pulseview software contains a lot of decoders including UART. So I guess it can be the most used asynchronous bus protocol: UART Only one microcontroller on each of them.Īccording to the datasheet, main communication protocols used with this microcontroller are SPI and I☬.īut not this time, cause both of them need a clock signal, and there is no movement on any of the other wires.

So let's take a look at the chips on boards. This safe is not open hardware or software, so we don't know how it works.
#CHANGE CODE ON DIGITAL SENTRY SAFE FULL#
To decode the full signal, we have to find the protocol used. We can see on the captured signal 5 repetitions of the same shape in a row, so we can assume that matches our "1" key pressed 5 times.

Black is always low, yellow & red are always high (so colors are respected). Result : only green wire has changing signal. This kind of electronic safe needs a 5 digits code, so for the first cature I will just press the "1" key 5 times. We can inspect circuit tracks to find the wire mapping, but as my new logic analyser can cature 8 channels, let's just plug each wire in. As the color of wires are not always respected, let's assume that we don't trust them.
#CHANGE CODE ON DIGITAL SENTRY SAFE PATCH#
I created an alternative PCB and firmware to patch this issue, available here Story The company was notified but never responded. A vulnerability allows opening electronic safes from the Sentry Safe and Master Lock company without any pin code.
