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Playlist "Easterhegg 2018"

Hacking your Fitbit

jiska and DanielAW

We'll show you how we reverse engineered Fitbit firmware, applications and their ecosystem.

This talk will be an extended version of "Doping your Fitbit" at 34C3. More details, more demos, and a special hands-on part. Please bring your own Fitbits!

Topics of the talk:

- Reversing an ARM firmware that does not contain function names and no debugging strings.

- Understanding the wireless firmware update process.

- Modifying firmware with Nexmon.

- Reversing the Java-based smartphone app to extract secrets and program your own app.