Articles by Guillaume Heilles

The Tari Labs mandated Quarkslab to perform a cryptographic and security assessment of the dalek libraries. One of the Tari Labs' projects is to implement the Tari protocol, a decentralised assets protocol. It relies on some of the dalek libraries, especially the cryptographic primitives, provided by subtle and curve25519-dalek. Moreover, the use of Bulletproofs [6], and its implementation by the authors of the dalek libraries, will allow them to enable efficient confidential transactions on the blockchain in a near future.

We only found some minor issues. We also provided recommendations on the usage of the libraries and third-party libraries.

In this article we describe how we created a low cost training Electronic Control Unit (ECU) that can be attacked at will, without damaging a real car. The whole project is open-source on Quarkslab's github page.

Second part of a blog post series about our approach to dump a flash chip. In this article we describe how to restore functionality of a device with a flexible setup.

This blog post presents the reverse engineering of an OBD2 dongle called "Nitro OBD2". It is advertised like this: "NitroOBD2 is a Chip Tuning Box which can be plugged into OBD2 connector of your car to increase the performance of your car." There are a lot of testimonies on the internet about this device being a fake, while other people say that is is really working. We wanted to reverse engineer it to check by ourselves.

First part of a blog post series about our approach to dump a flash chip. In this article we describe how to desolder the flash, design and build the corresponding breakout board.