43IT reconstructs the behavior of legacy embedded software and firmware when source code, documentation or original developers are no longer available.

How we work

We apply the same reverse engineering discipline that we use in litigation and technical evidence matters: careful handling of source material, reproducible analysis steps, and documentation written for the teams who will need to understand, verify or act on the findings - including engineering, audit or certification teams.

We provide:

• Static binary analysis on the original processor architecture.
• Dynamic analysis where the device or a representative testing environment is available.
• Reconstruction of communication and protocol behavior from captures.
• Documentation produced to the same standard we use for court-ready expert evidence.

Visit our technical capabilities page for details.

Our work is focused on reconstruction and documentation, not on implementing the replacement system. This keeps the analysis independent and gives engineering, compliance or legal teams a documented basis for their next steps.

When this is useful

Embedded software reconstruction can support projects where a legacy system must be well understood before it can be safely changed or replaced.

Typical situations include:

• Replacement of an obsolete embedded controller or software component.
• Missing or incomplete source code and design documentation.
• Supplier insolvency, discontinued products or unsupported devices.
• Migration from legacy hardware to a new platform.
• Re-certification, safety review or technical audit of an existing system.
• Reconstruction of interfaces, protocols, state machines and control logic.
• Independent documentation for successor engineering teams.

Lawful and documented analysis

All analysis is performed on the basis of materials, devices or data supplied by the rights holders.