31 lines
987 B
ReStructuredText
31 lines
987 B
ReStructuredText
.. _fabric_key:
|
|
|
|
Fabric Key
|
|
~~~~~~~~~~
|
|
|
|
Fabric key is a secure key for users to generate bitstream for a specific FPGA fabric.
|
|
With this key, OpenFPGA can generate correct bitstreams for the FPGA.
|
|
Using a wrong key, OpenFPGA may error out or generate wrong bitstreams.
|
|
The fabric key support allows users to build secured/classified FPGA chips even with an open-source tool.
|
|
|
|
.. figure:: figures/fabric_key_motivation.png
|
|
:scale: 60%
|
|
:alt: map to buried treasure
|
|
|
|
The use of fabric key to secure the FPGA chip design
|
|
|
|
.. note:: Users are the only owner of the key. OpenFPGA will not store or replicate the key.
|
|
|
|
Key Generation
|
|
``````````````
|
|
A fabric key can be achieved in the following ways:
|
|
|
|
- OpenFPGA can auto-generate a fabric key using random algorithms (see detail in :ref:`cmd_build_fabric`)
|
|
|
|
- Users can craft a fabric key based on auto-generated file by following the file format description.
|
|
|
|
File Format
|
|
```````````
|
|
|
|
See details in :ref:`file_formats_fabric_key`
|