Comments (2)
Thank you, i understand
from concrete-ml.
Hello @maxwellgodv,
Thank you for reaching out to us.
To use Fully Homomorphic Encryption (FHE) with Concrete ML, it is necessary to convert your machine learning model into an FHE-compatible model.
In this use-case, we explain how to convert a custom Torch neural network into its FHE-equivalent.
An FHE-equivalent model means that the model is quantized and the maximum precision of the operation graph is less than 16 bits. So:
- The
bit
hyper-parameter inQuantVGG11
: refers to the quantization bit, an essential hyper-parameter in Concrete-ML, required to quantize the input, weights, activation functions and output. This quantization step is mandatory as FHE operates only over integers with a precision limit of 16 bits. In the provided use-case, we used 5 bits to quantize the model and the inputs.
For custom models, Concrete ml uses Brevitas library for quantization.
- The circuit bit-width :
Now that your custom neural network is quantized with a precision of 5-bits. You have to check whether the maximum bit-width of your circuit is less than 16 bits. To do so, we usecompile_brevitas_qat_model
, which under the hood generates an executable operation graph, determines cryptographic parameters and raises an error if the maximum bit-width exceeds 16 bits. In this case, you have to decrease the quantization bit.
Thanks !
from concrete-ml.
Related Issues (20)
- installation error HOT 7
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