TFHE-rs v1.2 - May 2025
Summary
TFHE-rs v1.2.0 introduces the new HPU backend. The HPU (Homorphic Processing Unit) is a hardware accelerator for FHE operations.
See full details below:
Breaking changes
The shortint
ServerKey
does not directly hold the bootstrapping and keyswitch keys anymore. Instead, they are stored inside a genericAtomicPatternServerKey
object which allows to customize the content of the key materials.The conformance parameters for the integer
ServerKey
are now wrapped insideAtomicPatternParameters
.
CPU
New features
Add back&forth NTT implementation
Add support for dynamic atomic pattern at the shortint level. They allow to customize how lookup tables are evaluated.
Add the KeySwitch32 atomic pattern
Enable custom modulus generation for TUniform
Add AsRef implementation on ServerKey to access NoiseSquashingKey
Run ZK verification inside dedicated thread pools to redcuce the latency
Fixes
Fix success probability for Ternary Uniform generation
Remove additional body coeff in multi bit ms compression
Check that crs group element at index n is 0
GPU
New features
Implement ZK's expand
Implement 128 bit classic CG PBS
Add memory tracking functions for add, subtract, scalar add and scalar subtract
Add necessary entry points for 128 bit compression
Add circulant matrix for one vs many poly product
Fixes
Update panic condition on upper bound for the number of cuda blocks to apply only to Thread Block Clusters
Fix multi device execution with drift
HPU
New features
Add Hpu backend implementation
Resources
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