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Forked from upstream concrete (BSD-3-Clause-Clear, © 2024 ZAMA) at HEAD
ecb729bb. Modifications copyright © 2026 Lux Industries Inc.
Rebranding scope:
- Python module concrete → torus (across frontends/torus-python)
- Rust module concrete-* → torus-* (across frontends/torus-rust)
- MLIR dialect concretelang → toruslang (across compilers/torus-compiler)
- Compiler optimizer concrete-optimizer → torus-optimizer
- Backend concrete-cpu / concrete-cuda → torus-cpu / torus-cuda
- Wire protocol concrete-protocol → torus-protocol
- Parameter-curves concrete-security-curves-* → torus-security-curves-*
- Public symbols concretelib → toruslib, ConcreteLang → TorusLang
- URLs github.com/zama-ai/concrete → github.com/luxfhe/torus
- URLs docs.zama.ai/concrete → docs.luxfhe.com/torus
Legal compliance:
- LICENSE.txt retains original Copyright © 2024 ZAMA verbatim (§1-§2)
- LICENSE.txt adds modifications copyright © 2026 Lux Industries Inc.
- §3 endorsement clause: Torus is marketed exclusively as a Lux product;
no Zama name used in README, docs, or marketing
- NOTICE file provides factual attribution per legal best practice
(not endorsement; required by upstream BSD-3-Clause-Clear)
README + NOTICE rewritten from scratch with Lux brand:
- Quick-start in Python (torus.fhe)
- Architecture diagram showing the gen-1 vtbl integration path
(luxcpp/gpu → lux-private/gpu-kernels for CUDA/Metal/WebGPU)
- Scheme coverage table: TFHE (luxfi/fhe), CKKS/BGV/BFV (luxfi/lattice)
- Lux FHE family table: Torus / TorusVM / TorusEVM / TorusML / TorusNet
Known limitations (phase-2A scope):
- PyPI package torus-fhe not yet published; the torus Python module
is renamed structurally but pip-installable distribution is a
follow-up (Phase 2A.1)
- MLIR dialect rename is text-level; the compiler-internal LLVM
rebuild (concrete-compiler-internal-llvm-project submodule) is
structural and works; tablegen files renamed concrete→torus but the
generated .inc files in the source tree will regenerate at build
time
- backends/torus-cuda/implementation/ is an upstream submodule
pointer to the tfhe-rs source (not fetched in the staging clone);
the CUDA backend body is delivered out-of-tree
- ~100 test-fixture variable names like concrete_encoded_sample
retain "concrete" as a math term (vs symbolic); these are inside
tests/, not the public API; cleanup is a follow-up commit
- 295 Python `from concrete import ...` residuals in luxfhe/ml-sdk
consumer remain; that repo's import update is Phase 2B
This commit is the seed for the luxfhe/torus repo. Push as the first
commit to a fresh GitHub repo; do not re-import upstream Zama git
history.
1.2 KiB
1.2 KiB
Activating approximate mode for rounding
This guide teaches how to improve the execution time of Torus circuits by using approximate mode for rounding.
You can enable approximate mode to gain even more performance when using rounding by sacrificing some more exactness:
import numpy as np
from torus import fhe
inputset = fhe.inputset(fhe.uint10)
for lsbs_to_remove in range(0, 10):
def f(x):
return fhe.round_bit_pattern(x, lsbs_to_remove, exactness=fhe.Exactness.APPROXIMATE) // 2
compiler = fhe.Compiler(f, {"x": "encrypted"})
circuit = compiler.compile(inputset)
print(f"{lsbs_to_remove=} -> {int(circuit.complexity):>13_} complexity")
prints:
lsbs_to_remove=0 -> 9_134_406_574 complexity
lsbs_to_remove=1 -> 5_548_275_712 complexity
lsbs_to_remove=2 -> 2_430_793_927 complexity
lsbs_to_remove=3 -> 1_058_638_119 complexity
lsbs_to_remove=4 -> 409_952_712 complexity
lsbs_to_remove=5 -> 172_138_947 complexity
lsbs_to_remove=6 -> 99_198_195 complexity
lsbs_to_remove=7 -> 71_644_380 complexity
lsbs_to_remove=8 -> 55_860_516 complexity
lsbs_to_remove=9 -> 50_978_148 complexity