[0.4.2] - 2025-12-21

poulpy-core

• Add GLWEMulPlain trait:
  • glwe_mul_plain_tmp_bytes
  • glwe_mul_plain
  • glwe_mul_plain_inplace
• Add GLWEMulConst trait:
  • glwe_mul_const_tmp_bytes
  • glwe_mul_const
  • glwe_mul_const_inplace
• Add GLWETensoring trait:
  • glwe_tensor_apply_tmp_bytes
  • glwe_tensor_apply
  • glwe_tensor_relinearize_tmp_bytes
  • glwe_tensor_relinearize
• Add method tests:
  • test_glwe_tensoring

poulpy-hal

• Removed Backend generic from VecZnxBigAllocBytesImpl.
• Add CnvPVecL and CnvPVecR structs.
• Add CnvPVecBytesOf and CnvPVecAlloc traits.
• Add Convolution trait, which regroups the following methods:
  • cnv_prepare_left_tmp_bytes
  • cnv_prepare_left
  • cnv_prepare_right_tmp_bytes
  • cnv_prepare_right
  • cnv_by_const_apply
  • cnv_by_const_apply_tmp_bytes
  • cnv_apply_dft_tmp_bytes
  • cnv_apply_dft
  • cnv_pairwise_apply_dft_tmp_bytes
  • cnv_pairwise_apply_dft
• Add the following Reim4 traits:
  • Reim4Convolution
  • Reim4Convolution1Coeff
  • Reim4Convolution2Coeffs
  • Reim4Save1BlkContiguous
• Add the following traits:
  • i64Save1BlkContiguous
  • i64Extract1BlkContiguous
  • i64ConvolutionByConst1Coeff
  • i64ConvolutionByConst2Coeffs
• Update signature Reim4Extract1Blk to Reim4Extract1BlkContiguous.
• Add fft64 backend reference code for
  • reim4_save_1blk_to_reim_contiguous_ref
  • reim4_convolution_1coeff_ref
  • reim4_convolution_2coeffs_ref
  • convolution_prepare_left
  • convolution_prepare_right
  • convolution_apply_dft_tmp_bytes
  • convolution_apply_dft
  • convolution_pairwise_apply_dft_tmp_bytes
  • convolution_pairwise_apply_dft
  • convolution_by_const_apply_tmp_bytes
  • convolution_by_const_apply
• Add take_cnv_pvec_left and take_cnv_pvec_right methods to ScratchTakeBasic trait.
• Add the following tests methods for convolution:
  • test_convolution
  • test_convolution_by_const
  • test_convolution_pairwise
• Add the following benches methods for convolution:
  • bench_cnv_prepare_left
  • bench_cnv_prepare_right
  • bench_cnv_apply_dft
  • bench_cnv_pairwise_apply_dft
  • bench_cnv_by_const
• Update normalization API and OEP to take res_offset: i64. This allows the user to specify a bit-shift (positive or negative) applied to the normalization. Behavior-wise, the bit-shift is applied before the normalization (i.e. before applying mod 1 reduction). Since this is an API break, opportunity was taken to also re-order inputs for better consistency.
  • VecZnxNormalize & VecZnxNormalizeImpl
  • VecZnxBigNormalize & VecZnxBigNormalizeImpl
    This change completes the road to unlocking full support for cross-base2k normalization, along with arbitrary positive/negative offset. Code is not ensured to be optimal, but correctness is ensured.

[0.4.1] - 2025-11-21

• Default backend set to poulpy-cpu-ref, poulpy-cpu-avx is not anymore built and compiled by default.
• To build & use poulpy-cpu-avx user must use feature flag, see poulpy-cpu-ref and poulpy-cpu-avx READMEs.

[0.4.0] - 2025-11-19

Summary

• Full support for base2k operations.
• Many improvments to BDD arithmetic.
• Removal of poulpy-backend & spqlios backend.
• Addition of individual crates for each specific backend.
• Some minor bug fixes.

poulpy-hal

• Add cross-base2k normalization

poulpy-core

• Add full support for automatic cross-base2k operations & updated tests accordingly.
• Updated noise helper API.
• Fixed many tests that didn't assess noise correctly.
• Fixed decoding function to use arithmetic rounded division instead of arithmetic right shift.
• Fixed packing to clean values correctly.

poulpy-schemes

• Renamed tfhe crate to bin_fhe.
• Improved support & API for BDD arithmetic, including multi-thread acceleration.
• Updated crate to support cross-base2k operations.
• Add additional operations, such as splice_u8, splice_u16 and sign extension.
• Add GLWEBlindRetriever and GLWEBlindRetrieval: a GGSW-based blind reversible retrieval (enables to instantiate encrypted ROM/RAM like object).
• Improved Cmux speed

poulpy-cpu-ref

• A new crate that provides the refernce CPU implementation of poulpy-hal. This replaces the previous poulpy-backend/cpu_ref.

poulpy-cpu-avx

• A new crate that provides an AVX/FMA accelerated CPU implementation of poulpy-hal. This replaces the previous poulpy-backend/cpu_avx.

[0.3.2] - 2025-10-27

poulpy-hal

• Improved convolution functionality

poulpy-core

• Rename GLWEToLWESwitchingKey to GLWEToLWEKey.
• Rename LWEToGLWESwitchingKey to LWEToGLWEKey.
• Add GLWESecretTensor which stores the flattened upper right of the tensor matrix of the pairs sk[i] * sk[j].
• Add GGLWEToGGSWKey, GGLWEToGGSWKeyPrepared, GGLWEToGGSWKeyCompressed, which encrypts the full tensor matrix of all pairs sk[i] * sk[j], with one GGLWE per row.
• Update GGLWEToGGSW API to take GGLWEToGGSWKey instead of the GLWETensorKey
• Add GLWETensor, the result of tensoring two GLWE of identical rank.
• Changed GLWETensorKey to be an encryption of GLWESecretTensor (preliminary work for GLWEFromGLWETensor, a.k.a relinearization).

poulpy-schemes

• Add GLWEBlindRotation, a GGSW-based blind rotation that evaluates GLWE <- GLWE * X^{((k>>bit_rsh) % 2^bit_mask) << bit_lsh}. (k = FheUintBlocksPrepared).
• Add GGSWBlindRotation, a GGSW-based blind rotation that evaluates GGSW <- (GGSW or ScalarZnx) * X^{((k>>bit_rsh) % 2^bit_mask) << bit_lsh}. (k = FheUintBlocksPrepared).

[0.3.1] - 2025-10-24

poulpy-hal

• Add bivariate convolution (X, Y) / (X^{N} + 1) with Y = 2^-K

poulpy-core

• Fix typo in impl of GGLWEToRef for GLWEAutomorphismKey that required the data to be mutable.

[0.3.0] - 2025-10-23

• Fixed builds on MACOS

Breaking changes

• The changes to poulpy-core required to break some of the existing API. For example the API prepare_alloc has been removed and the trait Prepare<...> has been broken down for each different ciphertext type (e.g. GLWEPrepare). To achieve the same functionality, the user must allocated the prepared ciphertext, and then call prepare on it.

poulpy-hal

• Added cross-base2k normalization

poulpy-core

• Added functionality-based traits, which removes the need to import the low-levels traits of poulpy-hal and makes backend agnostic code much cleaner. For example instead of having to import each individual traits required for the encryption of a GLWE, only the trait GLWEEncryptSk is needed.

poulpy-schemes

• Added basic framework for binary decicion circuit (BDD) arithmetic along with some operations.

• Fix #88
• Fix #87
• Fix #91
• Fix #93
• Fix compilation on macOS

[0.2.0] - 2025-09-15

Breaking changes

• Updated the trait FillUniform to take log_bound.

poulpy-hal

• Added pure Rust reference code for vec_znx and fft64 backend.
• Added cross-backend generic test suite along with macros.
• Added benchmark generic test suite.

poulpy-backend

• Added FFTRef backend, which provides an implementation relying on the reference code of poulpy-hal.
• Added FFTAvx backend, which provides a pure Rust AVX/FMA accelerated implementation of FFTRef backend.
• Added cross-backend tests between FFTRef and FFTAvx.
• Added cross-backend tests between FFTRef and FFT64Spqlios.

poulpy-core

• Removed unsafe blocks.
• Added tests suite for FFTRef and FFTAvx backends.

Other

• Fixed a few minor bugs.