TFHE-rs v0.4

TFHE-rs v0.4.0 includes:

In the High-Level API (HL API):

• Allowed scalar operations on values up to U256
• Added FheInt{8,16,32,64,128,256}
• Tied scalar ops with corresponding clear type
• Added C API support for FheInt

In the Integer API:

• Introduced full_propagate_parallelized with more parallelism
• Added full support for signed radix ciphertext
• Improved scalar multiplication
• Enhanced division using overflowing_sub
• Added smarter choice of the carry propagation algorithm

In the Core Crypto API:

• Added parallel LWE PFPKS and LWE KS
• Optimized monic polynomial operations in PBS
• Improved closest_representable and pbs_modulus_switch
• Added monomial fft for multibit pbs
• Added parallel variant of extract_lwe_sample_from_glwe
• Added GLWE linear algebra primitives

CSPRNG 0.4.0

Minimal Rust version set to 1.72 allowing compiling with stable toolchain and intrinsics on ARM devices.

TFHE-rs v0.3.1

TFHE-rs v0.3.1 includes:

In the HL API:

• Scalar operations are now compatible with scalars up to 256 bits;
• New instruction: if_then_else.

In the integer API:

• New instruction: if_then_else;
• Faster parallelized carry propagation.

In the boolean API:

• Choice of the bootstrapping pattern: KS->PBS or PBS->KS;
• Parameter update.

TFHE-rs v0.3.0

TFHE-rs v0.3.0 includes:

• In the High-level API:

  • Scalar_bitwise/div/rem operations
  • Not operator (!)
  • Scalar comparisons
  • Not equal
  • Bit rotations
  • Homomorphic shifts
  • Multibit PBS
  • Impl TryFrom operators for GenericInteger: RadixCiphertext and Vec
  • CompressedPublicKey decompression
  • CompressedServerKey
  • Casting between integer types
  • Use one unique key for integers
  • Trivial encryptions

• In the Integer API:

  • Division by encrypted value
  • Scalar division/remainder
  • Scalar comparisons
  • CastingKey struct to allow users to switch between integer parameter sets
  • Scalar_mul generic over UnsignedInteger
  • Reduced default sub latency
  • Faster scalar add, sub and negation
  • Scalar shift match rust when shift >= bit size
  • Shifts and rotates on encrypted values
  • Decompression of CompressedPublicKey
  • Faster mul and scalar mul
  • Faster parallel algorithms for add/sub
  • Parallelized scalar rotate_left/right
  • Improved scalar shift performance
  • Trivial encryption
  • Scalar bitwise operations
  • Faster eq (==)
  • Not equal operator (!=)

• In the Shortint API:

  • Encrypt_message_and_carry function
  • Possibility to select deterministic execution for multibit PBS
  • CastingKey struct to allow users to change server_key during a circuit execution on the server
  • The possibility to use multi bit PBS

• In the Boolean API:

  • BooleanEngine::replace_thread_local
  • CastingKey struct to allow users to change server_key during a circuit execution on the server
  • CompressedPublicKey

• In the Core Crypto API:

  • Compact Public Key
  • Std multi-bit bootstrapping
  • Deterministic Multibit PBS

• Test Improvements:

  • Test On Noise Variance For LWE Encryption
  • Normality Test Based On Shapiro-Francia

• Applications

  • Trivium application of TFHE
  • Boolean sha256 tutorial
  • Dark market tutorial
  • FHE Regex Pattern Matching Engine

• C / WASM APIs:

  • Safer destroys
  • #[repr(C)] for boolean parameters
  • Parralellism in wasm API and wasm for HLAPI (client side)

• Documentation

  • Refactor of the documentation

TFHE-rs version 0.2.5

TFHE-rs v0.2.5 features:

(integer) Fix max_degree computation for CompressedServerKey which led to incorrect computations once decompressed

TFHE-rs version 0.2.4

TFHE-rs v0.2.4 features:

(core) fix split pbs for u128
(core) fix a rare conversion corner case for f128
(integer) remove mutex usage to ensure determinism in some parallel operations

TFHE-rs version 0.2.3

TFHE-rs v0.2.3 features:

(docs) Fix typo

TFHE-rs version 0.2.2

TFHE-rs v0.2.2 features:

(core) Fix rng
(core) Disable split PBS u128 implementation
(boolean) Add BooleanEngine::replace_thread_local

TFHE-rs version 0.2.1

TFHE-rs v0.2.1 features:

• (integer) Fix default multiplication
• (integer) Improve Min/Max performance
• (hl_api) Add trivial_ciphertext to the high-level API
• (hl_api) Fix the number of blocks for FheUint32
• (Doc) Benches updated

TFHE-rs version 0.2.0

TFHE-rs v0.2.0 includes:

• New modules:

  • An integer module to manage homomorphic unsigned integers encrypting messages up to 256 bits;
  • A high-level API, including predefined homomorphic types and overloaded operators. A C binding is also available;

• New features in all modules:

  • Encryption key choice: In shortint and integer, the large LWE key is used by default. It is now possible to encrypt with the small one;
  • A smaller public encryption key: As a consequence of the previous point, a smaller secret encryption key implies a smaller public key;

• New features in core_crypto:

  • The ability to compute a PBS over 128-bit ciphertexts;
  • The choice of the ciphertext modulus: This can now be modified to use any powers of two smaller than 2^128;
  • Parallel Programmable Bootstrapping: A parallelized version of the bootstrapping is now available.