Single Party Examples

Applications

Application examples are examples showcasing specific capabilities of the library on scaled-down real world scenarios.

Binary

• bin_blind_rotations: an example showcasing the evaluation of the sign function using blind rotations on RLWE ciphertexts.

Integers

• int_ride_hailing: an example on privacy preserving ride hailing.
• int_vectorized_OLE: an example on vectorized oblivious linear evaluation using an RLWE trapdoor.

Reals/Complexes

• reals_bootstrapping: a series of examples showcasing the capabilities of the bootstrapping for fixed point arithmetic.

  • basics: an example showcasing the basic capabilities of the bootstrapping.
  • high_precision: an example showcasing high-precision bootstrapping.
  • slim: an example showcasing slim bootstrapping, i.e. re-ordering the steps of the bootstrapping.

• reals_scheme_switching: an example showcasing scheme switching between hefloat and hebin to complement fixed-point arithmetic with lookup tables.

• reals_sigmoid_chebyshev: an example showcasing polynomial evaluation of a Chebyshev approximation of the sigmoid.

• reals_sigmoid_minimax: an example showcasing polynomial evaluation of a minimax approximation of the sigmoid.

• reals_vectorized_polynomial_evaluation: an example showcasing vectorized polynomial evaluation, i.e. evaluating different polynomials in parallel on specific slots.

Templates

Templates are files containing the basic instantiation, i.e. parameters, key-generation, encoding, encryption and decryption.

• reals: a template for hefloat.
• int: a template for heint.

Tutorials

Tutorials are examples showcasing the basic capabilities of the library.

• reals: a tutorial on all the basic capabilities of the package hefloat.

Multi Party Examples

• int_pir: an example showcasing multi-party private information retrieval.
• int_psi: an example showcasing multi-party private set intersection.
• thresh_eval_key_gen: an example showcasing multi-party threshold key-generation.

Parameters

The params.go file contains several sets of example parameters for both heint and hefloat. These parameter are chosen to represent several degrees of homomorphic capacity for a fixed 128-bit security (according to the standard estimates at the time of writing). They do not represent a set of default parameters to be used in real HE applications. Rather, they are meant to facilitate quick tests and experimentation with the library.