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**PY**\ thon **F**\ or **H**\ omomorphic **E**\ ncryption **L**\ ibraries, **Pyfhel** implements functionalities of multiple Homomorphic Encryption libraries such as addition, multiplication, exponentiation or scalar product in Python. **Pyfhel** uses a syntax similar to normal arithmetics (+,-,\*). This library is useful both for simple Homomorphic Encryption Demos as well as for complex problems such as Machine Learning algorithms.

**Pyfhel** is built on top of **Afhel**, an **A**\ bstraction **F**\ or **H**\ momorphic **E**\ ncryption **L**\ ibraries in C++. **Afhel** serves as common API for all backends.

* :bolditalic:`Version`: |release|.
* :bolditalic:`Status`: STABLE.
* :bolditalic:`Language`: Python (3.7+) & Cython on top of C++17.
* :bolditalic:`OS`: Windows (tested with ``MSVC2017``, ``MSVC2019``), Linux / WSL (tested on ``gcc6`` upwards) and MacOS (``gcc6`` upwards, NO CLANG).

.. warning::	|warning| *REQUIRED: Python must have been compiled with C++17:* ``g++>=6`` *|* ``MSVC 2017+`` |warning|
	
* :bolditalic:`Dependencies`: There are two possible backends (both shipped alongside Pyfhel), HE libraries in C++:
   
  1.  `SEAL <https://github.com/microsoft/SEAL/>`_ (no external dependencies, default).
  2.  `PALISADE <https://git.njit.edu/palisade/PALISADE.git>`_ (no external dependencies) **WIP**

.. note:: The current version supports `SEAL <https://github.com/microsoft/SEAL/>`_ only

Index
====================

.. toctree::
    :glob:
    :maxdepth: 2
    
    source/getting_started
    _autoexamples/index
    source/API_reference
    source/API_serialized

Glossary and tables
====================

* :ref:`genindex`
* :ref:`search`