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        "author": "Bogdan Kulynych",
        "author_email": "hello@bogdankulynych.me",
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            "Development Status :: 3 - Alpha",
            "Intended Audience :: Developers",
            "License :: OSI Approved :: MIT License",
            "Natural Language :: English",
            "Operating System :: OS Independent",
            "Programming Language :: Python",
            "Programming Language :: Python :: 3",
            "Programming Language :: Python :: 3.6",
            "Programming Language :: Python :: Implementation :: CPython",
            "Topic :: Database",
            "Topic :: Security :: Cryptography",
            "Topic :: Software Development :: Libraries :: Python Modules"
        ],
        "description": ".. image:: https://raw.githubusercontent.com/spring-epfl/hippiepug/master/hippiepug.svg?sanitize=true\n   :width: 100px\n   :alt: Hippiepug\n\n#########\nhippiepug\n#########\n\n|pypi| |build_status| |test_cov| |docs_status| |license|\n\n\nSublinear-lookup blockchains and efficient key-value Merkle trees.\n\nCheck out the `documentation <https://hippiepug.readthedocs.io/>`_.\n\n.. |pypi| image:: https://img.shields.io/pypi/v/hippiepug.svg\n   :target: https://pypi.org/project/hippiepug/\n   :alt: PyPI version\n\n.. |license| image:: https://img.shields.io/pypi/l/hippiepug.svg\n   :target: https://pypi.org/project/hippiepug/\n   :alt: License\n\n.. |docs_status| image:: https://readthedocs.org/projects/hippiepug/badge/?version=latest\n   :target: https://hippiepug.readthedocs.io/?badge=latest\n   :alt: Documentation status\n\n.. |build_status| image:: https://api.travis-ci.org/spring-epfl/hippiepug.svg?branch=master\n   :target: https://travis-ci.org/spring-epfl/hippiepug\n   :alt: Build status\n\n.. |test_cov| image:: https://coveralls.io/repos/github/spring-epfl/hippiepug/badge.svg\n   :target: https://coveralls.io/github/spring-epfl/hippiepug\n   :alt: Test coverage\n\n--------------\n\n.. description-marker-do-not-remove\n\nThis library provides implementations of two cryptographic data structures:\n\n- Blockchains with log(n) sublinear traversal, implemented as high-integrity\n  deterministic skip-lists (skipchains). In this kind of blockchain verifying\n  that block *b* extends block *a* does not require to download and process\n  all blocks between *a* and *b*, but only a logarithmic amount of them.\n- Verifiable dictionary, implemented as a key-value Merkle tree that\n  guarantees unique resolution. A proof of inclusion of a key-value pair in\n  such a tree also proves that there does not exist another value for a given\n  key somewhere else in the tree.\n\nBoth are meant to be used with a content-addressable storage. Each data\nstructure supports logarithmic queries, and logarithmic proofs of inclusion:\n\n+-----------------------+--------------------------+----------------------+----------------+\n|                       | Retrievals per lookup    | Inclusion proof size | Append         |\n+=======================+==========================+======================+================+\n| Skipchain             | O(log(n))                | O(log(n))            | O(1)           |\n+-----------------------+--------------------------+----------------------+----------------+\n| Key-value Merkle tree | O(log(n))                | O(log(n))            | Immutable      |\n+-----------------------+--------------------------+----------------------+----------------+\n\nwith *n* being the size of the dictionary, or the number of blocks in the\ncase of a chain.\n\nThe theoretical details are in the `paper <https://arxiv.org/abs/1707.06279>`_.\n\n.. getting-started-marker-do-not-remove\n\n===============\nGetting started\n===============\n\nYou can install the library from PyPI:\n\n.. code-block::  bash\n\n   pip install hippiepug\n\nThen, the easiest way to run the tests is:\n\n.. code-block::  bash\n\n   python setup.py test\n\nBe sure to check out the `usage guide <https://hippiepug.readthedocs.org/usage.html>`_.\n\n.. acks-marker-do-not-remove\n\n================\nAcknowledgements\n================\n\n* The library is a reimplementation of G. Danezis's `hippiehug`_ (hence\n  the name).\n* This work is funded by the `NEXTLEAP project`_ within the European Union\u2019s\n  Horizon 2020 Framework Programme for Research and Innovation (H2020-ICT-2015,\n  ICT-10-2015) under grant agreement 688722.\n* The hippie pug logo kindly donated by `M. Naiem`_.\n\n.. _hippiehug:  https://github.com/gdanezis/rousseau-chain\n.. _NEXTLEAP project:  https://nextleap.eu\n.. _M. Naiem:  http://mariam.space",
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