Metadata-Version: 2.1
Name: nucypher
Version: 4.8.2
Summary: A proxy re-encryption network to empower privacy in decentralized systems.
Home-page: https://github.com/nucypher/nucypher
Author: NuCypher
Author-email: dev@nucypher.com
License: GNU Affero General Public License, Version 3
Keywords: nucypher,proxy re-encryption
Platform: UNKNOWN
Classifier: Development Status :: 3 - Alpha
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: GNU Affero General Public License v3 or later (AGPLv3+)
Classifier: Natural Language :: English
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3 :: Only
Classifier: Programming Language :: Python :: 3.6
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Topic :: Security
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|image0|
*A decentralized cryptological network offering accessible, intuitive,
and extensible runtimes and interfaces for secrets management and
dynamic access control.*

|pypi| |pyversions| |codecov| |circleci| |discord| |Documentation
Status| |license|

--------------

The NuCypher network provides accessible, intuitive, and extensible
runtimes and interfaces for secrets management and dynamic access
control. \* Accessible - The network is permissionless and
censorship-resistant. There are no gate-keepers and anyone can use it.
\* Intuitive - The network leverages the classic cryptological narrative
of Alice and Bob (with additional characters where appropriate). This
character-based narrative permeates the code-base and helps developers
write safe, misuse-resistant code. \* Extensible - The network currently
supports proxy re-encryption but can be extended to provide support for
other cryptographic primitives.

Access permissions are baked into the underlying encryption, and access
can only be explicitly granted by the data owner via sharing policies.
Consequently, the data owner has ultimate control over access to their
data. At no point is the data decrypted nor can the underlying private
keys be determined by the NuCypher network.

Under the hood, the NuCypher network uses the
`Umbral <https://github.com/nucypher/pyUmbral>`__ threshold proxy
re-encryption scheme to provide cryptographic access control.

How does NuCypher work?
=======================

|image8|

1. Alice, the data owner, grants access to her encrypted data to anyone
   she wants by creating a policy and uploading it to the NuCypher
   network.

2. A group of Ursulas, which are nodes on the NuCypher network, receive
   information about the policy, called a PolicyArrangement that include
   a re-encryption key share. The Ursulas stand ready to re-encrypt data
   in exchange for payment in fees and token rewards. Thanks to the use
   of proxy re-encryption, Ursulas and the storage layer never have
   access to Alice’s plaintext data.

3. Each policy created by Alice has an associated encryption key, which
   can be used by any entity (Enrico) to encrypt data on Alice’s behalf.
   This entity could be an IoT device in her car, a collaborator
   assigned the task of writing data to her policy, or even a
   third-party creating data that belongs to her – for example, a lab
   analyzing medical tests. The resulting encrypted data can be uploaded
   to IPFS, Swarm, S3, or any other storage layer.

4. Bob, a data recipient, obtains the encrypted data from the storage
   layer and sends an access request to the NuCypher network. If the
   policy is satisfied, the data is re-encrypted to his public key and
   he can decrypt it with his private key.

5. Ursulas earn fees and token rewards for performing re-encryption
   operations.

More detailed information:

-  Documentation https://docs.nucypher.com/
-  Website https://www.nucypher.com/

Whitepapers
===========

Network
~~~~~~~

`*“NuCypher - A proxy re-encryption network to empower privacy in
decentralized
systems”* <https://github.com/nucypher/whitepaper/blob/master/whitepaper.pdf>`__

*by Michael Egorov, David Nuñez, and MacLane Wilkison - NuCypher*

Economics
~~~~~~~~~

`*“NuCypher - Staking Protocol &
Economics”* <https://github.com/nucypher/whitepaper/blob/master/economics/staking_protocol/NuCypher_Staking_Protocol_Economics.pdf>`__

*by Michael Egorov, MacLane Wilkison, Arjun Hassard - NuCypher*

`*“NuCypher - Pricing Protocol &
Economics”* <https://github.com/nucypher/whitepaper/blob/master/economics/pricing_protocol/NuCypher_Network__Pricing_Protocol_Economics.pdf>`__

*by Arjun Hassard - NuCypher*

Cryptography
~~~~~~~~~~~~

`*“Umbral: A Threshold Proxy Re-Encryption
Scheme”* <https://github.com/nucypher/umbral-doc/blob/master/umbral-doc.pdf>`__

*by David Nuñez*

Getting Involved
================

NuCypher is a community-driven project and we’re very open to outside
contributions.

All our development discussions happen in our `Discord
server <https://discord.gg/7rmXa3S>`__, where we’re happy to answer
technical questions, discuss feature requests, and accept bug reports.

If you’re interested in contributing code, please check out our
`Contribution
Guide <https://docs.nucypher.com/en/latest/support/contribution.html>`__
and browse our `Open
Issues <https://github.com/nucypher/nucypher/issues>`__ for potential
areas to contribute.

Get up and running quickly by using our `docker development
setup <dev/docker/README.md>`__

Security
========

If you identify vulnerabilities with *any* nucypher code, please email
security@nucypher.com with relevant information to your findings. We
will work with researchers to coordinate vulnerability disclosure
between our stakers, partners, and users to ensure successful mitigation
of vulnerabilities.

Throughout the reporting process, we expect researchers to honor an
embargo period that may vary depending on the severity of the
disclosure. This ensures that we have the opportunity to fix any issues,
identify further issues (if any), and inform our users.

Sometimes vulnerabilities are of a more sensitive nature and require
extra precautions. We are happy to work together to use a more secure
medium, such as Signal. Email security@nucypher.com and we will
coordinate a communication channel that we’re both comfortable with.

A great place to begin your research is by working on our testnet.
Please see our `documentation <https://docs.nucypher.com>`__ to get
started. We ask that you please respect testnet machines and their
owners. If you find a vulnerability that you suspect has given you
access to a machine against the owner’s permission, stop what you’re
doing and immediately email security@nucypher.com.

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.. |pypi| image:: https://img.shields.io/pypi/v/nucypher.svg?style=flat
   :target: https://pypi.org/project/nucypher/
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   :target: https://pypi.org/project/nucypher/
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   :target: https://codecov.io/gh/nucypher/nucypher
.. |circleci| image:: https://img.shields.io/circleci/project/github/nucypher/nucypher.svg?logo=circleci
   :target: https://circleci.com/gh/nucypher/nucypher/tree/main
.. |discord| image:: https://img.shields.io/discord/411401661714792449.svg?logo=discord
   :target: https://discord.gg/7rmXa3S
.. |Documentation Status| image:: https://readthedocs.org/projects/nucypher/badge/?version=latest
   :target: https://nucypher.readthedocs.io/en/latest/
.. |license| image:: https://img.shields.io/pypi/l/nucypher.svg
   :target: https://www.gnu.org/licenses/gpl-3.0.html
.. |image8| image:: ./docs/source/.static/img/nucypher_overview.png

