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Updated readme to be in line with the docs - included overview image.

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derekpierre 2019-10-04 09:18:34 -04:00
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![](/docs/source/.static/img/nucypher.png)
![](./docs/source/.static/img/nucypher.png)
*A decentralized cryptological network offering accessible, intuitive, and extensible runtimes and interfaces for secrets management and dynamic access control.*
@ -32,27 +32,32 @@ threshold proxy re-encryption scheme to provide cryptographic access control.
# How does NuCypher work?
![](./docs/source/.static/img/nucypher_overview.svg)
01. 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.
02. Using her policy's public key, any entity can encrypt data on Alice's behalf.
02. 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.
03. 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.
03. A group of Ursulas, which are nodes of the NuCypher network,
receive the access policy and 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.
04. 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.
04. Bob, a data recipient, sends an access request to the NuCypher network.
If Bob was granted an access policy by Alice,
the data is re-encrypted for his public key,
and he can subsequently decrypt it with his private key.
05. Ursulas earn fees and token rewards for performing
re-encryption operations.
More detailed information: