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* preview content and prompt users to describe media when uploading * add 'alt' attributes to rendered media-tag content if it is included in the file's encrypted metadata * add alt attributes to some related UI elements |
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readme.md
CryptPad
CryptPad is a collaboration suite that is end-to-end-encrypted and open-source. It is built to enable collaboration, synchronizing changes to documents in real time. Because all data is encrypted, the service and its administrators have no way of seeing the content being edited and stored.
Installation
For development
Our developer guide provides instructions for setting up a local instance without HTTPS or our more advanced security features.
For production
Configuring CryptPad for production requires a little more work, but the process is described in our admin installation guide. From there you can find more information about customization and maintenance.
Current version
The most recent version and all past release notes can be found here.
Setup using Docker
See CryptPad-Docker repository for details on how to get up-and-running with CryptPad in Docker. This repository is maintained by the community and not officially supported.
Security
CryptPad offers a variety of collaborative tools that encrypt your data in your browser before it is sent to the server and your collaborators. In the event that the server is compromized the database holds encrypted data that is not of much value to attackers.
The code which performs the encryption is still loaded from the host server like any other web page, so you still need to trust the administrator to keep their server secure and to send you the right code. An expert can download code from the server and check that it isn't doing anything malicious like leaking your encryption keys, which is why this is considered an active attack.
The platform is designed to minimize what data is exposed to its operators. User registration and account access is based on a cryptographic key that is derived from your username and password so the server never needs to see either and you don't need to worry about whether they are being stored securely. It is impossible to verify whether a server's operators are logging your IP or other activity, so if you consider this information sensitive it is safest to assume it is being recorded and access your preferred instance via Tor browser.
A correctly configured instance has safeguards to prevent collaborators from doing some nasty things like injecting scripts into collaborative documents or uploads. The project is actively maintained and bugs that our safeguards don't catch tend to get fixed quickly. For this reason it is best to only use instances that are running the most recent version, which is currently on a three-week release cycle. It is difficult for a non-expert to determine whether an instance is otherwise configured correctly, so we are actively working on allowing administrators to opt in to a public directory of servers that meet our strict criteria for safety.
Translations
CryptPad can be translated with nothing more than a web browser via our Weblate instance. More information about this can be found in our translation guide.
Contacting Us
You can reach members of the CryptPad development team on Twitter, via our GitHub issue tracker, on our Matrix channel, or by e-mail.
Team
CryptPad is actively developed by a team at XWiki SAS, a company that has been building Open-Source software since 2004 with contributors from around the world. Between 2015 and 2019 it was funded by a research grant from the French state through BPI France. In the years since we have been funded by NLnet PET, NGI TRUST, NGI DAPSI, subscribers of CryptPad.fr, and donations to our Open-Collective campaign.
Contributing
We love Open Source and we love contribution. Learn more about contributing.
If you have any questions or comments, or if you're interested in contributing to CryptPad, come say hi in our Matrix channel.
License
This software is and will always be available under the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. If you wish to use this technology in a proprietary product, please contact sales@xwiki.com.