[](https://labs.xwiki.com/xwiki/bin/view/Main/WebHome)
Unity is Strength - Collaboration is Key
CryptPad is the **zero knowledge** realtime collaborative editor.
Encryption carried out in your web browser protects the data from the server, the cloud
and the NSA. This project uses the [CKEditor] Visual Editor and the [ChainPad] realtime
engine. The secret key is stored in the URL [fragment identifier] which is never sent to
the server but is available to javascript so by sharing the URL, you give authorization
to others who want to participate.
# Installation
Cryptpad depends on the Nodejs runtime.
We recommend installing it via [NVM](https://github.com/creationix/nvm "Node Version Manager") to ensure that you are running an up to date version.
Once you have a recent runtime:
```
git clone
cd cryptpad
npm install
npm install -g bower ## if necessary
bower install
## copy config.js.dist to config.js
cp config.js.dist config.js
## modify configuration to use your own mongodb instance
## for example aon the default mongodb port `mongodb://localhost:27017/demo_database`
$EDITOR config.js
node ./server.js
```
## Maintenance
To get access to the most recent codebase:
```
cd /your/cryptpad/instance/location;
git pull
```
To update dependencies:
```
# clientside dependencies
bower update;
# serverside dependencies
npm update;
```
To reset your instance of Cryptpad and remove all the data that is being stored:
If you are using the leveldb adaptor, this is as simple as deleting the folder which contains your leveldb datastore:
```
# change into your cryptpade directory
cd /your/cryptpad/instance/location;
# delete the datastore
rm -rf ./cryptpad.db
```
If you are using the mongodb adaptor, [drop the relevant collection](https://docs.mongodb.org/manual/reference/method/db.collection.drop/#db.collection.drop).
## Testing
To test CryptPad, go to http://your.server:3000/assert/
You can use WebDriver to run this test automatically by running TestSelenium.js but you will need chromedriver installed.
If you use Mac, you can `brew install chromedriver`.
# Setup using Docker
See [Cryptpad-Docker](cryptpad-docker.md)
## Security
CryptPad is *private*, not *anonymous*. Privacy protects your data, anonymity protects you.
As such, it is possible for a collaborator on the pad to include some silly/ugly/nasty things
in a CryptPad such as an image which reveals your IP address when your browser automatically
loads it or a script which plays Rick Astleys's greatest hits. It is possible for anyone
who does not have the key to be able to change anything in the pad or add anything, even the
server, however the clients will notice this because the content hashes in ChainPad will fail to
validate.
The server does have a certain power, it can send you evil javascript which does the wrong
thing (leaks the key or the data back to the server or to someone else). This is however an
[active attack] which makes it detectable. The NSA really hates doing these because they might
get caught and laughed at and humiliated in front of the whole world (again). If you're making
the NSA mad enough for them to use an active attack against you, Great Success Highfive, now take
the battery out of your computer before it spawns Agent Smith.
Still there are other low-lives in the world so using CryptPad over HTTPS is probably a good idea.
## Translations
We'd like to make it easy for more people to use encryption in their routine activities.
As such, we've tried to make language-specific parts of Cryptpad translatable. If you're
able to translate Cryptpad's interface, and would like to help, please contact us!
You can also see [our translation guide](/customize.dist/translations/README.md).
## Contacting Us
You can reach members of the Cryptpad development team on [twitter](https://twitter.com/cryptpad),
via our [github issue tracker](https://github.com/xwiki-labs/cryptpad/issues/), on the
[freenode](http://webchat.freenode.net/?channels=%23cryptpad&uio=MT1mYWxzZSY5PXRydWUmMTE9Mjg3JjE1PXRydWUe7)
irc network, or by [email](mailto:research@xwiki.com).
## Contributing
We love Open Source and we love contribution. It is our intent to keep this project available
under the AGPL license forever but in order to finance more development on this and other FOSS
projects, we also wish to sell other licenses to this software. Before making a pull request,
please read and
[sign the Commons Management Agreement](https://www.clahub.com/agreements/cjdelisle/cryptpad).
If you have any questions or comments, or if you're interested in contributing to Cryptpad, come say hi on IRC, `#cryptpad` on Freenode.
### 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
* Icons thanks to http://www.famfamfam.com/ licensed [Creative Commons Attribution 2.5 License]
[ChainPad]: https://github.com/xwiki-contrib/chainpad
[CKEditor]: http://ckeditor.com/
[fragment identifier]: https://en.wikipedia.org/wiki/Fragment_identifier
[active attack]: https://en.wikipedia.org/wiki/Attack_(computing)#Types_of_attacks
[Creative Commons Attribution 2.5 License]: http://creativecommons.org/licenses/by/2.5/