Nowadays, lots of users are concerned about the safety of their confidential data when it comes to online collaboration. And their concerns are fully justified. So we at ONLYOFFICE, an open-source project with the focus on advanced and secure document processing, do our best to provide a comprehensive level of security for online doc editing and collaboration. With GDPR compliant ONLYOFFICE Docs, you get a wide range of security tools and services to protect yourself from unauthorized access, data leaks, or insider actions. Self-hosted ONLYOFFICE can be installed on your own private server, so all your data always stays ‘in-house.’ The server level of data protection is implemented, among other things, with JSON Web Token and configurable cache lifetime. Important is, that no user data is stored on the ONLYOFFICE server. Besides, there are additional security features such as restriction on copying, downloading and printing, watermarking, flexible document permissions, etc. The same applies to the integration of ONLYOFFICE Docs with other open-source services and platforms so that users of the combined solutions also get secure document editing and co-authoring.