Dropbox protects files in transit between our apps and our servers, and at rest. Each file is split into discrete blocks, which are encrypted using a strong cipher. Only blocks that have been modified are synced.
We regularly test our infrastructure and apps to identify and patch vulnerabilities. We also work with third-party specialists, industry security teams, and the security research community to keep our users and their files safe. Potential security bugs and vulnerabilities can be reported to us on the third-party service HackerOne.
Dropbox has terms and guidelines for third-party developers to create apps that connect to Dropbox while respecting user privacy and account security. In addition, Dropbox use OAuth, an industry-standard protocol for authorization, to allow users to grant apps different levels of account access without exposing their account credentials.
To Learn More about Dropbox for Business Security please Click Here to access the Dropbox Security White Paper.