Like us, almost all the tools we recommend are free, open-source, and where appropriate, end-to-end encrypted.</li> </ul> Responsible disclosure policy <p>We take the safety and security of our users extremely seriously. If you find a security critical issue with Umbrella or any other activity related to Security First’s work, we ask that you disclose it to us confidentially before making it public. Ideally, please use security measures such as encryption to mail us.