You don’t even need to install software or sign up to any website in order to use the file encryption service. Otr.to is an open-source peer-to-peer browser-based messaging application that offers secure communication by making use of “Off-the-Record” Messaging, a cryptographic protocol for encrypting instant messaging applications. The developers have added a new feature called, that helps users to share files encrypted with AES256 algorithm with anyone they want to communicate. When our friend will download the file once, it will automatically self-destruct.
Source: https://thehackernews.com/2015/05/secure-file-sharing.html