PostGuard

PostGuard offers end-to-end encryption (E2EE) to increase the security of email and file sharing. It uses Identity-Based Encryption (IBE), which is a type of encryption that is easier to use than traditional public-key encryption. To decrypt and read encrypted emails and files, recipients only needs to prove that they really are the intended recipient. This is done with the authentication app Yivi, which is free, easy-to-use and privacy-friendly.