Cross-signed device verification for secure communication.
What is cross-signed device verification?
Topsecret uses cross-signed device verification to help ensure the identity of conversation participants and their devices, with minimal manual effort.
What are the benefits of cross-signed device verification?
Device verification guards against imposters and other bad actors attempting ‘man-in-the-middle’ style attacks.
Topsecret lets you keep track of every device that has joined an encrypted conversation. If a new and unexpected device joins, you can use device verification to check that it's the right person. If you suspect that a trusted device has fallen into the wrong hands, you can revoke that trust and remove its access to the ongoing encrypted conversation.
How does cross-signed device verification work?
A user can access their Topsecret account through multiple devices.
Cross-signed device verification is a smart way for the user to verify all the devices they have linked to their Topsecret account. Having done that, the process of verifying with others is far easier.
When one user verifies another, that trust is extended across all the devices the users have linked to their respective Topsecret accounts (saving the hassle of having to verify a contact's multiple devices).
Whether self-verifying, or verifying others' devices, the actual authentication process is wonderfully straight-forward. Users simply compare on-screen emojis, or scan a QR code.
Default end-to-end encryption.
Topsecret uses Double Ratchet end-to-end encryption by default to protect users’ privacy.
Explore Topsecret’s unique features.
Built on Matrix
Matrix is an open network for secure, decentralised communication, connecting 80M+ users over 80K+ deployments.
Governed by The Matrix.org Foundation, the Matrix protocol is an open standard with open source implementations, supporting a vibrant developer ecosystem. Topsecret was founded by the team behind Matrix as a way to bring it to the mainstream.
