Quertius is developing secure communication for the moment trust changes — when a device, person, role or situation can no longer be treated as fully trusted.
The Quertius product is privately published as a V0 build for controlled review. Public V1 remains gated pending implementation evidence, testing, external review and operational readiness.
Founder, technical and independent-review enquiries: hello@quertius.com
Control after a message is delivered - not just while it is being sent. Encryption protects a message while it is being sent; Quertius is designed to help control who should still be able to open protected information later.
Profiles, limited access modes, device controls and actions that remove future access are designed around the reality that trust can change.
Quertius can change whether protected information can still be opened inside the relevant message, conversation or profile. It cannot undo screenshots, external copies, information already seen or exposure from a fully compromised operating system.