Most messaging systems are account systems first and cryptosystems second.

I've been working on a prototype: https://aq-message.web.app

AQ is an experiment in removing accounts entirely.

There are no usernames, phone numbers, or platform identity objects. Instead, each relationship maintains its own evolving continuity chain. A message is accepted only if it cryptographically advances that chain according to deterministic rules.

The relay is untrusted by design. It stores ciphertext under per-relationship mailboxes. It can observe timing and volume, but it cannot decrypt content or produce forged messages that would be admitted by recipients.

Notable properties: • No global identity namespace • No server-issued credentials • Pairwise continuity instead of platform authentication • Deterministic replay and fork handling • Explicit recovery triggers on continuity gaps • No claim of metadata anonymity

This is a prototype, not a polished product.

I’d appreciate scrutiny on the protocol mechanics and threat model.

Technical overview: https://aq-message.web.app/technical-overview