The foundation for sovereign digital communication.
Siegelkern is a use-case-neutral core for cryptographic identity and secure rooms: accounts, devices, recovery, organizations, key transparency, and end-to-end encrypted rooms over MLS. Messaging, collaboration, event streaming or a citizen portal build on it — Siegelkern carries the event, and the application decides what it means.
- Confidential — the operator delivers; only the members read.
- Verifiable — every event names its sender, and everyone sees what that identity rests on, from a self-declared name to an EUDI Wallet credential.
- Self-determined — every admission is signed and visible to all members.
MLS (RFC 9420), Key Transparency (IETF draft), post-quantum hybrid key exchange with ML-KEM, and composite signatures with ML-DSA.
A Schwarz Digits project.
Contact: siegelkern@digits.schwarz · Security: see our security policy.
