Core51 is a corporate messenger for day to day work: decisions, approvals, handoffs, and sensitive discussions. End to end encryption protects confidentiality by default: messages are encrypted on device and the server is treated as untrusted. Only participants can read the content. And if something goes off plan, conversations can be exported with verifiable proof suitable for arbitration, audits, and disputes.
Messages are encrypted on device. The server stores ciphertext and delivery metadata.
TOFU model: keys are pinned on first contact, and changes require explicit re trust.
Security relevant events can be reviewed, including key changes and verification checks.
Export a conversation for an arbitrator or notary. Verification is performed offline.
Proofs are designed to detect tampering and selective omission within the supported model.
A verifier tool will be published to validate exports: signatures, commitments, and chain integrity.
APK link coming soon.
App Store link coming soon.
Open source verifier coming soon.
