Panthera Mail Protocol V1
Private Encrypted Mail Service.
Mail sealed on your device with hybrid post-quantum encryption. The server stores envelopes it cannot read.
Hybrid post-quantum keys
Every envelope uses X-Wing: ML-KEM-768 combined with X25519.
Dual signatures
Ed25519 and ML-DSA-65 must both verify, or the mail is rejected.
Subjects encrypted too
Subject, body, recipients and attachments are sealed on your device.
Bcc stays hidden
Each recipient gets an independent envelope. No shared recipient list.
Key transparency
Every key is recorded in a tamper-evident log that correspondents check for each other.
Forward secrecy
One-time keys are destroyed after use, so intercepted mail stays sealed.