<span>Hello,</span><div><br></div><div><span>I would like to share my new white paper for community discussion and feedback.</span></div><div><br></div><div><span>Title: GhostLine: A Multi-Participant One-Time Pad Chat System with Information-Theoretic Authentication</span></div><div><br></div><div><span>Abstract: We present GhostLine, the first practical multi-participant chat system achieving
both perfect secrecy via one-time pad (OTP) encryption and information-theoretic
authentication via the Wegman–Carter construction. Unlike existing secure messaging
protocols that rely on computational assumptions, our system provides unconditional security guarantees that remain valid against quantum adversaries. We implement a novel
state synchronization mechanism for multi-party OTP consumption and demonstrate
a complete working system in Rust. Our analysis identifies critical implementation
challenges in OTP-based group communication and provides formal security proofs
for our construction. The system represents the first open-source, multi-participant
implementation combining Shannon-perfect secrecy with information-theoretic message
authentication.</span></div><div><br></div><div><span>Key Contributions:</span></div><div><span>- First open-source, multi-participant implementation combining Shannon-perfect secrecy with information-theoretic message authentication</span></div><div><span>- Novel protocol preventing state desynchronization attacks in multi-party OTP settings  </span></div><div><span>- Formal security proofs and analysis of critical implementation challenges</span></div><div><br></div><div><span>The paper is available here: <a target="_blank" rel="noreferrer nofollow noopener" href="https://enkryp.duckdns.org/view/whitepaper">https://enkryp.duckdns.org/view/whitepaper</a></span></div><div><span>PGP signature for verification: <a target="_blank" rel="noreferrer nofollow noopener" href="https://enkryp.duckdns.org/download/pgp-signature">https://enkryp.duckdns.org/download/pgp-signature</a></span></div><div><span>Source code repository: <a target="_blank" rel="noreferrer nofollow noopener" href="https://app.radicle.xyz/nodes/ash.radicle.garden/rad:z9NtUTymSdxnuTcnzaM5qi7cuHPN">https://app.radicle.xyz/nodes/ash.radicle.garden/rad:z9NtUTymSdxnuTcnzaM5qi7cuHPN</a></span></div><div><br></div><div><span>I welcome any feedback, cryptographic analysis, or discussion on the approach.</span></div><div><br></div><div><span>Sincerely,</span></div><div><br></div><div><span>Hitokiri Battosai</span></div><span>Independent Researcher</span><br>