[Cryptography] New White Paper: GhostLine - Information-Theoretically Secure Multi-Party Chat

[Ferecides de Siros]

Hello,

I would like to share my new white paper for community discussion and feedback.

Title: GhostLine: A Multi-Participant One-Time Pad Chat System with Information-Theoretic Authentication

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.

Key Contributions:
- First open-source, multi-participant implementation combining Shannon-perfect secrecy with information-theoretic message authentication
- Novel protocol preventing state desynchronization attacks in multi-party OTP settings
- Formal security proofs and analysis of critical implementation challenges

The paper is available here: https://enkryp.duckdns.org/view/whitepaper
PGP signature for verification: https://enkryp.duckdns.org/download/pgp-signature
Source code repository: https://app.radicle.xyz/nodes/ash.radicle.garden/rad:z9NtUTymSdxnuTcnzaM5qi7cuHPN

I welcome any feedback, cryptographic analysis, or discussion on the approach.

Sincerely,

Hitokiri BattosaiIndependent Researcher
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