Messtar

Messtar is a custom, lightweight encryption protocol written in Rust, designed for secure end-to-end data transmission. It ensures confidentiality, integrity, and mutual authentication.

Features

• Key Exchange: X25519 Diffie-Hellman for perfect forward secrecy
• Key Derivation: HKDF-SHA256
• Encryption: AES-256-GCM
• Authentication: Ed25519 mutual identity verification during handshake
• Security: Replay attack protection, strict packet freshness, and automatic key ratcheting
• Transport: Optional async TCP layer built on tokio and postcard

Installation

[dependencies]

# Core protocol

messtar = "0.4.2"



# With async TCP transport layer

messtar = { version = "0.4.2", features = ["transport"] }