HashChat

Presidential-grade anonymous messenger — SimpleX + Session architecture with Rust crypto core.

No phone numbers. No user IDs. No central servers. No logs. No metadata.

Core Design

• Random ed25519/x25519 keypair per profile (never reused)
• Unidirectional SMP queues (SimpleX style)
• Double-ratchet E2EE + extra HMAC-SHA512 layer
• Tor hidden service routing by default
• SQLCipher encrypted local storage (PRAGMA key='hashchat-secure-passphrase')
• Amnesic design — 2-click Panic Wipe (Rust secure erase + 3-pass shred)
• Storage capped to prevent DoS
• Full file transfer (any type, up to 1 GB, chunked + padded)

Security Features

• Constant-time crypto in Rust (ring + zeroize)
• Memory zeroization on every sensitive operation
• Extra per-message HMAC verification
• Yubikey-ready MFA hooks (closed for now)
• Dark mode only (Twitter/X palette)
• No light mode ever

Supported Platforms

• Fedora
• Debian
• Arch Linux
• Windows (via MSYS2)
• Android (native APK via cargo-ndk + Gradle)

Build Instructions

Fedora / Debian / Arch

cargo build --release
cabal build
python3 build.py