Dotsig - Digital signatures on the fly

A secure, local, offline, end-to-end encrypted messaging for private communication.

Built with Go, it features BIP32 hierarchical key derivation, ECDH key agreements, and AES-256 encryption and uses a custom YAML-based file format for profiles, contacts and messages.

Features

• End-to-End Encryption: Messages encrypted with recipient’s public key, decryptable only with their private key
• Secure Key Management: BIP32 hierarchical key derivation from BIP39 mnemonics
• Three-Step Handshakes: Agree → Accept → Finalize workflow for establishing secure contacts
• Forward Secrecy: Unique ephemeral key per message
• Multi-Machine Support: Decrypt messages on any machine with the same profile/password
• Per-Profile Security: Salted PBKDF2 hashing prevents profile linking
• Contact Management: Track handshake identities with public key verification

Installation

Requirements: Go 1.21 or later

# Clone the repository
git clone https://github.com/resoftware-org/go-accord.git
cd go-accord

# Build
go build -o go-accord

# Verify
./go-accord --help

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