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KeibiDrop

KeibiDrop

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Privacy & Anonymity File Transfer & Upload

About KeibiDrop

Share files between devices on demand. They show up as a folder on your computer, available instantly while downloading.

Platforms

Web Self-hosted

Languages

Go

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Website Source Code
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Published by
keibisoft
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README.md

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KeibiDrop

Website · Download · Blog

Share files between devices. They show up as a folder on your computer.

  • End-to-end encrypted (post-quantum). The relay cannot read your files.
  • On the same network, devices find each other automatically. One click to connect.
  • Over the internet, exchange fingerprints once. Save contacts for future sessions.
  • Peer files appear as a native folder (FUSE). Open, edit, git clone, anything.
  • Works through firewalls. Automatic fallback to an encrypted relay.
  • macOS, Linux, Windows. iOS and Android coming soon.
  • Open source (MPL-2.0).

KeibiDrop connection screen

Direct Transfer Virtual Folder (FUSE)
Direct transfer mode Virtual filesystem mode
Drag files in. Your peer saves what they need. Peer files appear as a folder. Open in any app.
Finder Terminal (git)
Shared files in Finder Git on FUSE mount

Install

macOS

brew tap keibisoft/keibidrop
brew install keibidrop

Linux (Debian/Ubuntu)

wget https://github.com/KeibiSoft/KeibiDrop/releases/latest/download/keibidrop_amd64.deb
sudo dpkg -i keibidrop_amd64.deb

Windows

choco install keibidrop

Or download from GitHub Releases.

Build from source

git clone https://github.com/KeibiSoft/KeibiDrop.git
cd KeibiDrop
make build-kd       # CLI daemon
make build-cli      # Interactive CLI
make build-rust     # Desktop UI (needs Rust + Slint)

Quick start

Same network (LAN):

  1. Both peers launch KeibiDrop
  2. Devices discover each other automatically
  3. One click to connect
  4. Share files

Over the internet:

  1. Both peers launch KeibiDrop
  2. Copy your fingerprint and send it to your peer (Signal, Telegram, anything)
  3. Paste each other's fingerprints and connect
  4. Share files

Save a peer as a contact to skip the fingerprint exchange next time. On the same network, saved contacts connect with one click using pseudonyms.

It works through firewalls automatically. If direct connection fails, KeibiDrop falls back to an encrypted relay. No port forwarding, no router configuration.

Two modes

Direct Transfer Virtual Folder (FUSE)
Speed Up to 550 MB/s Up to 250 MB/s
How it works Add files, peer pulls them Peer's files appear as a local folder
Setup Nothing extra Install macFUSE, fuse3, or WinFsp
Best for Sending large files Working on shared files, git repos

How it works

  1. Peers exchange fingerprints (or discover each other on LAN)
  2. KeibiDrop finds the fastest path: LAN, direct IPv6, or encrypted relay
  3. Files transfer over an encrypted channel the relay cannot read
  4. Keys rotate automatically for forward secrecy

The encryption is post-quantum (ML-KEM-1024 + X25519) with AES-256-GCM or ChaCha20-Poly1305. Full protocol details in Security.md.

Three interfaces

Desktop UI (Rust/Slint)

./keibidrop

Interactive CLI (terminal REPL)

./keibidrop-cli

Agent CLI (for scripts and AI agents, all output is JSON)

./kd start                           # Start daemon
./kd show fingerprint                # Get your fingerprint
./kd register <peer-fingerprint>     # Register peer
./kd create                          # Create room (or: kd join)
./kd add /path/to/file.zip           # Share a file
./kd list                            # List shared files
./kd pull file.zip ~/Downloads/      # Download a file

See docs/kd-agent-guide.md.

Configuration

KeibiDrop reads ~/.config/keibidrop/config.toml. Environment variables override the config.

Setting Env var Default
Relay server KD_RELAY https://keibidroprelay.keibisoft.com/
Bridge relay KD_BRIDGE bridge.keibisoft.com:26600
Save folder KD_SAVE_PATH ~/KeibiDrop/Received/
FUSE mount KD_MOUNT_PATH ~/KeibiDrop/Mount/
Inbound port KD_INBOUND_PORT 26431
Disable FUSE KD_NO_FUSE false
Security

Post-quantum hybrid key exchange prevents future quantum computers from decrypting recorded traffic. Forward secrecy via periodic re-keying limits exposure if a session key is ever compromised.

By default, identity is ephemeral: a fresh keypair each session, anonymous, unlinkable. For ease of use, you can save persistent identities encrypted with a per-install master key stored in the OS keychain (macOS Keychain Services, Linux Secret Service, Windows Credential Manager). Headless setups fall back to ~/.config/keibidrop/.master.key (mode 0600). Optional passphrase protection via Argon2id for users who back up config to the cloud.

Full protocol description: Security.md

Troubleshooting

See TROUBLESHOOTING.md.

Contributing

See CONTRIBUTING.md.

License

Go engine, CLI, and mobile bindings: Mozilla Public License 2.0 (per-file copyleft)

Rust UI and brand assets: Proprietary - see DUAL-LICENSE.md

Desktop UI built with Slint

Built by KeibiSoft SRL.

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