Security

Traffic between devices is not encrypted. Anything you copy travels the local network in the clear, and any device on that network can read it. Use this only on networks you trust — your home or your office — and never on public or shared Wi-Fi.

What that means in practice

Clipboards carry passwords, tokens and private messages, often without the person copying them thinking about it. On an untrusted network, running this application turns every copy into a broadcast.

There is also no authentication: any device on the network that speaks the protocol can join the mesh and both receive your clipboard and write to it.

What the design does protect

• Nothing leaves the local network. There is no external server, no account and no telemetry. The application works with the internet disconnected.
• Nothing is stored. No clipboard history is written to disk.
• The source is public. Every line of what runs is at the repository.

Reasonable use

Treat it like an unencrypted file share on the same network: fine among your own machines behind your own router, wrong anywhere else.

If you need this over an untrusted network, put a VPN underneath it so the transport is encrypted by something else — but check that the VPN still allows mDNS between clients, or discovery will fail.