Piknik is an encrypted clipboard relay and multiplexer that coordinates the sharing of text, binary data, and shell content across multiple network hosts. It utilizes a centralized relay architecture to manage secure client connections, providing an end-to-end encrypted system for synchronizing session state and data streams.
The project distinguishes itself through the use of multi-stage key derivation and API key access control to secure remote shell access. It employs end-to-end encryption and digital signatures to protect relayed content, ensuring that data is encrypted at the source before transmission to the hub.
The system covers cross-host clipboard sharing, including the transfer of compressed directory archives and real-time data streaming. It further provides shell content management for storing and retrieving terminal input, as well as system integration for detecting interactive terminal attachments and inspecting clipboard status via system signals.