schollz/croc

Magic-wormhole is a peer-to-peer file transfer tool used to send files, directories, and text strings between computers. It functions as a secure data relay that establishes ephemeral encrypted network tunnels for ad hoc data exchange without requiring permanent accounts or shared folders. The system utilizes a password-authenticated key exchange to establish a shared secret from a short, human-readable code. This single-use secret handshake ensures the connection is invalidated after a successful pair to prevent replay attacks, while a rendezvous server helps peers exchange connection detail

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 befo

Send is an end-to-end encrypted file sharing service that encrypts files on the sender's device before upload, ensuring the server never sees plaintext content. It generates secure download links that are designed for single use, automatically removing access after the first successful download, and associates each share with a time-limited access token that expires after a set duration. The service operates without requiring user accounts, lowering friction for ephemeral sharing, and uses cryptographic key derivation to generate decryption keys from the download URL, eliminating server-side

LocalSend is a cross-platform utility designed for secure, peer-to-peer file transfers between devices on the same local network. By establishing direct, encrypted communication channels, the application enables users to share files without relying on external servers, cloud storage, or active internet connectivity. The project distinguishes itself through a unified codebase that supports native-looking interfaces across desktop and mobile operating systems. It utilizes automated peer discovery to identify available devices on a subnet and employs end-to-end encryption to ensure data integrit