OpenSSH is a widely used software suite that provides secure communication over a computer network. It implements the SSH (Secure Shell) protocol, which allows users to access and manage remote systems securely. OpenSSH encrypts data during transmission, protecting it from eavesdropping and other security threats. The suite includes various tools, such as ssh for secure remote login, scp for secure file transfers, and sftp for secure file access. OpenSSH is open-source, meaning its source code is freely available for anyone to use, modify, and distribute, promoting transparency and collaboration in software development.