OpenSSH - Definition from the Hotspot Shield Glossary
This is a partial open-source utility bundle that is used for network security using the SSH protocol (Secure Shell). OpenSSH encrypts network traffic and provides tunneling options to ensure the security of data in a network environment.
While OpenSSH is not truly an open-source utility (As the SSH software it uses is proprietary) it can be modified and licensed. OpenSSH is mainly used for remote login sessions using SSH, and secures the traffic to avoid eavesdropping and other forms of connection attacks. The utility is formed of many different individual tools as opposed to one single piece of software, these include - SSH, SFTP, SSHD, SFTP-Server, SSH-Agent and key management tools like SSH-Add.