What is the function of Secure Shell (SSH)?

The function of Secure Shell (SSH) is to secure remote command line login and execution. SSH is a cryptographic network protocol that enables secure communication over an unsecured network. It provides a secure channel to connect to a remote machine, allowing users to execute commands and manage systems as if they were directly accessing the command line of that system. This is particularly essential for system administrators and technical users, as it ensures that both the data transmitted and the authentication process are encrypted, protecting against eavesdropping, man-in-the-middle attacks, and other security threats.

The technology is widely used for securely accessing servers, transferring files, and managing network infrastructure. Its ability to both encrypt communication and provide a secure authentication method (usually through the use of SSH key pairs) is what makes SSH a vital tool in cybersecurity practices, ensuring remote sessions remain confidential and integral.