SSH Communications Security | 8,110 followers on LinkedIn. Security software beyond the Secure Shell protocol | We are a European cybersecurity company that helps businesses secure critical data and communications between systems, automated applications, and people with defensive cybersecurity. Our solutions defend and safeguard business communications, business secrets, and access to them - now and in the future. SSH Communications Security is the market leader in developing advanced security solutions since 1995 when the company’s founder, Tatu Ylönen, invented the Secure Shell protocol, which soon became the gold standard for data-in-transit security.