Every now and then designers face the need to extend the lifespan of an existing embedded system by adding more compute power or additional inputs (or both). This is a job for which having a programmable system platform really helps.

In our case, we wanted to upgrade a networked programmable system with secure Internet connectivity. Secure Internet connectivity requires encryption to run protocols such as Secure Shell (SSH), Transport Layer Security (TLS), Secure Sockets Layer (SSL) or virtual private network (VPN). This need for security is growing in pace with the demand to connect all manner of systems to the Internet to enable remote administration and distributed control systems, for example.