Mocana, a San Francisco, Calif. startup that makes security software for non-PC devices like PDAs and DVRs, has raised $7 million in its second round of venture funding.

The company’s software, called the Device Security Framework, attempts to secure communications passing over a network from any device, not just computers.

Southern Cross Venture Partners led the round, with participation from Shasta Ventures. Mocana previously took $3.5 million in its first round; to date, it has raised a total of $12.1 million.