Cybersecurity software company Cog has raised $3.5 million in Series A funding from private investment company Grok Ventures (Atlassian founder and CEO Mike Cannon-Brookes’ investment vehicle) and Australian tech venture fund rampersand.

Cog’s pilot product, the D4 Secure Mobile device, is a reference design that runs on the HTC One A9. The U.S. Department of Defense has acquired the first round of commercially available devices for their own internal use, said the company in a statement.

Cog was launched in 2014 by Dr. Daniel Potts, a former Northrop Grumman and OK Labs engineer, and a member of Australian Prime Minister Malcolm Turnbull’s Cybersecurity Roundtable. The company is expanding geographically to San Francisco, alongside current locations in Sydney and Chicago.

[Image courtesy: Cog]