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Cyber Crime

Firm sees growing market for building shields

Firm sees growing market for building shields

It looks like an entirely ordinary conference room — white walls, rectangular table, window overlooking a parking lot. But an Owings Mills company has shielded the space with a kind of electromagnetic invisibility cloak designed to protect it against hackers.

Electronic devices such as printers, cellphones and computers all leak signals — not just Wi-Fi but other telltale emissions — that hackers can use to access corporate networks or gain information about company operations.

But this room traps many of those emissions. The walls are lined with a heavy, tear-resistant foil and the windows are coated with a special film manufactured from more than 20...

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