"OPTICAL: Secure comms ride Internet stealth channel"

A secret communications channel hidden beneath the noise floor of existing Internet public fiber-optic networks could serve as a conduit for uncrackable data transmission, electrical engineers from Princeton University said last week. Even the presence of data in the stealth channel is hidden; it's impossible to know that anything is being transmitted. At the Optical Society of America's annual meeting in Rochester, N.Y., the EEs reported on their design for a physical-layer modification that hides a secure communications channel amid the clamor of public traffic. The technique could cheaply retrofit the existing Internet with a mechanism for secure transmission of confidential and sensitive data, the researchers said.
Text: http://www.eetimes.com/showArticle.jhtml?articleID=193301461