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: SIVACRACY .NET"Frequency Hopping"
By Siva Vaidhyanathan
That's the name of a new play about Hedy Lamarr. Scientific American reports:
Hedy Lamarr wasn't just a beautiful movie star. According to a new play, Frequency Hopping, she was also a shrewd inventor who devised a signal technology that millions of people use every day.
Lamarr?born Hedwig Eva Maria Kiesler in Austria in 1914?developed a passion for helping the U.S. military after walking away from an unhappy marriage to an Austrian Fascist weapons manufacturer in 1937. In an attempt to stall her acting career, he had brought her to his business meetings, where she found herself continuously listening to "fat bastards argue antiaircraft this, vacuum tube that," explains Lamarr's character?played by Erica Newhouse?in the play, Frequency Hopping. In the meetings, they had talked about developing detection devices to listen to, and jam, the radio signals that American aircraft and weapons used to communicate with one another; and Lamarr wanted to foil their plans. "Can you guide your torpedo towards an enemy target?or just use radio control period?without being detected? Or jammed?" Lamarr's character asks.
Lamarr realized that by transmitting radio signals along rapidly changing, or "hopping," frequencies, American radio-guided weapons would be far more resilient to detection and jamming. The sequence of frequencies would be known by both the transmitter and receiver ahead of time, but to the German detectors their message would seem like gibberish. "No jammer could detect it, no German code-breaker could decipher a completely random code," she says in the play. ...
Full post as published by SIVACRACY .NET on June 04, 2008 (boomark / email).

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