E Mail That Won't Come Back To Haunt You

New programs allow users to erase the electronic trail

John Blumenthal was disappointed with the Japanese team that was helping him encrypt and secure electronic transactions for a Tokyo bank in 1996. So he groused to his American partner via e-mail. Out of mischief or lack of sleep, his partner forwarded the note to the Japanese and copied the author. Two weeks later, when Blumenthal flew to Tokyo, the reception was less than cordial. "I wasn't exactly treated to a night on the Ginza," he recalls.

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