Digital cash, an idea that helped focus bankers' and regulators' attention on the commercial possibilities of the Internet, has yet to answer many questions about its own viability, a bank technologist said last week.

With most on-line consumer transactions being done by credit card, electronic money alternatives like Mondex or Digicash Inc.'s eCash are "still struggling," Citibank vice president Dan Schutzer told the American Banker Future Money conference in Philadelphia.

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