In an attempt to nudge its significant merchant base to conduct secure transactions over the Internet, American Express Co. has teamed with Hewlett-Packard to bring ExpressVault, an end-to-end electronic commerce (EC) solution, to market.

The solution joins the marketing and financial expertise of Amex with the computing and security technologies of HP. It will be offered to Amex's merchant base through Internet service providers (ISPs) such as Mindspring Enterprises Inc. and EarthLink Network Inc. Merchants pay ISPs between $250 to $350 per month for the program.

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