Market research group Gartner is advising businesses using Microsoft's Passport authentication service to pull the plug on it. The move is a response to a serious security flaw discovered May 7 that placed at risk the identities of roughly 200 million users of the online single-sign-on user-identity service.
Passport is used by customers to log on to E-commerce sites, E-mail, and instant-messaging accounts. Microsoft says Passport is a critical part of its vision for Web services and E-commerce.
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