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Microsoft Account (previously known as Microsoft Passport,〔(Microsoft Passport: Streamlining Commerce and Communication on the Web )〕 .NET Passport, Microsoft Passport Network, and Windows Live ID) is a single sign-on web service developed and provided by Microsoft that allows users to log into websites (like Outlook.com), devices (e.g. Windows 10 computers and tablets, or Windows Phones), and applications (including Visual Studio) using one account. ==History== Microsoft Passport, the predecessor to Windows Live ID, was originally positioned as a single sign-on service for all web commerce. Microsoft Passport had received much criticism. A prominent critic was Kim Cameron, the author of the Laws of Identity, who questioned Microsoft Passport in its violations of those laws. He has since become Microsoft's Chief Identity Architect and helped address those violations in the design of the Windows Live ID identity meta-system. As a consequence, Windows Live ID is not positioned as the single sign-on service for all web commerce, but as one choice of many among identity systems. In December 1999, Microsoft neglected to pay their annual $35 "passport.com" domain registration fee to Network Solutions. The oversight made Hotmail, which used the site for authentication, unavailable on Christmas Eve, December 24. A Linux consultant, Michael Chaney, paid it the next day (Christmas), hoping it would solve this issue with the downed site. The payment resulted in the site being available the next morning. In Autumn 2003, a similar good Samaritan helped Microsoft when they missed payment on the "hotmail.co.uk" address, although no downtime resulted. In 2001, the Electronic Frontier Foundation's staff attorney Deborah Pierce criticized Microsoft Passport as a potential threat to privacy after it was revealed that Microsoft would have full access to and usage of customer information.〔(Privacy terms revised for Microsoft Passport )〕 The privacy terms were quickly updated by Microsoft to allay customers' fears. In July and August 2001, the Electronic Privacy Information Center and a coalition of fourteen leading consumer groups filed (complaints ) with the Federal Trade Commission (FTC) alleging that the Microsoft Passport system violated Section 5 of the Federal Trade Commission Act (FTCA), which prohibits unfair or deceptive practices in trade.〔EPIC: Microsoft Passport Investigation Docket, http://epic.org/privacy/consumer/microsoft/passport.html〕 In 2003, Faisal Danka,〔(Faisal Danka )〕 a British Indian IT Risk and Security executive, revealed a serious flaw in Microsoft Passport, through which any account linked to Microsoft Passport or Hotmail could easily be cracked by using any common browser. Microsoft had pushed for non-Microsoft entities to create an Internet-wide unified-login system. Examples of sites that used Microsoft Passport were eBay and Monster.com, but in 2004 those agreements were cancelled.〔(Microsoft Passport Dumped By Ebay )〕 In August 2009, Expedia sent notice out stating they no longer support Microsoft Passport / Windows Live ID. In 2012, Windows Live ID was renamed Microsoft account.〔(Windows 8 Consumer Preview - FAQ )〕 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Microsoft account」の詳細全文を読む スポンサード リンク
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