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HTTP+HTML form-based authentication, typically presently colloquially referred to as simply form-based authentication, is a technique whereby a website uses a web form to collect, and subsequently authenticate, credential information from a user agent, typically a web browser. (Note that the phrase "form-based authentication" is ambiguous. See form-based authentication for further explanation.) == Interaction summary == The steps of the technique are: * An unauthenticated user agent requests a web page from a website, via the HTTP protocol. * The website returns an HTML web page to the unauthenticated user agent. The web page consists minimally of an HTML-based web form which prompts the user for their username and password, along with a button labeled "login" or "submit". * The user fills in his username and password, and then presses the submit button. * The user agent sends the web form data (which includes the username and password) to the web server. * The website implementation, running on the web server, performs some verification and validation operations on the web-form data. If successful, the website considers the user agent to be authenticated. 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「HTTP+HTML form-based authentication」の詳細全文を読む スポンサード リンク
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