专利名称：USING SOCIAL INFORMATION FOR
AUTHENTICATING A USER SESSION
发明人：SHEPARD, Luke Jonathan,CHEN,
William,PERRY, Todd,POPOV, Lev
申请号：EP10749151.6申请日：20100301公开号：EP2404233A1公开日：20120111
摘要：A social CAPTCHA is presented to authenticate a member of the social network.The social CAPTCHA includes one or more challenge questions based on informationavailable in the social network, such as the user's activities and/or connections in thesocial network. The social information selected for the social CAPTCHA may bedetermined based on affinity scores associated with the member's connections, so thatthe challenge question relates to information that the user is more likely to be familiarwith. A degree of difficulty of challenge questions may be determined and used forselecting the CAPTCHA based on a degree of suspicion.
申请人：Facebook, Inc.
地址：1601 South California Avenue Palo Alto, CA 94304 US
国籍：US
代理机构：Collins, John David
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