Access control for a resource

专利名称：Access control for a resource发明人：Robert Rowlingson申请号：US15120566申请日：20150305公开号：US10395022B2公开日：20190827

专利附图：

摘要：An access controller comprising: a data store storing: a challenge imageincluding a user challenge; a mask image including a mask; a composite image generatorto superimpose the challenge image and the mask image as a dynamic composite imagesuch that the user challenge is partially masked by the mask in the composite image; and

a display to display the dynamic composite image to a user; a user input receiver, whereinthe access controller grants access to the resource on receipt, via the user input receiver,of a correct response by a user to the challenge, wherein the user challenge is at least70% masked by the mask, wherein the user challenge is indistinguishable from the maskat boundaries between the user challenge and the mask in the composite image, andwherein the composite image is dynamic by the mask randomly moving in the compositeimage periodically.

申请人：British Telecommunications Public Limited Company

地址：London GB

国籍：GB

代理机构：Patterson Thuente Pedersen, PA

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