Mask based challenge response test
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United States of America Patent
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May 30, 2017
Grant Date -
Apr 25, 2013
app pub date -
Jun 24, 2011
filing date -
Jun 28, 2010
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Abstract
Providing a challenge response test associated with a computer resource includes generating a challenge response test image including providing a first substantially well-formed image, including a first masked image having a visible portion entirely composed of portions of a first well-formed image, and a first plurality of image elements; and providing at least one ill-formed image, each at least one ill-formed image including a second masked image having at least one first ill-formed portion.
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