Invention Grant
US08196198B1 Access using images 有权
访问使用图像

Access using images
Abstract:
A computer-implemented method may include presenting to a user multiple images, multiple identifiers and a challenge to select one of the identifiers for each of the images, receiving the selected identifiers from the user, and providing access to a computing service based on a comparison of the selected identifiers to an answer to the challenge.
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