| 摘要 |
This document describes image-based human interactive proofs (HIPs). In some cases these proofs may be used when a browser at a client is used to access resources from a web server. Before access to the resources is enabled, the client can be challenged by the web server with an image-based puzzle. The image-based puzzle is configured to enable distinctions to be made between human input and non-human input. Input to answer the image-based puzzle can be formed via the client and communicated to the web server. The web server receives the input from the client and selectively enables client access to the resources based upon the input. In at least some embodiments, the web server can make use of a community database that stores client answers to image-based puzzles to assist in distinguishing between human input and non-human input. |
