International Business Machines Corporation

Nicolas E Poore

Robert Charles Leah

Ami H Dewar

Peter C Yim

Jason T Clark

A server to implement human response tests of graduated difficulty can suppress access by spambots. The server includes a network interface and a test controller. The network interface connects the server to a network and facilitates electronic communications between the server and a client computer coupled to the network. The test controller is coupled to the network interface. The test controller implements a human response test with a level of difficulty on the client computer in response to an access request by the client computer. The level of difficulty of the human response test is dependent on a determination whether the access request is deemed to originate from a spambot.

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Durham, NC, United States of America

Nicolas E Poore