Binsheng Liu

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SaaS (Software as a Service) deliver software as a service over the Internet, eliminating the need to install and run the application on the customers' own computers and simplifying maintenance and support. Access control is an important information security mechanism, according to user identity and the attribution of a predefined group of users to restrict(More)
Verification code technology is designed to distinguish humans from computers using distorted letters and/or numbers, to protect websites from machine attacking. The current verification code technology faces a problem: too simple to prevent an attacking machine to recognize automatically, or too complex for a human user. It will be hard for us to decide(More)
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