usenix_logo_notag_white
Sign In
Conferences
Attend
Registration Information
Student Grant Application
Diversity Grant Application
Grants for Black Computer Science Students Application
Program
Technical Sessions
Summer Accepted Papers
Fall Accepted Papers
Participate
Call for Papers
Submission Policies and Instructions
Call for Artifacts
Artifact Evaluation Information
Instructions for Presenters
Hack@Sec
Sponsors
Sponsor Events
Sponsor and Exhibitor Info
About
Symposium Organizers
Past Symposia
Conference Policies
Code of Conduct
Questions
Shudong Zhang
Linked Presentation:
Research on the Security of Visual Reasoning CAPTCHA
