MATERIALS FOR OPTICAL MEDIUM COPY-PROTECTION TRANSIENTLY REACTING TO A READER BEAM
申请人:SELINFREUND H. Richard
公开号:US20080062838A1
公开(公告)日:2008-03-13
A method and system for providing copy-protected optical medium using transient optical state change security materials capable of changing optical state and software code to detect such change in optical state.