摘要:
A method for fabricating read-only copy protected optical medium comprising: a substrate (54) having information pits (18) and lands (16) thereon and a light sensitive material (56) placed at a position capable of altering the data reading during copying of the optical medium but permitting read of the underlying data in the reading of the optical medium.
摘要:
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.
摘要:
The invention includes both methods for authenticating optical storage media and methods for providing means for authenticating optical storage media actually on the optical recording medium. One of the methods for providing authentication means metalizes a portion of the optical recording medium (36), followed by spin coating the previously uncoated portion of the recording medium with an optical state changing security material (34), followed by overcoating this with a reflective layer (34). Correctable or uncorrectable errors may be placed in predetermined areas of the medium and the presence of these detected to authenticate the optical recording medium and distinguish it from an unauthorized duplicate or copy.