发明名称 |
ANTI-PIRACY FEATURE FOR OPTICAL DISCS |
摘要 |
Disclosed are techniques and systems for manufacturing an optical disc having a stochastic (i.e., non-deterministic) anti-piracy feature in the form of a multi-spiral structure, and for verifying the feature on the optical disc to authenticate the disc for playback. The multi-spiral structure may be comprised of multiple partially interleaved, and partially overlapping, spiral data tracks formed in a designated area of the optical disc. A process of forming the multi-spiral structure may include forming, in the designated area, a first spiral data track with first track pitch and a second spiral data track with second track pitch that is different than the first track pitch. The multi-spiral structure may be analyzed to determine verification parameters for verifying the multi-spiral structure, and those verification parameters may be encrypted so that they may be subsequently decrypted and used to verify the multi-spiral structure on a disc reading device. |
申请公布号 |
US2016093324(A1) |
申请公布日期 |
2016.03.31 |
申请号 |
US201414502390 |
申请日期 |
2014.09.30 |
申请人 |
Microsoft Corporation |
发明人 |
Domke Felix;McGrail Kenneth M |
分类号 |
G11B20/00 |
主分类号 |
G11B20/00 |
代理机构 |
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代理人 |
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主权项 |
1. A computer-implemented method comprising:
accessing encrypted data for verifying a multi-spiral structure on a portion of an optical disc, the multi-spiral structure comprising partially interleaved, and partially overlapping, spiral data tracks having different track pitches; decrypting the encrypted data to obtain verification parameters; determining whether characteristics of the multi-spiral structure correspond to the verification parameters; and authenticating the optical disc in response to verifying the characteristics of the multi-spiral structure, the characteristics of the multi-spiral structure being verified based on the characteristics of the multi-spiral structure corresponding to the verification parameters. |
地址 |
Redmond WA US |