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Copy protection for computer software, especially for games, has been a long cat-and-mouse struggle between publishers and crackers.These were (and are) programmers who defeated copy protection on software as a hobby, add their alias to the title screen, and then distribute the "cracked" product to the network of warez BBSes or Internet sites that specialized in distributing unauthorized ...
A DVD recorder receiving an analog signal featuring these pulses would detect them and display a message saying that the source is "copy-protected" followed by aborting the recording. VCRs, in turn, react to these excessive voltage pulses by compensating with their automatic gain control circuitry. This causes the recorded picture to wildly ...
Inserts a waveform into the non-picture Vertical Blanking Interval (VBI) of the analog video signal so compatible device can block or restrict recording when the waveform is detected. Spiradisc (Floppy Disk) Writes data on spiraling paths rather than in concentric circles. USB-Cops (USB-stick) Using a normal USB-stick as a key.
No one made such a recorder available. In 1992, Congress passed the Audio Home Recording Act. In this law, blank digital media (including DAT tapes and music CD-Rs) would be taxed, with the money going to the RIAA, and a new copy protection scheme, SCMS, would be enforced. Blank analog media, such as cassette tapes, were not subject to the tax.
The 2003 exemption on computer programs protected by dongles was renewed. The 2003 exemption on electronic books was renewed. A new exemption was made for sound recordings allowed after security flaws were found in a copy protection system on some Sony CDs; this was not renewed in 2010.
[5] [6] [7] For example, the device cannot be designed to copy; it must "frustrate attempts to defeat the content protection requirements"; [7] it must not transmit high definition protected video to non-HDCP receivers; and DVD-Audio works can be played only at CD-audio quality [7] by non-HDCP digital audio outputs (analog audio outputs have no ...
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