umapu02@cc.ic.ac.uk (D.A.G. Gillies Supvsr Dr K.J. Bignell) (12/13/90)
Greetings folks. I have been reading recently in Hi-Fi World (UK Mag.) about Sony's latest DAT recorder. It retails at 550 pounds sterling (ie about US$1100 ) which is fairly cheap. However there is a discussion of the SCMS ( I think) copy protection chipset and protocol that the record 'industries' insisted on introducing so that their multi-billion pound/dollar/yen aren't reduced by 0.000001 % . Anyway, does anyone know the precise details of this system, and what it does. I know a) it isn't the ghastly 'A-flat remover' that some android invented and nearly had adopted commercially and b) it allows one generation of copies to be made, but no more. This leads me to believe it must be altering the checksum in some way, but *before* the digital data (16-wide,bitstream, whatever) hits the DAC. Or is it a more subtle encryption ? Please email me at umapu02@cc.ic.ac.uk -- ___________________________________________________________________________ ----Saddam Hussein - nuke him 'till he glows, then shoot him in the dark--- ---(c) The Amazing Underwater Chocolate Christmas Cracker Motto Factory---- ---------------------------------------------------------------------------
bender@oobleck.Eng.Sun.COM (Michael Bender) (12/19/90)
In article <1990Dec13.132416.13905@cc.ic.ac.uk> umapu02@cc.ic.ac.uk (D.A.G. Gillies Supvsr Dr K.J. Bignell) writes:
->
-> Greetings folks. I have been reading recently in Hi-Fi World (UK Mag.) about Sony's
->latest DAT recorder. It retails at 550 pounds sterling (ie about US$1100 ) which is
->fairly cheap. However there is a discussion of the SCMS ( I think) copy protection
->chipset and protocol that the record 'industries' insisted on introducing so that
->their multi-billion pound/dollar/yen aren't reduced by 0.000001 % . Anyway, does
->anyone know the precise details of this system, and what it does. I know a) it isn't
->the ghastly 'A-flat remover' that some android invented and nearly had adopted
->commercially and b) it allows one generation of copies to be made, but no more. This
->leads me to believe it must be altering the checksum in some way, but *before* the
->digital data (16-wide,bitstream, whatever) hits the DAC. Or is it a more subtle
->encryption ? Please email me at umapu02@cc.ic.ac.uk
Hi, last month Bob Clements posted results of his tests with the SCMS, you
might try him at: clements@bbn.com.
mike
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