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Re: [ProgSoc] I want my MP3...
> Is this going to stop direct duplication of cd's anyway?? after all if you
> copy the encrypted data from one cd to another, isnt it going to decrypt
> the same way?
> Even if there is something put on the cds that traditional burners cant
> burn, Im sure there are a lot of music producers that like to create cds
> of their work, and of course they will want to do the encryption thing as
> well, so encryption burners will come out as a result of the demand for
On the hub of most CDs is a barcode which is printed and which is unique.
You can read the barcode but cannot write it. Blank CDs also have their own
unique barcodes which are read-only. So you key the encryption to the
barcode and the player reads the barcode first, then decrypts the music.
If the barcode changes, the CD won't decrypt.
A successful copy requires you to decrypt the original and either
 recrypt it to match the new barcode or  output in normal CD
format without encryption. Option  will be ruled out if players
are designed to demand encrypted music, option  can be difficult if
the players contain a public-key system which requires a matching private
key. If anyone buys a player with this included then they are stupid
for buying such a crippled device.
> As for changing the standard, this is fairly easily done.
Not if it makes the player incompatible with existing collections.
People will stick with what they have.
> Go back 10-20 years.. everyone was buying record and cassette.
> Now the record and cassette sections of record stores are very very small.
But people still have large existing collections, they will want to
play them. Also, CD was a jump ahead of other media in quality so
people wanted it, this will be a jump backwards.
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