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How does DVD CSS/CPPM protection actually work?
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When I try to burn a DVD with ImgBurn I get a message that the disc is copy protected:
Copyright protection system type: CSS/CPPM
I've been trying to Google on how this protection actually works, all I could find is that there's some secret sectors on the cd that are used for decryption of the data.
However I'm wondering - how is this enforced (someone has to "know" that those sectors should be read by the secret decryption key) - is this some sort of specification on the DVD drive? or perhaps some specification that the operating system "knows" about and therefor decrypts the data successfully?
dvd copy-protection disk-protection
edited 1 hour ago
Mooseman
77131129
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
add a comment |
When I try to burn a DVD with ImgBurn I get a message that the disc is copy protected:
Copyright protection system type: CSS/CPPM
I've been trying to Google on how this protection actually works, all I could find is that there's some secret sectors on the cd that are used for decryption of the data.
However I'm wondering - how is this enforced (someone has to "know" that those sectors should be read by the secret decryption key) - is this some sort of specification on the DVD drive? or perhaps some specification that the operating system "knows" about and therefor decrypts the data successfully?
dvd copy-protection disk-protection
edited 1 hour ago
Mooseman
77131129
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
1
en.wikipedia.org/wiki/Content_Scramble_System ! I remember the controversy when the decryption program was leaked, and its distribution is still legally questionable in many places.
– pjc50
Dec 14 '18 at 10:02
@pjc50 - After reading that Wikipedia now I understand that the drive enforces the encryption. I just didn't manage to find the correct Wikipedia until you posted it.. so Please post it as an answer and I'll accept it. Thank you.
– BornToCode
Dec 16 '18 at 16:09
add a comment |
When I try to burn a DVD with ImgBurn I get a message that the disc is copy protected:
Copyright protection system type: CSS/CPPM
I've been trying to Google on how this protection actually works, all I could find is that there's some secret sectors on the cd that are used for decryption of the data.
However I'm wondering - how is this enforced (someone has to "know" that those sectors should be read by the secret decryption key) - is this some sort of specification on the DVD drive? or perhaps some specification that the operating system "knows" about and therefor decrypts the data successfully?
dvd copy-protection disk-protection
edited 1 hour ago
Mooseman
77131129
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
When I try to burn a DVD with ImgBurn I get a message that the disc is copy protected:
Copyright protection system type: CSS/CPPM
I've been trying to Google on how this protection actually works, all I could find is that there's some secret sectors on the cd that are used for decryption of the data.
However I'm wondering - how is this enforced (someone has to "know" that those sectors should be read by the secret decryption key) - is this some sort of specification on the DVD drive? or perhaps some specification that the operating system "knows" about and therefor decrypts the data successfully?
dvd copy-protection disk-protection
dvd copy-protection disk-protection
edited 1 hour ago
Mooseman
77131129
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
edited 1 hour ago
Mooseman
77131129
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
edited 1 hour ago
Mooseman
77131129
edited 1 hour ago
Mooseman
77131129
edited 1 hour ago
Mooseman
77131129
77131129
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
asked Dec 14 '18 at 6:39
BornToCodeBornToCode
200111
200111
1
en.wikipedia.org/wiki/Content_Scramble_System ! I remember the controversy when the decryption program was leaked, and its distribution is still legally questionable in many places.
– pjc50
Dec 14 '18 at 10:02
@pjc50 - After reading that Wikipedia now I understand that the drive enforces the encryption. I just didn't manage to find the correct Wikipedia until you posted it.. so Please post it as an answer and I'll accept it. Thank you.
– BornToCode
Dec 16 '18 at 16:09
add a comment |
1
en.wikipedia.org/wiki/Content_Scramble_System ! I remember the controversy when the decryption program was leaked, and its distribution is still legally questionable in many places.
– pjc50
Dec 14 '18 at 10:02
@pjc50 - After reading that Wikipedia now I understand that the drive enforces the encryption. I just didn't manage to find the correct Wikipedia until you posted it.. so Please post it as an answer and I'll accept it. Thank you.
– BornToCode
Dec 16 '18 at 16:09
1
1
en.wikipedia.org/wiki/Content_Scramble_System ! I remember the controversy when the decryption program was leaked, and its distribution is still legally questionable in many places.
– pjc50
Dec 14 '18 at 10:02
en.wikipedia.org/wiki/Content_Scramble_System ! I remember the controversy when the decryption program was leaked, and its distribution is still legally questionable in many places.
– pjc50
Dec 14 '18 at 10:02
@pjc50 - After reading that Wikipedia now I understand that the drive enforces the encryption. I just didn't manage to find the correct Wikipedia until you posted it.. so Please post it as an answer and I'll accept it. Thank you.
– BornToCode
Dec 16 '18 at 16:09
@pjc50 - After reading that Wikipedia now I understand that the drive enforces the encryption. I just didn't manage to find the correct Wikipedia until you posted it.. so Please post it as an answer and I'll accept it. Thank you.
– BornToCode
Dec 16 '18 at 16:09
add a comment |
1 Answer
1
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After reading about it on the Wikipedia that user pjc50 posted in his comment, I understand that it's the drive that enforces the encryption.
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
add a comment |
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After reading about it on the Wikipedia that user pjc50 posted in his comment, I understand that it's the drive that enforces the encryption.
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
add a comment |
After reading about it on the Wikipedia that user pjc50 posted in his comment, I understand that it's the drive that enforces the encryption.
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
add a comment |
After reading about it on the Wikipedia that user pjc50 posted in his comment, I understand that it's the drive that enforces the encryption.
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
After reading about it on the Wikipedia that user pjc50 posted in his comment, I understand that it's the drive that enforces the encryption.
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
answered Dec 18 '18 at 22:41
BornToCodeBornToCode
200111
200111
add a comment |
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en.wikipedia.org/wiki/Content_Scramble_System ! I remember the controversy when the decryption program was leaked, and its distribution is still legally questionable in many places.
– pjc50
Dec 14 '18 at 10:02
@pjc50 - After reading that Wikipedia now I understand that the drive enforces the encryption. I just didn't manage to find the correct Wikipedia until you posted it.. so Please post it as an answer and I'll accept it. Thank you.
– BornToCode
Dec 16 '18 at 16:09