DRM
technology that attempts to protect Intellectual Property, esp Digital Media
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tends to fail over time - see history of software protection, e.g. dongles
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tends to have Side Effect-s of annoying legitimate customers
interesting idea: Social DRM
breaking EBook DRM (so you can use an open reader)
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latest: 2011-06-11-BuyingGoogleEbook
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http://i-u2665-cabbages.blogspot.com/2009/12/circumventing-kindle-for-pc-drm.html
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http://i-u2665-cabbages.blogspot.com/2009/12/circumventing-barnes-noble-drm-for-epub.html
Feb'2015: Barnes And Noble stripping has been failing lately
- old code was failing with {{{
Traceback (most recent call last):
File "ignobleepub_cl.py", line 119, in
sys.exit(cli_main()) File "ignobleepub_cl.py", line 107, in cli_main decryptor = Decryptor(bookkey[-16:], encryption) File "ignobleepub_cl.py", line 48, in init self._aes = AES.new(bookkey, AES.MODE_CBC) Value Error: Key cannot be the null string }}} - found newer version of script - same results (maybe msg
AES improper key used
) - tried the DeDRM app, get error msg
command exited with a non-zero status
- some comments in that page suggested using
Nook Study
app to download books- that has changed to Yuzu https://yuzu.com/nsdownload
- downloaded, launched - used existing library of books
- deleted newest book, let app re-download it. DeDRM failed with same msg
- some comments in that page suggested using
- try the "newer" script on the new book file, get new failure {{{ Traceback (most recent call last): File "ignoblepub_cl2.py", line 319, in decryptBook outf.writestr(zi, decryptor.decrypt(path, data)) File "ignoblepub_cl2.py", line 233, in decrypt data = self.decompress(data) File "ignoblepub_cl2.py", line 223, in decompress bytes = dc.decompress(bytes) error: Error -3 while decompressing: invalid distance too far back }}}
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