Thread: Adobe ADEPT DRM for PDF circumvented
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Old 08-21-2009, 07:10 AM   #454
joblack
Wizard
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Quote:
Originally Posted by JohnTheRipper View Post
Unfortunately for me:

V number (Optional but strongly recommended) A code specifying the algorithm to be used in encrypting
and decrypting the document:
0 An algorithm that is undocumented and no longer supported, and whose use is
strongly discouraged.
1 Algorithm 3.1 on page 73, with an encryption key length of 40 bits; see below.
2 (PDF 1.4) Algorithm 3.1 on page 73, but allowing encryption key lengths greater
than 40 bits.
3 (PDF 1.4) An unpublished algorithm allowing encryption key lengths ranging
from 40 to 128 bits. (This algorithm is unpublished as an export requirement of
the U.S. Department of Commerce.)
V0 - V4 should work ...
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