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Advanced PDF Password Recovery Pro: versions history
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! bug fixed
+ improvement/modification
Version 2.12
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+ password caching for decryption
! crash on trying to decrypt with invalid password
! problems on dictionary attack with "any password" option
! problems with start/end fields functionality
Version 2.11
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+ improved Windows XP compatibility
+ processing PDF documents without IDs
Version 2.10
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+ brute-force and key search attack optimizations for Pentium 4 (SSE2)
Version 2.00
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+ brute-force attack: now 30% faster on PII/PIII, and 70-120% faster on AMD Athlon
+ key search attack: now 15% faster on AMD Athlon
! processing files with incorrect stream sizes
! show incorrect speed on key search attack
Version 1.70
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+ improved speed on PDF 1.4 files (128-bit encryption) : now about 2 times faster!
+ extended error diagnostics
+ processing partially corrupted files (repairing on the fly)
+ show info about security handler: name, version, bits
! processing files with balanced pairs of parentheses within a string
Version 1.61
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+ processing files starting with %!PS-Adobe-X.x PDF-Y.y
+ processing files with extra data after PDF footer
! processing files without linebreak after PDF footer
! an ability to call "open file" dialog more than once
! auto-save on "Key search" attack
Version 1.6
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+ "Key search" attack now about 10% faster
! processing files with extra data before PDF header
! running "Key search" for files with "owner" password only
Version 1.5
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+ "Key search" attack has been implemented
+ Help file: explanation of error codes
! Eliminating "Error 1" (no reference to objects table)
! Eliminating "Error 1008" (invalid OwnerKey format)
Version 1.01
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! support for FileOpen and BPTE_rot13 plug-ins have been removed after a legal advise
! a few minor bugs have been fixed
Version 1.0 (Release)
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+ increased speed on brute-force attack:
+ about 20% on Acrobat 3.x/4.x files (40-bit encryption)
+ about 60% on Acrobat 5.x files (56..128-bit encryption)
+ new option: "Use MMX instructions"
+ support for files protected with BPTE_rot13 plug-in
Version 1.0 beta 1
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First public release.