PDF ISO
ISO PDF

 

ISO PDF have many versions , each version have different features and security .

 

PDF/A is an ISO-standardized version of the Portable Document Format (PDF) specialized for the digital preservation of electronic documents.

 

PDF/A differs from PDF by prohibiting features ill-suited to long-term archiving, such as font linking (as opposed to font embedding).

 

The ISO requirements for PDF/A file viewers include color management guidelines, support for embedded fonts, and a user interface for reading embedded annotations.

 

 

PDF/A-1 is based on the PDF Reference Version 1.4 from Adobe Systems Inc. (implemented in Adobe Acrobat 5 and later versions) and is defined by ISO 19005-1:2005, an ISO Standard that was published on October 1, 2005: Document Management – Electronic document file format for long term preservation – Part 1: Use of PDF 1.4 (PDF/A-1)

 

PDF/A-2 is based on ISO 32000-1 – PDF 1.7 and is defined by ISO 19005-2:2011, published on June 20, 2011 under the formal name Document management – Electronic document file format for long-term preservation – Part 2: Use of ISO 32000-1 (PDF/A-2).

 

PDF/A-3 is based on ISO 32000-1 – PDF 1.7 and is defined by ISO 19005-3:2012, published on October 15, 2012 under the formal name Document management — Electronic document file format for long-term preservation — Part 3: Use of ISO 32000-1 with support for embedded files (PDF/A-3)

pdf version -acrobat x1(11)1. adobe extension level 8

PDF ISO-32000-2 (draft) Demo

PDF security table

Flipscloud Support – PDF version

FlipsCloud PDF Support – PDF Version

Release Year ISO Standard PDF Versions Acrobat PDF Versions Encryption Algorithms Watermark Digital Signatures Password Key Lengths
1993 1 Acrobat 1 RC4 40-bit WaterMark
1994 1.1 Acrobat 2 RC4 40-bit WaterMark 32 characters (Latin-1)
1996 1.2 Acrobat 3 RC4 40-bit WaterMark 32 characters (Latin-1)
2000 ISO 15930-1:2001 & ISO 15930-3:2002 1.3 Acrobat 4 RC4 40-bit WaterMark Digital Signatures 32 characters (Latin-1)
2001 1.4 Acrobat 5 RC4 128-bit WaterMark Digital Signatures 32 characters (Latin-1)
2003 1.5 Acrobat 6 RC4 128-bit WaterMark Digital Signatures 127 UTF-8 bytes (Unicode)
2005 1.6 Acrobat 7 AES-128 WaterMark Digital Signatures 127 UTF-8 bytes (Unicode)
2006 ISO 32000-1:2008 1.7 Acrobat 8 AES-128 WaterMark Digital Signatures 127 UTF-8 bytes (Unicode)
2008 1.7 Adobe Extension Level 3 Acrobat 9 AES-256 WaterMark Digital Signatures 127 UTF-8 bytes (Unicode)
2009 1.7 Adobe Extension Level 8 Acrobat X (10) AES-256 WaterMark Digital Signatures 127 UTF-8 bytes (Unicode)
2012 ISO 32000-1 1.7 Adobe Extension Level 8 Acrobat XI (11) AES-256 WaterMark Digital Signatures 127 UTF-8 bytes (Unicode)
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