Microsoft Edge's internal PDF Viewer can not open PDF encrypted width 256bit AES(level8).

Won’t fix Issue #7656659


May 23, 2016
This issue is public.
Found in
  • Microsoft Edge
Reported by 1 person

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Steps to reproduce

Microsoft Edge can not open this PDF:
which is encrypted with 1.7 Adobe Extension Level 8 (256bit).

On the other hand Microsoft Edge can open the following PDF:
which is encrypted with 1.7 Adobe Extension Level 3 (256bit).

Please enhance the internal PDF Viewer so that it can open PDFs with the highest encryption.

Thank you in advance.


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    Comments and activity

    • Microsoft Edge Team

      Changed Assigned To to “Christian F.”

      Changed Assigned To to “Amit K.”

      Changed Assigned To from “Amit K.” to “Manoj B.”

      Changed Status to “Won’t fix”

    • This is a known issue. As of now, however, Adobe has not released the Extension Level 8 of the specification. only provides references up to Extension Level 5 which does support an older variant of the AES encryption.

      The specifications for this PDF version have not been released by Adobe, but are yet implemented in Adobe Reader X. This undocumented version makes use of a new password validation algorithm when opening encrypted documents.

      Apparently the Extension Level 8
       is an intermediate PDF version to prepare for the future arrival of the new ISO specifications (32000-2, aka
       PDF 2.0). Those are still in development, and the current drafts seem to be only available for the members of the ISO committee.


      Undocumented specs like these are subject to change. Please consider this while making any investment in this direction.

      All the best,
      The MS Edge Team

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