Acrobat is soon to be national security risk.

[ElizabethOOOG]

Ending support for 32-bit is a National security risk. Adobe SMH

[Bernd Alheit]

Why does you assume this?

[ElizabethOOOG]

Common sense, 35 years of watching government leak, fail, outsource, fall behind, and too divisive to recognize the change. Government will be forced into adopting (what? which country?) software in a rush. Government is in a state of attrition. It doesn't take much to fail. 

[Test Screen Name]

Well, I never thought of that. I'm sure you know best, but since I live in a different country to you, it doesn't bother me very much.

[JR Boulay]

What is your question?

[ElizabethOOOG]

It's a statement. Not a question. I mean what I write, not what other's think.

[Test Screen Name]

That's very interesting. Where can we find out more about this?

[Bevi Chagnon - PubCom.com]

What, in your opinion, makes 64 bit more insecure than 32 bit?

[ElizabethOOOG]

The statement was about Adobe helping with incompetence by discontinuing support 32-bit pdf. It’s very disconcerting that a major software company (Adobe) can just discontinue support for billions of relevant legal documents. Adobe routinely has done this for decades. PDF, the portable document format. Adobe made a substantial standard and is now abandoning that format. That’s wrong. People that read PDFs don’t know how to make them or troubleshoot PDFs. Whenever leadership is abandoned a more insidious leader arises. Happens every time. Cause and effect.

[Bernd Alheit]

PDF files have nothing to do with 32bit or 64bit.

[Bevi Chagnon - PubCom.com]

Agree with  @Bernd Alheit.

32 and 64-bit refer to the operating systems that Acrobat and other brands of PDF-reading/writing software run on. Adobe is no longer the only creator of that type of software.

Nothing to do with the PDF file format itself, which since 2008 has been an open-source file format defined by ISO standard 32000. See https://www.iso.org/standard/51502.html  and https://www.iso.org/standard/75839.html

Adobe does not control the PDF file format, although they are on the international ISO committee that maintains the standard.

Not sure I understand your issue. What makes a 64-bit OS less secure than a 32-bit OS, in your opinion? And why would this affect legacy PDFs made with 32-bit software?

[ElizabethOOOG]

Adobe abandoned support for 32-bit. 
Support is the keyword. I can imagine subcontractor not skilled in e-commerce at all compromising information because one doesn't have support. 

[gener7 · Accepted solution]

This must be the reference: https://helpx.adobe.com/acrobat/kb/end-of-support-acrobat-reader-32-bit-os.html

I'm using MacOS which dropped support for all 32 bit apps in 2019 begining with MacOS 10.15

Adobe Acrobat is dropping security and product updates for 32 bit, but they drop update support for all of their software products, 32 and 64, more than two versions behind.