[Patentpractice] reliable way to compare SHA-512 strings from Patent Center?

[Carl Oppedahl]

I provided a blog post with a practice file that a person could use to 
practice using the hash tool.

    https://blog.oppedahl.com/understanding-message-digests/

On 12/13/2024 1:51 PM, Rick Neifeld via Patentpractice wrote:
> "I now downloaded and installed a free "Digital Volcano Hash tool" -- 
> I gave it USProvfiguresJan2024.pdf and asked for the
> SHA-512 string.   The 'SHA-512' hash strings did NOT match." -
>
> If you did the calculation right, then 
> the  "USProvfiguresJan2024.pdf." you just calculated the SHA-512 hash 
> value for is not the same file the USPTO used to calculate the SHA-512 
> value.
> Rick
>
>
>
> On Fri, Dec 13, 2024 at 12:02 PM Andrew Berks via Patentpractice 
> <patentpractice at oppedahl-lists.com> wrote:
>
>     The problem could be that the USPTO does some processing on their
>     end and that changes the file from the version that you uploaded
>     so the hash strings will never match. Keep in mind however that
>     humans have to look at these files and humans don't read computer
>     bits directly. We read text and images.
>
>
>     Andrew H. Berks, Ph.D., J.D.
>     Patent Attorney
>     Berks IP Law PLLC
>     85 Broad St 17th Fl
>     New York NY 10004 (US)
>     mobile: +1 845-558-7245
>     andrew at berksiplaw.com, berksiplaw.com
>     <https://berksiplaw.com/>LinkedIn
>     <https://www.linkedin.com/in/andyberks/>
>
>
>     On Fri, Dec 13, 2024 at 3:00 AM William Ahmed via Patentpractice
>     <patentpractice at oppedahl-lists.com> wrote:
>
>         Dear List,
>
>         BACKGROUND (The Old Days -- EFS Web)
>
>         Until 2023, we always submitted filings via EFS web. EFS web
>         provided the BYTE COUNT upon filing.
>
>         This was great and important.
>
>         If 3 years later, when filing the figures for a continuation
>         application, I wanted to make 100% sure that I was re-filing
>         the /exact same pdf file /(instead of another version with the
>         same file-name),
>         I would check the byte count (usually using an MS-DOS window -
>         yeah, I am over 50 years old) to make sure.
>
>
>         PATENT CENTER (I need the same functionality that I used to have)
>
>         Now we live in the world of SHA-512 - Patent Center gives
>         SHA-512 rather than bye count.
>         I want to do the same for Patent center - I want the ability
>         to take a pdf file on my computer (e.g. 11 months after filing
>         a US provisional), run it through SHA-512 and reproduce the
>         SAME SHA-512 string.
>
>         I am embarrassed to say that I TRIED and I  FAILED
>
>         In Jan 2024, a US provisional was filed -- the drawings file
>         (USProvfiguresJan2024.pdf had a SHA-512 value of "abcdefg".
>         I now downloaded and installed a free "Digital Volcano Hash
>         tool" -- I gave it USProvfiguresJan2024.pdf and asked for the
>         SHA-512 string.
>         The 'SHA-512' hash strings did NOT match.
>
>
>         What am I doing wrong?
>
>         Thanks,
>         Bill
>         -- 
>         Patentpractice mailing list
>         Patentpractice at oppedahl-lists.com
>         http://oppedahl-lists.com/mailman/listinfo/patentpractice_oppedahl-lists.com
>
>     -- 
>     Patentpractice mailing list
>     Patentpractice at oppedahl-lists.com
>     http://oppedahl-lists.com/mailman/listinfo/patentpractice_oppedahl-lists.com
>
>
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