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

[Scott Nielson]

In case anyone else cares, I find NanaZip does a great job of showing hashes (although I mainly use it for creating/opening zip files). It is an open source fork (link<https://github.com/M2Team/NanaZip>) of 7-zip that is available in the Windows Store. It makes it so I can use the right click menu to quickly access a lot of different hashes.
[cid:e1a3cd06-5bfc-4f17-9a63-fefd7959cb7e]



Scott Nielson

801-660-4400

________________________________
From: Patentpractice <patentpractice-bounces at oppedahl-lists.com> on behalf of Carl Oppedahl via Patentpractice <patentpractice at oppedahl-lists.com>
Sent: Friday, December 13, 2024 2:01 PM
To: For patent practitioners. This is not for laypersons to seek legal advice. <patentpractice at oppedahl-lists.com>
Cc: Carl Oppedahl <carl at oppedahl.com>
Subject: Re: [Patentpractice] reliable way to compare SHA-512 strings from Patent Center?


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<mailto: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<mailto: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<mailto: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
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