why are PNG sizes different

Explorer ,
Jul 04, 2021 Jul 04, 2021

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I am trying to recreate a PNG to match another PNG - it's a small pixelart 24x24.

 

 

If I right-click properties on the original I see...

Bit depth = 4

Size 385bytes

 

I recreated the same image on a 24x24 canvas in Photoshop, and exported to PNG.  When I right-click on properties, I see similar traits:

Bit depth = 4

Size = 385 bytes

 

However - when I compare the Sha-256 HASH of the two images - they come don't equal each other.  What other properties within the file could causing the HASH function to consider these different images?

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Explorer ,
Jul 04, 2021 Jul 04, 2021

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sorry - title is misleading -sizes aren't different - but they SHA-256 hash doesn't recognize them as the same image.  That's what I'm trying to solve for.

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Adobe Community Professional ,
Jul 04, 2021 Jul 04, 2021

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And after further study, the idea of hashing is to identify an image as the original. In fact SHA means "Secure Hashing Algorithm". You cannot reverse-engineer it. In the world of Non-Fungible Tokens, it identifies the artwork as the original. Protection against forgeries. In computing, you know the software you downloaded is the original and not a hacked copy.

http://www.differencebetween.info/difference-between-hashing-and-encryption

 

Anyway, since I'm not a computer engineer, you can check that with other sources.

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