Prior Art: Signed Hash Database

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Anyone is free to post a hash, along with a signature. Use of this site is at your own risk, and I provide no guarantees as to its stability or fitness for purpose. To use this site, create a document containing your idea, and append at least 74 random characters. Create a hash using SHA-2. Sign using GPG. Then upload both the hash and the signature. If at some later point you need to prove when you wrote the intial file, you can use the signed hash here, together with the upload time stamp, to prove a bound on when you wrote it. Simples! Why 74 random bits? Well, just for your own piece of mind. 74 ASCII characters take more than 512 bits to represent (518 to be exact). If they are chosen uniformly at random there is no way to compress that part of the document below 518 bits, which is longer than a SHA-2 hash. Thus there is no way you could have been tricked into uploading a compressed version of your document.

Current Entries

Viewing entries 1 through 10 (Total entries: 815)

Hash:
Katherin
Signature:
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Monday, February 06 2023 - 01:12 AM
Hash:
Freddie Shepp
Signature:
Pavel Studio online services and fast api.
Friday, February 03 2023 - 08:41 AM
Hash:
Freddie Shepp
Signature:
Pavel Studio online services and fast api.
Friday, February 03 2023 - 08:39 AM
Hash:
Nan
Signature:
I delight in the knowledge on your web sites. Thank you so much!

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Saturday, January 28 2023 - 10:28 PM
Hash:
Deb
Signature:
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Saturday, January 28 2023 - 05:09 PM
Hash:
Carlos
Signature:
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Monday, January 23 2023 - 03:24 PM
Hash:
Linnea
Signature:
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Friday, January 20 2023 - 01:48 PM
Hash:
Molly
Signature:
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Thursday, January 19 2023 - 12:08 PM
Hash:
Alphonse
Signature:
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Thursday, January 19 2023 - 09:34 AM
Hash:
Doyle
Signature:
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Wednesday, January 18 2023 - 03:52 PM
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