Prior Art: Signed Hash Database

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 11 through 20 (Total entries: 405)

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Abby

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We are usually professional wholesale supplier of jerseys, specialised in supplying General Jerseys and customized jerseys.
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Tuesday, October 19 2021 - 08:09 PM

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Geraldine

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Wonderful blog! Do you hsve any recommendations foor aspiring writers?
I'm hoping too start my own website soon but I'm a little lost
on everything. Would you recommend starting with a free platform like Wordpress or go for
a paid option? Thesre aare so many optionss out there that I'm completely overwhelmed
.. Any suggestions? Thank you!
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Tuesday, October 19 2021 - 03:36 PM

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Camilla

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Tuesday, October 19 2021 - 10:13 AM

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Ellen

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Tuesday, October 19 2021 - 07:46 AM

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Ahmed

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Monday, October 18 2021 - 11:24 PM

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Dolly

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We are professional wholesale provider of jerseys,
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Monday, October 18 2021 - 11:38 AM

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Jonathon

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Wow, gorgeous website. Thnx ...
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Monday, October 18 2021 - 03:00 AM

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Rachele

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Hi there! I know thios is kinda off topic but I was wondering if you knew where I could get a captcha
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platform as yours and I'm having trouble finding one? Thanks a lot!

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Monday, October 18 2021 - 12:04 AM

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Kendall

Signature:

We are usually professional wholesale provider of jerseys, focused in supplying Inexpensive Jerseys and custom-made jerseys.
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Monday, October 11 2021 - 04:48 AM

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Lora

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Wow this is a good web site.
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Sunday, October 10 2021 - 07:53 PM