Prior Art: Signed Hash Database

Upload a signed hash



Challenge Image

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: 246)

Hash:
Daniela
Signature:
The information is incredibly exciting.
Look into my website: homepage
Sunday, January 31 2021 - 06:30 PM
Hash:
Angelo
Signature:
I amm sure thiss piece oof writing has touched all the internet visitors, its really really fastodious
paragraph on building up new weblog.
Sports betting parimatch webpage office bets
Monday, January 25 2021 - 01:32 PM
Hash:
Olive
Signature:
Latest Free nulled Plugins for Codecanyon. search
and find top components for Ecommerce softwares.
Tuesday, January 19 2021 - 06:55 PM
Hash:
Rhonda
Signature:
Wow cuz this is really great work! Congrats and keep it up.

Also visit my web-site website
Friday, January 15 2021 - 04:23 AM
Hash:
Pamala
Signature:
Howdy! Do you know if they make any plugins to help with Search Engine Optimization?
I'm trying to get my blog to rank for some targeted keywords but I'm not seeing very good gains.
If you know oof any please share. Thank you!
Calidad site carrocero
Saturday, January 09 2021 - 03:06 AM
Hash:
Maynard
Signature:
Write more, thats all I have to say. Literally, it seems as though you relied on the video to make
your point. You clearly know what youre talking about, why waste your
intelligence on just posting videos to your blog when you
could be giving us something enlightening to read?


... perhaps someone will be interested in my article about free
trading signals for binary options
Monday, January 04 2021 - 04:57 PM
Hash:
Angus
Signature:
Hi there colleagues, pleasant article and pleasant urging commented at
this place, I am really enjoying by these.
... perhaps someone will be interested in my article about signals for binary options
Tuesday, December 22 2020 - 07:10 PM
Hash:
Amado
Signature:
Surprisingly individual friendly website. Tremendous info readily available on couple of clicks on.
Also visit my page :: web page
Tuesday, December 15 2020 - 01:44 PM
Hash:
Skye
Signature:
You have made youir point quitre well.!
Best Essay writing
Chocolate and Raspberry Hearts
Monday, December 07 2020 - 10:54 PM
Hash:
Natalie
Signature:
Apprecite it! Loads of tips.

Best Essay writing
buy your essay
Sunday, December 06 2020 - 04:07 PM
Powered by DRBGuestbook · PHP Web Hosting and Free PHP Scripts