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 61 through 70 (Total entries: 216)

Hash:
Liza
Signature:
Wow because this is excellent job! Congrats and keep it up.

Here is my website auto bu sites of france [area2.mmluna2.com]
Tuesday, June 09 2020 - 10:56 PM
Hash:
Mariano
Signature:
Thank you so much for sharing this good site.
Feel free to visit my blog post www.chimie-theorique.cnrs.fr
Sunday, June 07 2020 - 03:49 AM
Hash:
Sybil
Signature:
Amazing such a beneficial online site.
My page - easy ice cream - conference.portonvictor.org -
Saturday, June 06 2020 - 08:38 AM
Hash:
Gita
Signature:
This is a topic that's ndar to my heart...

Best wishes! Where are your contact drtails though?

water dispenser (ydfoundation.org) water pump
Saturday, June 06 2020 - 07:45 AM
Hash:
Antonio
Signature:
Unbelievably individual friendly site. Great details readily available on couple of gos to.

Take a look at my blog post; buy anabolic steroids (ns1.xakepok.net)
Thursday, June 04 2020 - 07:42 PM
Hash:
Dianne
Signature:
Wow because this is great work! Congrats and keep it up.

Also visit my blog castelletto.info
Friday, May 29 2020 - 08:30 PM
Hash:
Kandis
Signature:
Thanks meant for providing these kinds of fantastic information.

Stop by my blog
Friday, May 29 2020 - 01:00 PM
Hash:
Enid
Signature:
Superb webpage you've gotten in here.
Here is my homepage; Desktop to buy a showcase [bluebikerealty.com]
Tuesday, May 26 2020 - 06:15 PM
Hash:
Wilton
Signature:
Thanks regarding supplying this kind of good posting.

Here is my webpage give water for analysis Kiev (www.khaosaming.go.th)
Friday, May 22 2020 - 07:43 AM
Hash:
Fanny
Signature:
I know this if off topic but I'm looking into starting my own blog and was wondering what all is
required to get set up? I'm assuming having a blog like yours would cost a pretty penny?
I'm not very internet savvy so I'm not 100% certain. Any tips or advice would
be greatlpy appreciated. Cheers
дизайн-проект заказать дизайн интерьера
дизайн-проект
Thursday, May 21 2020 - 06:17 AM
Powered by DRBGuestbook · PHP Web Hosting and Free PHP Scripts