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 1 through 10 (Total entries: 342)

Hash:
Damion
Signature:
I enjoy what you guys are usually up too. Such clever work
and coverage! Keep up the great works guys I've incorporated you guys to blogroll.

dobre typy bukmacherskie
Wednesday, September 15 2021 - 08:30 PM
Hash:
Fausto
Signature:
Thanks with regard to furnishing many of these well put together content.


betting tips this weekend
Wednesday, September 15 2021 - 09:21 AM
Hash:
Zachery Frear
Signature:
This is a test

www.test.com
Tuesday, September 14 2021 - 11:14 PM
Hash:
Kelley
Signature:
Chào mừng bạn đến với trang web game lớn nhất Việt
Nam
Tôi đoán bạn sẽ thích trò chơi tiền mặt này
(084)265676677
%ancher_text%
Tuesday, September 14 2021 - 03:32 PM
Hash:
Brent
Signature:
Fantastic content you have here.
dobre typy bukmacherskie
Sunday, September 12 2021 - 10:59 AM
Hash:
Del
Signature:
A person essentially lend a hand to make severely articles I'dstate.
Thhis is the very first time I frequented your website page and
up to now? I surprised with the research you made to create this
actual put up amazing. Wonderful activity!
Kasino bermain untuk gratis tanpa registrasi homepage 24 kasino
Saturday, September 11 2021 - 12:53 PM
Hash:
Mckenzie
Signature:
Fantastic web page you have got right here.
Feel free to surf to my blog post: webpage
Saturday, September 11 2021 - 12:36 AM
Hash:
Anke
Signature:
Do you have a spam problem on this blog; I also am a blogger, and I was wanting to know your situation; wee have created
some nice ractices and we are looking to trade techniques
with others, be sure to shoot me an e-mail if interested.

Profesjonalne Typy bukmacherskie
Saturday, September 11 2021 - 12:07 AM
Hash:
Roxie
Signature:
Wow cuz this is really great job! Congrats and keep it up.

pewniaki na dziś piłka nożNa
Friday, September 10 2021 - 05:44 PM
Hash:
Madie
Signature:
Hey would you mind sharing which blog plztform you're using?
I'm going to start my own blog soon but I'm having a difficult time selecting between BlogEngine/Wordpress/B2evolution and Drupal.
The reason I askk is because ypur design and style seeems different then most blogs and
I'm looking for something unique. P.S Appologies for being off-topic but I had to ask!

Sports betting web page boxing betting parimatch
Thursday, September 09 2021 - 06:01 AM
Powered by DRBGuestbook · PHP Web Hosting and Free PHP Scripts