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: 778)

Hash:
Zita
Signature:
Woah! I'm really enjoying the template/theme of this website.
It's simple, yet effective. A lot of times it's very difficult to get that
"perfect balance" between usability and appearance.
I must say you have done a fantastic job with this. In addition, the boog loads very quick for me on Opera.
Excepfional Blog!
Entrenar músculos homepage calidad
Thursday, November 24 2022 - 10:56 AM
Hash:
Iona
Signature:
Sports betting. Bonus to the first deposit up to 500 euros.

sports betting
Saturday, November 19 2022 - 10:36 PM
Hash:
Ray
Signature:
Article writing is also a fun, iif you know after that you can wite
if not it is complicated to write.
Bomba muscular web site atleta
Saturday, November 19 2022 - 09:40 PM
Hash:
Alphonso
Signature:
Maintain the helpful work and generating the crowd!
my blog: webpage
Sunday, November 13 2022 - 09:23 PM
Hash:
Kian
Signature:
Regards for sharing this amazing web-site.


My webpage web page
Saturday, November 12 2022 - 02:53 PM
Hash:
Marissa
Signature:
Thank you so much! It is definitely an incredible website!

my homepage web page
Friday, November 11 2022 - 03:26 AM
Hash:
Laurence
Signature:
Hi to all, as I am genuinely keen of reading this blog's post to bee updated regularly.
It consists of good data.
Farmacología deportiva webpage cómo balancear bíceps
Thursday, November 10 2022 - 11:04 PM
Hash:
Antonietta
Signature:
So informative....looking frontward to visiting again.
Feel free to visit my homepage: homepage
Tuesday, November 08 2022 - 01:05 AM
Hash:
Phoebe
Signature:
Выявляем Ортопедический матрас.
Время покоя – незаменимое, во время которого организм эффективно отдыхает, а наилучшим способом его полного релаксирования становится горизонтальное размещение.
Очень важно, чтобы спина, конечности или шея не располагались в положении стеснения мягких тканей или принимали нагрузки из-за неправильной расположенности либо неравномерности давления на отдельные участки позвоночника исходящей от верхнего слоя опоры.

Обеспечить необходимые условия восстановления призваны ортопедические матрасы. Что за моменты выбора покупатели должны обратить внимание, изучайте в топике: :D Матрасы ортопедические в кривом роге цена
Friday, November 04 2022 - 09:43 AM
Hash:
Emanuel
Signature:
Make money trading opions.
The minimum deposit is 50$.
Learn how to trade correctly. How to earn from $50 to $5000 a day.
The more you earn, the more profit we get.
binary option strategies
Friday, November 04 2022 - 01:04 AM
Powered by DRBGuestbook · PHP Web Hosting and Free PHP Scripts