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: 342)

Hash:
Celina
Signature:
Great looking site. Presume you did a whole lot of your own html coding.

betting tips of the day
Wednesday, September 08 2021 - 10:37 PM
Hash:
Muoi
Signature:
Thanks pertaining to offering these kinds of well put together content.


Feel free to visit my blog homepage
Tuesday, September 07 2021 - 12:13 PM
Hash:
Cruz
Signature:
Astonishingly individual friendly site. Immense information readily available on few clicks on.
polska mecz
Monday, September 06 2021 - 06:52 PM
Hash:
Felipe
Signature:
I benefit from checking your website. Kudos!
Stop by my homepage: homepage
Monday, September 06 2021 - 04:13 PM
Hash:
Fermin
Signature:
I appreciate the knowledge on your web site.
Thanks a bunch!
Betting Tips nba
Thursday, September 02 2021 - 08:29 PM
Hash:
Ward
Signature:
BettingLex Professional Tipsters and reliable betting tips.

Tipster academy, deep knowledge sharing
typy meczów jutro
Wednesday, September 01 2021 - 11:51 PM
Hash:
Ruby
Signature:
Many thanks really practical. Will share site with my pals.

Also visit my site - web page
Tuesday, August 31 2021 - 01:53 AM
Hash:
Lon
Signature:
BettingLex Professional Tipsters and reliable betting tips.

Tipster academy, deep knowledge sharing
darmowe typy na dziś
Monday, August 30 2021 - 07:03 PM
Hash:
Kasey
Signature:
I absolutely love your website.. Great colors & theme.
Did you build this web site yourself? Please repl back as I'm hoping to create my own personal website
and would love too learn where you got thijs from or just what the theme
is called. Appreciate it!
Bulldog frances tenerife web page criadero de bulldog françes
Monday, August 30 2021 - 01:54 AM
Hash:
Trudi
Signature:
I have been browsing on-line greater than three hours
nowadays, yet I by no means discovered any
interesting article like yours. It's beautiful value sufficient
for me. In mmy opinion, if all web owners and bloggers made excellent
content material as you probably did, the web will be
much moree useful than ever before.
Bulldog frtances gris site bulldog frances blanco
Sunday, August 29 2021 - 03:31 AM
Powered by DRBGuestbook · PHP Web Hosting and Free PHP Scripts