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 51 through 60 (Total entries: 502)

Wow because this is great work! Congrats and keep it up.

My web blog: webpage
Saturday, November 20 2021 - 09:13 AM
We are usually professional wholesale provider of jerseys, specialised in supplying Inexpensive
Jerseys and custom-made jerseys. Jerseys with 100% stitched real quality, all Quantities, Logos and Titles are sewn about and embroidered.

china wholesale jerseys
Saturday, November 20 2021 - 01:58 AM
Thanks for the purpose of supplying these types of fantastic details.

Here is my blog post; web page
Saturday, November 20 2021 - 01:18 AM
You've gotten good knowlwdge here.
Have a look at my web page: web site
Friday, November 19 2021 - 09:38 PM
The style retailer can be recognized for its rich manner flavor,
trendy models, and hiring great influencers who remarkably vogue
savvy, attractive, and delightful. Thus far, they have labored with severall attracctive influencers, from Janet Guzman to Tiffany Kellar.The corporation is principally famous
on the social media marketing application Instagram.
Vogue Nova works with quite a few celebrities and viral influencers.
As a result, The followers of Fashion Nova also ttruly feel incredibly connected to fellow Vogue Nova Designs and have impressed by theeir model sense, Way of living,
annd many others.
Friday, November 19 2021 - 12:10 PM
Harry Variations is ideal kmown for currently being a co-founding father of the well
known boy band, One particular Direction. The band established a history as the sole boy band to launch
its initially 5 albums in a calendar calendar year.
Regardless that they broke up, Harry Types stays for being its most famous member.

His design and zeeal have arned hiim a legion of fans plus a dime, hence thhe
necessity to decipher Harry Models' Internet well worth.Full name:
Harry Edward Types Day of beginning: 1st February 1994 Age: 27
in 2021 Position of delivery: Redditch, Worcestershire, England Mom:
Anne Twist Father: Desmond Sister: Gemma Nationality: English
Profession: Singer, songwriter, actor and professional model Style:
Poop new music, delicate rock, Britpop, rock Devices: Vocals Labels: Syco, Columbia Decades Lively:
2010–present Associated act: Just one Route Web really worth:
$80 millionUnited States
Friday, November 19 2021 - 04:19 AM
Keep up the outstanding work !! Lovin' it!

Review my webpage; homepage
Thursday, November 18 2021 - 08:45 PM
Sustain the great work and delivering in the crowd!

Look at my web blog ... homepage
Wednesday, November 17 2021 - 06:02 AM
Great website! It looks very good! Keep up the great job!
Feel free to surf to my web page webpage
Tuesday, November 16 2021 - 02:26 PM
Maintain the good work and bringing in the crowd!
mecz lecha
Monday, November 15 2021 - 10:56 PM
Powered by DRBGuestbook · PHP Web Hosting and Free PHP Scripts