Prior Art: Signed Hash Database

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 41 through 50 (Total entries: 1730)

Hash:

Franziska

Signature:

You are so awesome! I do not believe I have read a single thing like this before.
So wonnderful to discover someone with some original thoughts on this issue.
Seriously.. thank you for starting this up. This website is one thing that is required
on the web, someone with a bit of originality!

how many axles does my car Have

Monday, March 30 2026 - 12:19 PM

Hash:

Brooks

Signature:

Bu saytdakı məlumatları oxumaqdan zövq alıram.
Təşəkkürlər!

1win mercler

Thursday, February 26 2026 - 10:50 AM

Hash:

Ella

Signature:

Bu kontentə görə təşəkkürlər. Saytı dostlarıma tövsiyə edəcəyəm.

1win platforma

Thursday, February 26 2026 - 06:25 AM

Hash:

Jefferson

Signature:

Paylaşdığınız məlumatlar mənə çox kömək edir. Təşəkkürlər!

1win platforma

Wednesday, February 25 2026 - 08:08 PM

Hash:

Riley

Signature:

Bu saytdakı məlumatları oxumaqdan zövq alıram.
Çox sağ olun!

1win platforma

Tuesday, February 24 2026 - 04:08 AM

Hash:

Waylon

Signature:

Отличное kazino olimp, качественный контент.
Большое спасибо!
kazino olimp

Monday, February 23 2026 - 06:39 PM

Hash:

Millie

Signature:

Sayt çox funksionaldır.

1win

Monday, February 23 2026 - 01:33 PM

Hash:

Maddison

Signature:

소개할게요클럽정보 구해요그치만 예약 정보주세요고마워요
룸술집
추천주점

Saturday, February 21 2026 - 12:34 AM

Hash:

Shonda

Signature:

Party Snapps Photo Booth OⲤ| Pһoto Booth Rentaⅼ Orange County
12911 Dungan ᒪn, Garden Grove, CA 92840
дедицира

Thursday, February 19 2026 - 05:49 AM

Hash:

Tegan

Signature:

ΕΠΙΠΛΑ ΓΕΩΡΓΑΝΤΑΣ
ΠΑΝ. ΓΡΗΓΟΡΙΑΔΗ 3
ΩΡΑΙΟΚΑΣΤΡΟ, ΘΕΣΣΑΛΟΝΙΚΗ
Τ.Κ. 57013
Τηλέφωνο
23120 08844, 6976590826
έπιπλα θεσσαλονίκη

Wednesday, February 18 2026 - 02:21 PM