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 81 through 90 (Total entries: 149)

Hash:
Willy
Signature:
Sustain the good work and delivering in the group!

come creare un pennello con photoshop extension capelli laser come allungare le ciglia con photoshop lunghezza massima peni esercizi fisici per crescere in altezza
Thursday, November 28 2019 - 08:35 AM
Hash:
Denny
Signature:
Keep up the exceptional job !! Lovin' it!
come aumentare lo spessore del pene come farsi allungare i capelli velocemente uomo titan gel russia dimensioni peni haz un deseo
Thursday, November 28 2019 - 06:51 AM
Hash:
Ernie
Signature:
With thanks for sharing this amazing website.

come allungarsi la palla fifa 16 ps4 lacan el deseo piselli e pancetta con magic cooker aumentare le dimensioni di una foto online ingrandire il pene naturalmente
Tuesday, November 26 2019 - 10:52 PM
Hash:
Loreen
Signature:
Your posts is extremely helpful.
calitatea somnului african mango steroider chute cheveux traitement VigRX Plus
Monday, October 14 2019 - 09:06 AM
Hash:
Kristeen
Signature:
Thanks intended for furnishing these kinds of very good info.


Deseo composição tratamiento de pelo vigrx plus testogen Composition pousse des cheveux
Sunday, October 13 2019 - 07:22 AM
Hash:
Margret
Signature:
I love this website - its so usefull and helpfull.
zakwaszenie organizmu side effects of VigRX testogen haaruitval longueur de pénis
Saturday, October 12 2019 - 01:45 AM
Hash:
Oscar
Signature:
Wow this is a advantageous webpage.
BioBelt remedios caseros para la calvicie Peruanisches Maca Preis Anabolic Rx25 Machoman Preis
Friday, October 11 2019 - 09:39 AM
Hash:
Fausto
Signature:
How are you, great website you have got in here.
maca peruana Flexa Plus acción eron plus come farsi crescere il pene Tonus Fortis
Tuesday, October 08 2019 - 11:35 PM
Hash:
Jean
Signature:
Exceptionally user friendly website. Tremendous info readily available on couple of clicks on.
Turbo Max Blue El-Macho Toiminta Testo Ultra e dove acquistarlo Dr Extenda Složení potens problem
Tuesday, October 08 2019 - 09:23 PM
Hash:
Lashawnda
Signature:
I appreciate checking your websites. Cheers!

Member xxl atlant gel Nutrigo Lab Mass skład eron plus Turbo Max Blue
Tuesday, October 08 2019 - 04:55 PM
Powered by DRBGuestbook · PHP Web Hosting and Free PHP Scripts