Service lets you "certify" a document using the Bitcoin blockchain
proofofexistence.com
Service lets you "certify" a document using the Bitcoin blockchain
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Re: Service lets you "certify" a document using the Bitcoin blockchain
#2nice concept !
apparently sha-1 is vulnerable to collisions (http://eprint.iacr.org/2008/469.pdf)
how are they handled ?
Re: Service lets you "certify" a document using the Bitcoin blockchain
#3nice concept ! apparently sha-1 is vulnerable to collisions ( http://eprint.iacr.org/2008/469.pdf ) how are they handled ?
Excuse me?
Re: Service lets you "certify" a document using the Bitcoin blockchain
#4nice concept ! apparently sha-1 is vulnerable to collisions ( http://eprint.iacr.org/2008/469.pdf ) how are they handled ?
By using SHA-2?
Re: Service lets you "certify" a document using the Bitcoin blockchain
#5nice concept ! apparently sha-1 is vulnerable to collisions ( http://eprint.iacr.org/2008/469.pdf ) how are they handled ?
[deleted]
Re: Service lets you "certify" a document using the Bitcoin blockchain
#6Now this is fricken awesome. I can imagine all sorts of instances where this is applicable. What about as a replacement for a notary public in some cases? Very nice work, and a genius idea.
Re: Service lets you "certify" a document using the Bitcoin blockchain
#7I was thinking along similar lines today, but geared more towards proof of title.
Re: Service lets you "certify" a document using the Bitcoin blockchain
#8Can anyone eli5 exactly what this accomplishes. What sort of scenario would this work for. I'm assuming some sort of legal purposes.
Re: Service lets you "certify" a document using the Bitcoin blockchain
#9Can anyone eli5 exactly what this accomplishes. What sort of scenario would this work for. I'm assuming some sort of legal purposes.
Something like this:
Your provider stores when you had which IP address. This is used for instance in file sharing processes. At least in Germany it has turned out that this information is unreliable. So you want to log your IP addresses and you want to have a proof of the logs integrity. You could use this service for the purpose.
However, I don't like that I need to upload something. I'd prefer generating and sending the hash and get it signed.
Re: Service lets you "certify" a document using the Bitcoin blockchain
#10Can anyone eli5 exactly what this accomplishes. What sort of scenario would this work for. I'm assuming some sort of legal purposes.
It's like taking a fingerprint of a file and then storing it in a public and distributed database (so it is out of any single parties control). Basically you can prove something existed at a certain time (since if I take a fingerprint of that thing in the future, it will match the record in the distributed database). If the thing changes, so does the fingerprint.
It could be used as a form of "poor mans copyright", where people would send a book manuscript, or whatever, to themselves through registered post and keep the envelope intact so they could use it, if need be, in a court. There could be other uses, you could verify that picture was taken when you said it was etc.