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A comment on Service lets you "certify" a document using the Bitcoin blockchain. Parent comment

Re:Service lets you "certify" a document using the Bitcoin b... by beagle3 on Friday November 29, 2013 @03:23PM (#6820877)
I guess they are on a backup or misremembered - but examples are really easy to find on the net if you want them:

http://th.informatik.uni-mannheim.de/people/lucks/HashCollis...

http://www.win.tue.nl/hashclash/ChosenPrefixCollisions/ has a multicollision: 12 PDF files with different content and the same MD5 hash.

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