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Using bitcoin based blockchain as notary service without third party

We have seen a lot of notary services that use bitcoin ( or any bitcoin based currency ) blockchain. Those services always have some server ...
How to create your own satoshidice game

SatoshiDice introduced new and unique way of gaming / gambling online. It's the concept of wallet blockchain games. On the first sight i...
Preventing transaction malleability on services that operate with 0 confirmations

This days become popular another "issue" about bitcoin protocol. It's named transaction malleability and it's nothing new ...
Private key QR extra protection

I got idea for creating a printed wallet where on easy way we can add extra security to it or to make it double secure than any another prin...
Secure printed wallet PoC / experiment 2 ( better materials + 2 strategies )

After struggle with sticky paper here it's some transparent paper in my hands. I have performed few experiments two different approach...
Secure printed wallet PoC / experiment

After solving the problem in teory (adding extra security on paper wallet / cold storage), little math and PoC software http://btcluck.bl...

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