For a blog that only receives occasional small amounts you probably shouldn't worry too much about it. However, if you plan to scale up, here are some things to consider: One issue with using the ...

I think you have a valid point. Let's say I control 50% of the mining. How much would I accept to start a new fork from 10 blocks back? With 50% of the mining, I'd be getting about half of the ...

You hash the header. Format is here: https://en.bitcoin.it/wiki/Block_hashing_algorithm The body contains the transactions. Here's the Bitcoin transaction format: https://en.bitcoin.it/wiki/...

From https://en.bitcoin.it/wiki/Proof_of_work: "A proof of work is a piece of data which was difficult (costly, time-consuming) to produce so as to satisfy certain requirements. It must be trivial to ...