I am a student who studies block-chain for these days.
I have a question about forking attack and selfish mining in mining strategies
as you see picture below
I don't understand why miner should send some money to a victim to do forking attack...
what does this means to do forking attack?
is it possible to do forking attack except sending some money to a victim?
and as below picture about selfish mining
what is difference between forking attack and selfish mining if miners exclude
to do send some money to a victim in forking attack?
can anyone help me to understand what M->B and M->M'(double spending) means??
and why do need it to do forking attack??