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RE: Crypto's Achilles Heel 51% Double-Spending Attack Possible on Some Blockchains, Like BTG

in #cryptocurrency7 years ago

The craziest thing about this is that it's not happening more often. I interpret this as a testament to the hacker community. There are only a relative handful of people in the world with the technical knowledge to pull off these attacks, but the vast majority of them choose not to.

People with that kind of technical knowledge know just how important this revolution is and allow it to flourish unhindered. The black hats are much more likely to engage in "legitimate" cryptojacking attacks to use other people's computers to mine the currency without attacking it.

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Maybe someone should attack these coins to drive value back to btc And eth.

  1. Why not drop an anchor in eth btc and bch just to make it 3x harder to bust

  2. Doesnt 50 pct of hash power just means you are likely to get two blocks in a row? In practice you need about 6 confirmations so thats only 3 pct of the time that would get six in a row.

This could be wrong i am legitimately asking.

I think it all just depends on the protocol of the given coin. I'm not confident of the technicalities either... but if you have 51% of the hash power I think you can deny someone else's claim to a valid block.

51% hash power allows you to author every block in a row with a certainty of 1. 40% hash power gives you 0.5 certainty of mining 6 blocks in a row. There is a calculator online somewhere, can't find it now. This is why mining pools are such a disaster for PoW security.

Yeah, one attacks the crypto, the other just profits by exploiting the people ;)

It's funny though because cryptojacking is like a gentleman's hack. It's totally like Office Space. Steal a few pennies from millions of people.