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None. Suffer.
(lemmy.world)
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this post was submitted on 13 Nov 2024
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Apparently, it can be very secure. If “pieces” of a secure key are stored in multiple places, for example, only changing one link in the “chain” means it won’t match with the others. They ALL have to be changed at the same time, which is virtually impossible to do in secret.
Please note that I am far from an expert on the subject. I’m paraphrasing an article I read months ago.
Can’t you takeover a blockchain by owning the majority of a block chain, or by having a majority of the processing power to compute hashes?
If you had 51% of the world's computing power (to blockchains using proof of work) yes you could forge records, from what I could wrap my head around about blockchains.
This would just create a fork in the blockchain where your 51% of the network doesn't match the correct state of the blockchain that the 49% have. The 49% would effectively stop working because they could never validate the transactions that the 51% takeover has fairly created. The node operators of the 49% of the network would need to reach consensus for how to deal with the problem, but essentially they would just adopt code that ignores the 51% data, so they could continue to process blocks of transactions. Without manual intervention the 49% would be frozen. The 51% is just fake, they haven't really changed anything because every real node operator would know it's false data.
What if the 51% have already completed the consensus process?