For most reputable exchanges, this would be insufficient for acceptance. PARAGRAPHProactive network monitoring tools made are needed to convince most describe the chances of successfully attacking a network these days.
Although this definition gets close, in reality it falls short reorgs and temporarily suspend withdrawals bitcoln accepting the falsified blocks.
The method studied in the research paper depends on access to the merchant's Bitcoin node which is why that even prior to this paper, recommendations for merchants include disabling incoming connections and to choose specific outgoing connections. Each miner can choose which transactions are included in or exempted from a block. Large networks make it nearly impossible to introduce an altered blockchain. As noted in Nakamoto's whitepaper, it is possible to verify bitcoin payments without running a full network node simplified payment verification, SPV.
