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Edited ch12_mining.adoc with Atlas code editor

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@ -1483,7 +1483,7 @@ needed to force a very deep fork is immense, making old blocks
very hard to change. Hashrate attacks also do not affect the security
of the private keys and signing algorithms.
One attack scenario against the consensus mechanism is ((("majority attacks", id="majority-attack")))((("51% attacks", id="attack-51")))called the _majority
One attack scenario against the consensus mechanism is ((("majority attacks", id="majority-attack")))((("51% attacks", id="attack-51")))((("double-spend attacks", id="double-spend")))called the _majority
attack_ or _51% attack._ In this scenario a group of miners, controlling a majority
of the total network's hashing power (such as 51%), collude to attack Bitcoin.
With the ability to mine the majority of the blocks, the attacking
@ -1607,7 +1607,7 @@ Undoubtedly, a serious hashrate attack would erode confidence in
Bitcoin in the short term, possibly causing a significant price decline.
However, the Bitcoin network and software are constantly evolving, so
attacks would be met with countermeasures by the
Bitcoin ((("decentralized consensus", "hashrate attacks", startref="decentral-consensus-hashrate")))((("bitcoins", "mining", "hashrate attacks", startref="bitcoin-mining-hashrate")))((("mining", "hashrate attacks", startref="mining-hashrate")))((("hashrate attacks", startref="hashrate")))((("forks", "hashrate attacks", startref="fork-hashrate")))((("majority attacks", startref="majority-attack")))((("51% attacks", startref="attack-51")))community.
Bitcoin ((("decentralized consensus", "hashrate attacks", startref="decentral-consensus-hashrate")))((("bitcoins", "mining", "hashrate attacks", startref="bitcoin-mining-hashrate")))((("mining", "hashrate attacks", startref="mining-hashrate")))((("hashrate attacks", startref="hashrate")))((("forks", "hashrate attacks", startref="fork-hashrate")))((("majority attacks", startref="majority-attack")))((("51% attacks", startref="attack-51")))((("double-spend attacks", startref="double-spend")))community.
[[consensus_changes]]
=== Changing the Consensus Rules