in theory, more than 51% of the computing power can be tampered with. Many of the federation chains are made in the form of the same platform"s own servers. Can it be said that 100% of the computing power is in the hands of this platform, and it is possible for the platform to tamper with records?
if there is only one server, then the computing power is 100% concentrated on this server, and records can be tampered with at will.
if there are three servers that tamper with the data of two of them, it is equivalent to modifying 66.67% of the records, and the other unmodified machine must obey the majority and the other two servers.
if there are 100 servers that Synchronize data with each other, if you want to modify a record, you need to make changes on at least 51 servers at the same time to succeed.
this is a voting mechanism in itself, and the minority is subordinate to the majority. The premise of the so-called decentralization is that the data is highly dispersed, scattered among the 10 million or even hundreds of millions of computers with equal rights around the world, and no one has enough resources to master tens of millions of servers. But in fact, as the mining machine resources are now highly concentrated and in the hands of several monopoly giants, the number of machines owned by each individual may not exceed 51%, but if they form an alliance, the total calculation power can easily exceed 51%. At that time, retail investors will not be able to fight back if they formulate any policies that are beneficial to them in the form of a vote. This is the rule of democracy.
the algorithm used by federation chains is different from that of common chains, and federation chains are generally agreed upon by voting.