What do we call a malicious act that invalidates the previous blockchain history by adding a new tx history at a certain point?
Question: What do we call a malicious act that invalidates the previous blockchain history by adding a new tx history at a certain point?
The malicious act you're referring to is known as a 51% attack. In this scenario, a group of miners or an entity gains control over more than 50% of the blockchain's hashing power or staked tokens. With this majority control, they can manipulate the blockchain by introducing a different version or executing a denial-of-service (DOS) attack. Such an attack could potentially reverse transactions and even allow for double-spending of the native cryptocurrency token, akin to creating counterfeit currency. Smaller networks are particularly vulnerable to 51% attacks, as they require lower hashing power to overcome the majority of nodes.
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