Blockchain design inherently makes the records highly resistant to editing and one of the reasons is that editing a record means all the subsequent ones will be altered as a consequence.
Advanced math and the linked nature of blockchain ensure that software processes required to modify a transaction will require obscene amounts of computing power. In short, it would be too much time, resources and effort to be worth it.
Furthermore, transactions recorded by a blockchain are end to end encrypted, meaning only the involved parties have access to the communication. Anyone trying pull data from the communication will have a hard time attempting to do so.
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