Blockchain is one of the biggest tech buzzwords of the last few years, and the technology is marketed as a cure for everything that ails you, including cybersecurity. In practice, at least as far as security is concerned, blockchain might actually cause more problems than it solves.
The basic idea behind blockchain is that you’ve got a list of items, or a ledger, that you’re sharing with your peers. A clever bit of encryption keeps you from changing the previous elements on that list, unless the majority of your peers sign off on the change.
It’s pitched as being better than having one trusted central party keep track of the list and make corrections when needed, because the trusted central party usually charges money for the service.