Is Blockchain Hackable?

[Niko]

Is Blockchain Hackable?

As a practical matter, blockchain can not be hacked. The records on all the many computers that are holding identical information are interlocked. If one computer's blockchain updates are hacked, it will be returned by the system. Changes can only be made if the innumerable sites where the blockchain resides all due to the same change and that makes it unhackable. The only way the system can be hacked would be if all the system locations in the world, possibly located on millions or billions of computers, could be hacked simultaniously. It's possible in theory but the undertaking would be so massive that only a government-scale effort could even contemplate it and it would not be a small government effort, it's a moonshot of an effort. It's possible only in theory, it's never been done and no one knows if it can. It is a far greater undertaking, by many orders of magnitude, than hacking into a major bank or Google or any of the more protected sites in the world today. While it's theoretically hackable, it may be the most massive, complex hack possible.

Lennon wrote the song Imagine, he said, “Imagine there’s no countries, it isn’t hard to do.” It’s still hard to imagine no countries but so many changes are coming with the implementation of blockchain computing, anything is possible.

[Cold_Zero]

Only if you can control 51%nodes of the blockchain but for the large networks it is practically near to impossible task.

[Dynamite]

Everything under programs can be able to hack most specially if it is online.
There wasn't a perfect formulation of programs because no matter how complex it is there are someone to come that can access blockchain in illegal way. It means it is vulnerable.