Is blockchain really needed for security?

[nc50lc]

But then that will bring us back to my previous post where I was asking "what is a blockchain?". Does the unquestionability of bringing consensus, or the "truth", to a "blockchain" have to be secured by proof of work? Because for me it has to.

Creating a "blockchain" for the sake of having it called a "blockchain" is moronic.

We may be moronic to call blockchain "blockchain" but the fact that even if is wasn't called POW/mining/TheMatrix or something, the information about Proof of Work wasn't been disregarded.
That's how Terminology works and I hate it (Honestly, I'm bad at remembering names).

Okay, let's just stop there.
That's your opinion and you expressed your point, I'm not against it.

We're getting off topic.

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[Wind_FURY]

But then that will bring us back to my previous post where I was asking "what is a blockchain?". Does the unquestionability of bringing consensus, or the "truth", to a "blockchain" have to be secured by proof of work? Because for me it has to.

Creating a "blockchain" for the sake of having it called a "blockchain" is moronic.

We may be moronic to call blockchain "blockchain" but the fact that even if is wasn't called POW/mining/TheMatrix or something, the information about Proof of Work wasn't been disregarded.
That's how Terminology works and I hate it (Honestly, I'm bad at remembering names).

Okay, let's just stop there.
That's your opinion and you expressed your point, I'm not against it.

We're getting off topic.

If Proof of Work was not disregarded, then would you agree with me when I say that "those claiming to use a blockchain without Proof of Work is not a real blockchain?"

Plus this is not off-topic. It is Proof of Work that secures the Bitcoin "blockchain".

[jenongs]

is blokchain needed for security?
yes of course, because the Blockchain System does not use a third party as a center, but uses many parties or computers that are spread on the network itself. This will make irresponsible people difficult to enter the system and have interference that is not possible.

[posi]

Yes block chain is immutable and make a distributed secure database without block chain is like been no sunshine and rain because a lot of  internet users used a node of the network records and corroborate each transaction data. So, the best distributed secure database is by making use of block chain.

[hulla]

Block chain is a powerful and secure network. In terms of security blockchain provides the solution to identity authentication which was the answer to reduce fraud, crime, fake document, breached accounts and making sign on going through seamless which is why some banking sector are captivated by it. However, it can be use during election for counting genuine vote either. There fore a secure database is incomplete without block chain.

[Zocadas]

On blockchain each full node is not dependend from a centralized service. The technologies of the blockchain are not new. We had cryptography already and p2p networks. The combination of all those technologies makes blockchain so successful, unique and secure. We will soon see, that Blockchain will take an important part in our personal and business life.

[Wind_FURY]

is blokchain needed for security?
yes of course, because the Blockchain System does not use a third party as a center, but uses many parties or computers that are spread on the network itself. This will make irresponsible people difficult to enter the system and have interference that is not possible.

This is the typical canned response. But what secures the blockchain? What makes it hard for "bad actors" from colluding? The answer lies in how Bitcoin works and why it works, and once you deeply understand it, you will start saying "Bitcoin, not blockchain".

[bob123]

On blockchain each full node is not dependend from a centralized service.

This depends on most networks which utilize a blockchain, but not on all.

There are a lot of projects with either a 'permissioned' blockchain, which does only allow participants based on some properties, decided by a central authority.
Or projects which 'seem' to be decentralized, but in fact are extremely centralized (e.g. NEO).


While a blockchain only is useful and necessary in a decentralized and trustless network, a lot of projects are just using it as a buzz word to attract more user / investors.
It is not the 'blockchain' but the network topology which makes a network/system decentralized.