1/ Consensus must be reached between parties of a network before new information is added to a shared ledger. That agreed upon information become the truth.
2/ In a central database, a single entity can declare what truth is.
There are a number of different nodes that interact to confirm proof of a transaction, known on the Blockchain as consensus.
It is a trustless system that isnât controlled by a central authority, it is decentralised and the system double checks that the information is correct.
Becouse of the network thatâs established in the blockchain we the information is thereby clear and open. The network will determine if a transaction is good and add it to the ledger and if not it will demise it.
There is no real security in a regular database system becouse the system is built with a single copy that a single person can change and thereby alter the truth.
no.1 by removing trust from a transaction by verifying a transaction with a consensus of databases before transaction is completed
no.2 totally transparent trustless decentralised blockchain or easily corrupted based on âtrustâ centralised datebase
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What it means by âblockchain, consensus determine the truthâ is that the information being reviewed as truth or false goes through not one, but multiple decentralized databases who then agrees or disagrees on wether it´s logical information or false information.
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The main difference in how the truth is determined is who has access to change and manipulate said truth. In a central database, several people in a position of power can edit or change what´s already there. Meanwhile on a decentralized database no one can edit or change, only add information.
As well as the information going through several limbs before being confirmed or disregarded.
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Consensus is the verifying of a transaction in the blockchain by multiple computer nodes on their individual copy of the blockchain ledger. Only if they all verify the transaction to be correct, will that transaction be added to each copy of the ledger on the whole blockchain. No middle companies or people required!
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The same type of transaction in a central data base is verified and updated internally by third party person(s) or company(s) . Therefore requiring trust of that third party or middle person.
Q1: âConsensus determines the truthâ means that every computer in the decentralised network has to play its part by coming to an agreement that a transaction is either true or not not true. Only if consensus is true can be added to the blockchain. If it is not true then it is simply ignored. Therefore truth has been agreed not through confidence but through verification of each computer playing by the rules and therefore can be deemed TRUSTLESS.
Q2: This is different from a central database because here everybody needs to be able to trust another party, or central authority that the database entries are correct without having any verification throughout every step of the process. In addition central databases can be altered by anyone who has permissions to do so.
- In the blockchain truth is rewarded and false is punished, so in that way all the players is highly motivated to say truth and it leaves no spaces for a false claims.
- There is only one subject in central database, which determines is it true or false claims. This property makes all the system very vulnerable, because its enaught to make influence on one subject to take over control of all data. On the other hand, blockchain is bullet proof in that way, because consensus is determined by all the nods.
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Consensus determines the truth because the different entities responsibles for evaluating the goodness of a transaction are incentivised to tell the truth and penalised for telling lies.
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In a central database a single entity decides what is true and what is not.
What does it mean when we say that in blockchain, consensus determine the truth?
You are able to verify all transactions through the blockchain network which is incentivized to tell the truth.
How is this different from how truth is determined in a central database?
In a central database you must trust that whoever is managing the database does not tamper with the data
.1. Blockchain consensus determines the truth by all blockchain network parties referencing their individual ledger copy and agreeing to accept a transaction onto the ledger.
- Truth is determined in a central database by the central authority only.
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What does it mean when we say that in blockchain, consensus determine the truth?
a. Decentralized global network removes trust and uses math to allow all nodes to agree on transactions.- How is this different from how truth is determined in a central database?
a. Central DB relies on trust / persons(s) to input correct data.
- How is this different from how truth is determined in a central database?
- There is not only one party deciding what the truth is, itâs all parties.
- It is difficult to cheat here compared to a central database which is based on trust
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What does it mean when we say that in blockchain, consensus determine the truth?
It means that all transactions in a blockchain network are subject to verification by the members. These have financial incentive to confirm it if itâs authentic and decline if itâs not. -
How is this different from how truth is determined in a central database?
In a central database transactions are validated through an institution/person that is in control of the database.
- Consensus remove trust and all transactions or tracking blockchain can be verified in a decentralise database, by many machines (people).
- Central database is controled by one autority and informations can be modified, manipulated or deleted.
- What does it mean when we say that in blockchain, consensus determine the truth?
What we mean by this, is that for any transaction to be validated or any data to be input into the blockchain, the network of computers have to be in agreement that that transaction or data is correct (in consensus) and this is done through mathematical equations supporting the consensus.
- How is this different from how truth is determined in a central database?
In a traditional centralized database, data can be manipulated and altered, meaning it doesnât have the same immutability.
- What does it mean when we say that in blockchain, consensus determine the truth?
Consensus among nodes equals truth while a lack of consensus equals fail or non-truth or; everybody agrees, we call it truth, we donât agree we have a fail. - How is this different from how truth is determined in a central database?
Centralized databases all have a governing authority. This authority can determine what is truth or not.
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What does it mean when we say that in blockchain, consensus determine the truth?
Consensus determines the truth because majority of the network wants to play by the rules in order to get incentives. And also the truth is decided and agreed on by several parties that are competing for rewards. -
How is this different from how truth is determined in a central database?
In a central database, there is a central authority that decides the truth. And also it is not built on incentives so there is nothing to gain.
- What does it mean when we say that in blockchain, consensus determine the truth?
The computers need to agree together and build consensus (the truth) about the validity of the transactions. In this decentralized system, several parties are involved and they are incentivized to say the truth through rewards. - How is this different from how truth is determined in a central database?
In a centralized system, the truth is controlled by a central authority that could potentially cheat the system. So the information in the system can be manipulated.
A. If Al nodes are insentivesed to play by the rule and confirm transactions in all nodes this creates a reliable source of truth.
B. In a central database there is only one vulnerable source of truth that is not transparent