blockchain consensus 51 vs number of nodes validation

0 votes
I know that 51% is the minimum percentage for confirming nodes for consensus.

However, in ETH for example:

ETH 2.0 staking has breached 200,000 validators

But I was able to sell ETH when I get 15 nodes (or around that number) confirmation.

So the number of validations to commit my transaction was way less than 51% of 200K.

Can someone please explain to me what I'm getting wrong?
Apr 5 in Blockchain by Rahul
• 8,980 points
30 views

1 answer to this question.

0 votes

51% is an attack vector for Proof of Work (PoW) consensus mechanism. While Eth 2.0 uses Proof of stake (PoS) which is less prone to 51% attack and it does not require 51% nodes for confirming transactions rather has control over 51% of the staked amount. Both PoW and PoS are widely covered in detail by the online community so I will just drop a link so can know the basic differences.

PoW vs PoS

Not all 200k validators participate invalidation process in proof of stakeout of the whole pool of validators a few are chosen randomly to validate a transaction. In the case of Ethereum, it's called a validator committee which has 128 validators that verify the transaction. And the probability of having more bad actors in the validators committee rather than good is really low one in trillion here is the math for it



Please note the No of blocks added to the chain after the block containing your transaction. So if your tx is in block no 10 and the current chain height is 25 then the size of the confirmation will be 15. Confirmation ensures that there is no probability of fork before you use the funds. With each block confirmation, the probability of fork decreases exponentially. Confirmations do not mean the number of validators that confirmed your blocks

answered Apr 7 by Aditya
• 7,280 points

Related Questions In Blockchain

0 votes
1 answer

How to handle memory and processor limitations of nodes in blockchain?

Yes, that's a valid concern. The Bitcoin ...READ MORE

answered Jul 14, 2018 in Blockchain by Shashank
• 10,400 points
213 views
0 votes
1 answer

How do I calculate number of full nodes in bitcoins/altcoins?

You can not calculate/estimate the total number ...READ MORE

answered Jul 17, 2018 in Blockchain by Shashank
• 10,400 points
185 views
0 votes
0 answers

How do I do experiments of blockchain consensus algorithms

I'm writing a paper on the blockchain ...READ MORE

Apr 4 in Blockchain by Rahul
• 8,980 points
20 views
0 votes
1 answer

Protocols used in a distributed/dlt system for the nodes to establish communication

yes all are over TCP/IP connections secured by TLS encryption in hashgraph architecture-hashgraph, ...READ MORE

answered Aug 6, 2018 in Blockchain by aryya
• 7,440 points
623 views
0 votes
1 answer

Truffle tests not running after truffle init

This was a bug. They've fixed it. ...READ MORE

answered Sep 11, 2018 in Blockchain by Christine
• 15,790 points
969 views
0 votes
1 answer
0 votes
1 answer
0 votes
1 answer
webinar REGISTER FOR FREE WEBINAR X
Send OTP
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP