What is 51 attack in Blockchain

0 votes
Though Blockchain is said to be secure, I heard that it can be vulnerable to 51% attack? What does this mean?
Feb 13, 2019 in Blockchain by Aashi
230 views

1 answer to this question.

0 votes

51% Attack is a situation where a group of miners who hold more than 50% of the Network Hash Rate could manipulate with the New transactions or able to reverse the transactions that were recently confirmed and kind of doing Double spend. It is Highly unlikely to be able to do that today but it is possible. Usually for the Block to get verified, the majority of the network should accept it. So if the majority(at least 51%) is corrupt, then the Blockchain is not secure anymore.

answered Feb 13, 2019 by Omkar
• 69,210 points

Related Questions In Blockchain

+1 vote
1 answer

What is the best way to search for an item in blockchain?

All transactions and records in blockchain are ...READ MORE

answered Apr 21, 2018 in Blockchain by Perry
• 17,100 points
884 views
0 votes
1 answer

What is geth and solidity in Blockchain?

geth is a tool used to run a ...READ MORE

answered Jun 11, 2019 in Blockchain by Rishi
1,719 views
0 votes
0 answers
0 votes
1 answer

What is the previous block hash of block #4390176 in Ethereum Blockchain

1,226,797,074,502,984,598,563 Hope this helps! To know more, Enroll with Blockchain ...READ MORE

answered Sep 7, 2020 in Blockchain by Sayali
6,865 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
1,110 views
0 votes
1 answer
+4 votes
3 answers

What type of database is blockchain?

Blockchain is a distributed database. what makes ...READ MORE

answered Mar 30, 2018 in Blockchain by Christine
• 15,790 points
512 views
+1 vote
2 answers

What is a blockchain and ethereum?

Some of the use-cases are: Healthcare Medical records are ...READ MORE

answered Aug 9, 2018 in Blockchain by Omkar
• 69,210 points
385 views
webinar REGISTER FOR FREE WEBINAR X
REGISTER NOW
webinar_success Thank you for registering Join Edureka Meetup community for 100+ Free Webinars each month JOIN MEETUP GROUP