Questions tagged [majority-attack]

A majority attack, or 51% attack, is an attempt at solo-mining a longer chain to outpace the main chain.

7 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
1
vote
0answers
132 views

Minority Attack on Bitcoins

I read the first paper which described the bitcoins. Most of it is clear except for one thing. I tried to find solutions online but couldn't find it. I am completely aware of the implications of a ...
0
votes
0answers
11 views

How much hash power exists in redundant mining hardware?

I'm trying to understand the feasibilty of a hostile nation-state performing a double spend attack on bitcoin. Assuming mining profitability is not a concern, I wonder if they could buy or borrow ...
0
votes
0answers
32 views

Pissing Attack / adversarial blocks attack

How do the ones of you familiar with the protocol and game theory suggest dealing with potential 'empty block attacks' (a majority of miners collaborate to slow down Bitcoin transactions by producing ...
0
votes
3answers
92 views

Can the 51% attack be made to become 81% attack or 91% attack?

Since the 51% attack happens if there are more than 50% of nodes that fake the data on the blockchain, can it be actually 81% or 91% that is needed to fake the data, because it would be much harder if ...
0
votes
1answer
38 views

the client's 'invalidateblock' debugging command - possible prevention against majority attack?

there is a 'invalidateblock' debugging command in the btc client. How can this command be used in a situation of majority attack threat and play a part of countering the attack? I understand that ...
0
votes
1answer
59 views

Bitcoin 51% majority miner attack - question on the role of user activated soft forks as defense tactic

If one mining entity has alone 52% hash power of the overall network, then this party can block transactions for example and try to "build" up a forked, longer chain while time passes, right?. As I ...
0
votes
0answers
42 views

Is 10K full nodes enough to bitcoin to avoid 51% attack?

As I know bitcoin has about 10K full nodes. And the question is in my mind is that: This number is not huge! If someone has 6K servers, Can control the bitcoin via 51% attack? I was thinking if ...