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Questions tagged [sybil-attack]

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1answer
106 views

How does Bitcoin currently mitigate Sybil and Eclipse attacks?

What countermeasures does Bitcoin currently have in place to limit Sybil attacks (ie of full nodes [not miners]) and eclipse attacks? In particular, it seems like an important countermeasure would ...
0
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1answer
117 views

Rewarding full nodes trough the Lightning Network

Sometimes I think "DASH" has some kind of advantage over Bitcoin because it has some rewards not just for the miners, also for the full nodes. Am I correct? Is not this a strength (a prevention) ...
6
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2answers
207 views

Can a full node provide a bogus block bloomfilter to a Neutrino node?

When a thin client using BIP157/BIP158 (Neutrino) requests the block filter for the latest block, would it be possible for the full node serving this request to attack the Neutrino node by providing a ...
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0answers
127 views

Sybil attack with IOTA? [closed]

IOTA is one of the DLTs uses DAG (Directed Acyclic Graph) as data structure. The solutions to attacks proposed by IOTA white paper seems unconvincing, in particular, in case of double-spending, it ...
0
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1answer
381 views

resilience to sybil attack - public vs private

it appears that although not totally water-proof to Sybil attacks, Bitcoin network seems quite resilient to these kind of attack Preventing Sybil attacks. Is it true to assert that permissioned or ...
4
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1answer
309 views

Sybil attack countermeasure

In Bitcoin Wiki Weaknesses: Sybil attack they mention that: "Bitcoin makes these attacks more difficult by only making an outbound connection to one IP address per /16 (x.y.0.0)". Why would this ...
6
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2answers
3k views

Eclipse attack vs. Sybil attack

I came across this paper Eclipse Attacks on Bitcoin’s Peer-to-Peer Network ∗ that sounds very similar to the Sybil attack. Can someone point out the difference between both attacks.
0
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1answer
112 views

Can zero-transactions block generation be called as a Sybil attack?

Imagine a malminer with two important abilities: having enough hashrate for producing blocks in a single-miner mode in reasonable amount of time and having a malconfigured miner software which doing ...
2
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2answers
898 views

Preventing sybil attacks : How does bitcoin get to know the computing power of a node?

I know that bitcoin prevents sybil attacks through proof of work - which takes into account the computing power of each participating node . So how does bitcoin get this information ?
1
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2answers
1k views

How proof-of-work detects Sybil attack in Bitcoin?

I read in several paper that PoW deters Sybil attack in Bitcoin. However, there is no enough explanation about how proof-of-work detects Sybil attack in Bitcoin?
14
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2answers
10k views

What's a Sybil attack?

Can anyone please provide a clear definition for what a Sybil attack is? I was asked how the cryptocurrency I am developing would prevent Sybil attacks.
3
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1answer
318 views

How can someone prevent a sybil attack when connecting through TOR?

As I understand it, running sybil BTC nodes through an anonymous network like TOR is much less expensive than in clearnet. This makes it possible that one could be connected to a majority of nodes ...
3
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1answer
433 views

Is Lightning Network vulnerable to sybil attacks?

A dialogue partner of mine claimed that Lightning Network is vulnerable to sybil attacks. He stated that LN needed explicit identities in order to support the "routing" which would cause ending up ...
2
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1answer
718 views

Can we make Sybil attacks virtually impossible?

I suspect that we CAN make them virtually impossible, but that we have not yet done so. We operate on the assumption that computing a private key from the public key is virtually impossible. We also ...
1
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1answer
229 views

How probable is a sybil attack?

I'd like to know what's the probability of a sybil attack and if there are mechanisms built in to prevent this kind of attack?
21
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1answer
550 views

Have any SPV users lost money because they accepted forged bitcoins?

I'm making a list of real-life examples of occasions where bitcoins were lost to various known attacks. One of these known attacks is that lightweight (SPV) wallets can't verify whether a transaction ...
1
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1answer
102 views

Curious about a network-based double-spending attack

In their paper Two Bitcoins at the Price of One? Double-Spending Attacks on Fast Payments in Bitcoin, Karame and Androulaki outline a particular race-attack that involves the slight control over a ...
10
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1answer
2k views

Can I trust the peers I am connected to?

From my understanding of Bitcoin, it operates on a P2P network. Having just downloaded a wallet app, I see it is connected to 6 peers. Does the Bitcoin protocol rely on trusting these peers? What does ...