<p>Usually Denial Of Service(DoS) attack may take place on larger sized blocks.So to avoid this condition initially block size Bitcoin was chosen to be 1Mb. Because attacker sends a lot of data in the network to make it busy so that the actual transactions are not able to take place.
Along with reducing block size other methodology which is adopted in Bitcoin are:</p>

<ul>
<li>No forwarding of orphaned blocks</li>
<li>No forwarding of double-spend transactions</li>
<li>No forwarding of same block or transactions</li>
<li>Disconnect a peer that sends too many messages</li>
<li>Restrict the block size to 1 MB</li>
<li>Limit the size of each script up to 10000 bytes</li>
</ul>

CC BY-SA 4.0
2023-04-22T05:54:37.157Z
On which evidence is the statement "Usually DoS attack may take place on larger sized blocks" based?
OneArb
CC BY-SA 4.0
2018-09-06T15:57:24.300Z
2018-09-06T15:57:24.300Z
VforVendetta
<p>I have read this in several articles that larger block sizes makes adversarial attacks easier. What I wonder is why is that so obvious? is it because in a larger block the number of transactions could increase to a number that it becomes hard to validate each one of them?</p>

<blockchain><block-size-increase><blocksize>
Why does a larger block size infer a bigger attack vector
thenakulchawla
# Why does a larger block size infer a bigger attack vector

(Asked by: username_0 on 2017-07-26)

I have read this in several articles that larger block sizes makes adversarial attacks easier. What I wonder is why is that so obvious? is it because in a larger block the number of transactions could increase to a number that it becomes hard to validate each one of them?

**Tags:** blockchain, block-size-increase, blocksize


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## 1 answers

### Answer by username_1 on 2018-09-06. Score: 1

Usually Denial Of Service(DoS) attack may take place on larger sized blocks.So to avoid this condition initially block size Bitcoin was chosen to be 1Mb. Because attacker sends a lot of data in the network to make it busy so that the actual transactions are not able to take place.
Along with reducing block size other methodology which is adopted in Bitcoin are:

* No forwarding of orphaned blocks
* No forwarding of double-spend transactions
* No forwarding of same block or transactions
* Disconnect a peer that sends too many messages
* Restrict the block size to 1 MB
* Limit the size of each script up to 10000 bytes

> **Comments:**
> **username_2**: On which evidence is the statement "Usually DoS attack may take place on larger sized blocks" based?  

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