<p>One can verify legitimacy of a Bitcoin branch simply by checking proof-of-work of the block headers. In Nxt it's necessary to know who the owner of the coins, so the whole blockchain data must be downloaded.</p>

<p>This seems to be the only fundamental pitfall that arises from very nature of Proof-of-Stake cryptocurrencies.</p>

CC BY-SA 3.0
2014-07-15T06:39:07.930Z
2014-07-15T06:39:07.930Z
Come-from-Beyond
<p>Bitcoin has the vulnerability of a 51% attack for a proof of work currency, but what pitfalls does a 100% proof of stake (pos) currency have like NXTcoin?</p>

<security><nxt>
What are some of the pitfalls of a 100% proof of stake currency (pos) like NXT?
Patoshi パトシ
# What are some of the pitfalls of a 100% proof of stake currency (pos) like NXT?

(Asked by: username_0 on 2014-07-14)

Bitcoin has the vulnerability of a 51% attack for a proof of work currency, but what pitfalls does a 100% proof of stake (pos) currency have like NXTcoin?

**Tags:** security, nxt


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## 1 answers

### Answer by username_1 on 2014-07-15. Score: 3

One can verify legitimacy of a Bitcoin branch simply by checking proof-of-work of the block headers. In Nxt it's necessary to know who the owner of the coins, so the whole blockchain data must be downloaded.

This seems to be the only fundamental pitfall that arises from very nature of Proof-of-Stake cryptocurrencies.


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