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Security Audit Needed #54

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gmkarl opened this issue Mar 7, 2016 · 5 comments

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@gmkarl
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commented Mar 7, 2016

Since Qora was created, there have been a number of issues identified in the basic concept of the proof-of-stake blockchain. Other projects have found solutions to these issues, but most of these solutions have not been integrated into Qora.

Qora is in need of somebody experienced in proof-of-stake issues to bring it to the same level of security as the other chains. The development focus on features has provided incredible quality here, but there should be verification that Qora does not suffer from, for example, the simple nothing-at-stake issue.

@icreator

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commented Mar 7, 2016

""projects have found solutions" - about what you say?
" nothing-at-stake issue" - in NEXT?? NEM?

@gmkarl

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commented Mar 7, 2016

https://en.wikipedia.org/wiki/Proof-of-stake#Criticism NXT ensures that forks will not happen below the top 720 blocks, so history older than 720 blocks cannot be changed via the nothing-at-stake issue.

NXT also has a great feature it calls "cumulative difficulty" which prevents forking of a long chain by an immature short chain.

Basically I am saying that Qora is in need of somebody to evaluate the PoS implementation and plug any possible well-understood issues in the PoS communities and report that they are plugged.

@soliury

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commented Mar 8, 2016

+1

@icreator

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commented Mar 8, 2016

in POS Coins: if new chain was created (hard fork) - it may kill first blockchain in any case!
This problem not solved in ALL POS coins and can not be solved

@gmkarl

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commented Mar 8, 2016

@icreator what are you talking about? that is not a serious issue in all major PoS chains

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