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Jörg F. Wittenberger [LibreList] Re: Trustworthy Contract Handling - Comparison Of Approaches 2014-08-03 14:56:05 (6 years 8 mons 2 days 16:15:00 ago)
Hi all,

sorry for following up my own post.  (So far I got some responses, 
though not via the list.)

I gather that this might be interesting to the list too:

Am 29.07.2014 09:57, schrieb "Jörg F. Wittenberger":
> Hi all,
>
> I'm gathering infos for a comparison of approaches towards 
> trustworthy, tamper-proofed autonomous systems.
>
> So far I have in alphabetic order: Askemos/Wallet, Bitcoin, Ethereum, 
> OpenTransactions, Ricardian Contracts.
>
> What about: Drogulus, does it do contracts? Which did I miss?

Nicholas: does Drogulus have an idea about contracts?  Should I include 
it in the comparison or does it not qualify?  I'm not sure. See here:
http://ball.askemos.org/?_v=wiki&_id=1786

Not related to Drogulus but to trustworthy (a.k.a. trustless) contract 
handling, one more note.

I ran into codius.  That's interesting too; see the white paper:
https://github.com/codius/codius/wiki/Smart-Oracles:-A-Simple,-Powerful-Approach-to-Smart-Contracts#multiple-untrusted-host-model

 > for example, one could use a 7-of-10 scheme that allows for up to 
three oracles to behave maliciously, be offline, or even be hacked 
without affecting the execution of the contract.

This is the same concept as Askemos deploys.  However: when written like 
this, one might assume the 7 was a number one could choose arbitrarily.  
That's an unfortunate wording.  One could assume the 6-of-10 could work 
as well.

However see Leslie Lamport in the1980 paper
http://research.microsoft.com/en-us/um/people/lamport/pubs/reaching.pdf
byzantine fault tolerance requires *at least* seven out of ten votes.  
Maybe it's worth noting to avoid confusion.

Best Regards

/Jörg

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