What about using fraud proofs? Your coinbase only matures if nobody publishes proof that you signed a competing block.
Then something is at least at stake. When it's your chance to sign a block, attempting to sign and publish more than one at the same height reliably punishes you (you effectively waste your chance and receive no reward.) I can't remember who I saw discussing this idea. Might have been Vitalik Buterin? On 27 April 2014 6:39:28 AM AEST, Mark Friedenbach <m...@monetize.io> wrote: >There's no need to be confrontational. I don't think anyone here >objects >to the basic concept of proof-of-stake. Some people, myself included, >have proposed protocols which involve some sort of proof of stake >mechanism, and the idea itself originated as a mechanism for >eliminating >checkpoints, something which is very much on topic and of concern to >many here. > >The problems come when one tries to *replace* proof-of-work mining with >proof-of-stake "mining." You encounter problems related to the fact >that >with proof-of-stake nothing is actually at stake. You are free to sign >as many different forks as you wish, and worse have incentive to do so, >because whatever fork does win, you want it to be yours. In the worst >case this results in double-spends at will, and in the best case with >any of the various proposed protections deployed, it merely reduces to >proof-of-work as miners grind blocks until they find one that names >them >or one of their sock puppets as the signer of the next block. > >I sincerely doubt you will find a solution to this, as it appears to be >a fundamental issue with proof-of-stake, in that it must leverage an >existing mechanism for enforced scarcity (e.g. proof-of-work) in order >to work in a consensus algorithm. Is there some solution that you have >in mind for this? > >Mark > >On 04/25/2014 12:33 AM, Troy Benjegerdes wrote: >> Do it. Someone will scream harm. The loudest voices screaming how it >would >> be harmful are doing the most harm. >> >> The only way to know is build it, and test it. If the network breaks, >then >> it is better we find out sooner rather than later. >> >> My only suggestion is call it 'bitstake' or something to clearly >differentiate >> it from Bitcoin. This also might be an interesting application of the >side >> chains concept Peter Todd has discussed. >> >> On Thu, Apr 24, 2014 at 04:32:15PM -0700, Stephen Reed wrote: >>> Hello all. >>> >>> I understand that Proof-of-Stake as a replacement for Proof-of-Work >is a prohibited yet disputed change to Bitcoin Core. I would like to >create a Bitcoin branch that provides a sandboxed testbed for >researching the best PoS implementations. In the years to come, perhaps >circumstances might arise, such as shifting of user opinion as to >whether PoS should be moved from the prohibited list to the hard-fork >list. >>> ----- >>> >>> A poll I conducted today on bitcointalk, >https://bitcointalk.org/index.php?topic=581635.0 with an >attention-grabbing title suggests some minority support for Bitcoin >Proof-of-Stake. I invite any of you to critically comment on that >thread. >>> >>> "Annual 10% bitcoin dividends can be ours if Proof-of-Stake full >nodes outnumber existing Proof-of-Work full nodes by three-to-one. What >is your choice?" >>> >>> "I do not care or do not know enough." - 5 (16.1%) >>> "I would download and run the existing Proof-of-Work program to >fight the change." - 14 (45.2%) >>> "I would download and run the new Proof-of-Stake program to favor >the change. " - 12 (38.7%) >>> Total Voters: 31 >>> ----- >>> >>> Before I branch the source code and learn the proper way of doing >things in this community, I ask you simply if creating the branch is >harmful? My goal is to develop, test and document PoS, while exploring >its vulnerabilities and fixing them in a transparent fashion. >>> >>> Thanks for taking a bit of your time to read this message. >> >> >> >> > >------------------------------------------------------------------------------ >Start Your Social Network Today - Download eXo Platform >Build your Enterprise Intranet with eXo Platform Software >Java Based Open Source Intranet - Social, Extensible, Cloud Ready >Get Started Now And Turn Your Intranet Into A Collaboration Platform >http://p.sf.net/sfu/ExoPlatform >_______________________________________________ >Bitcoin-development mailing list >Bitcoin-development@lists.sourceforge.net >https://lists.sourceforge.net/lists/listinfo/bitcoin-development -- Sent from my Android device with K-9 Mail. Please excuse my brevity. ------------------------------------------------------------------------------ Start Your Social Network Today - Download eXo Platform Build your Enterprise Intranet with eXo Platform Software Java Based Open Source Intranet - Social, Extensible, Cloud Ready Get Started Now And Turn Your Intranet Into A Collaboration Platform http://p.sf.net/sfu/ExoPlatform _______________________________________________ Bitcoin-development mailing list Bitcoin-development@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/bitcoin-development
