Un nuovo articolo di ricerca sul tema, finanziato inter alia dal (mitico) governo estone, e’ stato pubblicato il 17 luglio, una settimana dopo che avevo scritto Usare la blockchain per registrare i voti.

Lo ho scorso velocemente. Mi pare molto centrato su aspetti tecnici implementativi, a differenza del mio post che era su una questione di fondo (questione di fondo che non mi pare toccata da questo paper): Il mio post e’ teso ad alzare una bandierina sugli aspetti di possibile rilevanza giuridica riguardo automatismi decisionali nel caso di sistemi che strutturalmente 1) abilitano voto di scambio o 2) richiedono fiducia in un gestore terzo.

On Trade-offs of Applying Block Chains for Electronic Voting Bulletin Boards

Abstract.
This paper takes a critical look at the recent trend of building electronic voting systems on top of block chain technology. Even though being very appealing from the election integrity perspective, block chains have numerous technical, economical and even political drawbacks that need to be taken into account. Selecting a good trade-off between desirable properties and restrictions imposed by different block chain implementations is a highly non-trivial task. This paper aims at bringing some clarity into performing this task. We will mostly be concentrating on public permissionless block chains and their applications as bulletin board implementations as these are the favourite choices in majority of the recent block chain based voting protocol proposals.

Conclusioni:

We would like to conclude the paper by citing Josh Benaloh [32]:

I find myself debunking a blockchain voting effort about every few weeks.
It feels like a very good fit for voting, until you dig a couple millimeters below the surface.

Even though such a statement may be a bit too categorical, we agree that in all of the proposals we considered, many of the shortcomings and trade-offs of block chains were addressed insufficiently. Considerably deeper research is required to settle a good design for a block chain based electronic voting system.

Acknowledgements

The research leading to these results has received funding from the Estonian Research Council under Institutional Research Grant IUT27-1, European Union’s Horizon 2020 research and innovation programme under grant agreement No 780477 (project PRIViLEDGE), and the European Regional Development Fund through the Estonian Centre of Excellence in ICT Research (EXCITE) and the grant number EU48684.