This was already addressed by the research comminuty: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.105.8000&rep=rep1&type=pdf http://citeseerx.ist.

This was already addressed by the research comminuty: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.105.8000&rep=rep1&type=pdf http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.105... In other words, you can set things up so that no single authority can fail in a way that would cause the entire system to fail. You can have N authorities such that a minimum of K are needed to keep the system working.