[Fando]

I'm not well versed on developments in blockchain tech. Could someone here help explain whether this is good news and which specific problems, if any, would this technology help solve. For example, could this be applied to provide secure online voting systems? I like that proof of work protocols are inherently safe as long as majority computing power is 'good'. Could such decentralized security technologies replace the currently centralized ones completely, for example, certificate authorities? Please pardon my ignorance, I'm eager to learn.