Other people won ' t know who you voted for unless you make the association of your public key and your identity public . They could even open up a protection service so you can get a public key of a random vote of the desired result and lie to whoever threatening you that that is your vote . Also block chain cannot be changed as long as anyone can be part of the network and get a copy of the ledger , with enough power you can only prevent people from adding new blocks , to actually change the chain you need to crack the hashing algorithm which is still impossible with the current technology . <| sep |> In the moment it was all I had left , plus laptop was beside me . So clicking a few links it ' s really a lot of time