Online voting prevent cheat brush ticket method

Online voting brush votes more flooding, the general brush ticket software is through the change of IP, submit a POST request, so the cost of the brush ticket is too low, the browser does not have to open, in fact, with the IP anti-brush ticket itself is not very good, in fact, User-agent is actually more convenient, In particular, the mobile-side user-agent can simply identify a user, after all, a small area involved, a company, a car look around you the proportion of mobile phone installed is quite small, and user-agent also and operating system version of the operating system browser version of a lot of projects related, Key forgery User-agent brush ticket software is less, this is not to say no forgery, the problem is that the fake IP is real, no matter how the IP changes, he is there, but forged change user-agent is not necessarily or the cost is greater, estimated who will not write a Because you faked it, software design is unreasonable.

It is also said that the user-agent of the ticket software is limited unless manually updated.

A step further if the client generates a timestamp and a fixed string generates a unique ID for each poll, the server accepts the validity of the validation timestamp, and does not underestimate the timestamp plus the string, even if the parameters of the ticket software post can be calculated, the time cost of the swipe ticket greatly increases the most important thing to filter out the non-professional people.

Online voting prevent cheat brush ticket method