At present online voting systems have not yet appeared in mass use especially on the state level, though there is a record of successful practice in many countries.
The U.S. has extensive practice with this format of voting, however, it is often criticized due to the absence of uniform standards for electronic voting on the territory of the country, as well as due to the risks of possible hacker attacks.
Switzerland has long ago successfully been using Internet voting in a number of cantons. This format of voting is highly relevant for Switzerland since the citizens take part in the elections 4 to 6 times a year.
Great Britain also doesn't steer clear of new information technologies. Integration of electronic voting in Great Britain was launched in 1997, with the first local elections based on online technologies held in 2000. Then again, online voting still has not been practiced
on the high state level in Great Britain.
Meanwhile, the most interesting experience, for now, is the practice of Estonia. The country introduced online-voting on the state level and it works as follows:
Each citizen of Estonia, who is entitled to vote, receives a special ID card with a built-in chip - sort of a registration key. The voter can thus use it to log in from any computer or smartphone with internet access.
Voting takes place on a special voting website. After voting the person can immediately track the process of distribution of votes. What is especially important, one can always check the distribution of his/her vote, as well as the time of its registration.
Estonian system of online voting has been attracting criticism for possible vulnerable aspects, but Estonia found a solution - at the end of 2017, the government of Estonia announced the integration of blockchain technology into the voting system. This eliminated the risk of manipulating the results and increased the level of system protection.