If e-voting is currently being used, what type(s) of technology used? - Estonia

Country: 
Estonia
Question: 
If e-voting is currently being used, what type(s) of technology used?
Answer: 
Internet voting systems
Source: 
Riigikogu Election Act, 2002, Chapter 7.1: https://www.riigiteataja.ee/en/eli/ee/Riigikogu/act/510032014001/consolide

http://www.smartmatic.com/case-studies/article/estonian-elections-2004-2015/