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
Comments: 

Internet voting (I-voting or online voting) is one of the possibilities to vote in addition to other voting methods. I-voting means in this context voting via Internet, not voting by using a special voting device.

Source: 

Estonia, 'The Estonian Electoral Office (Valimised) Website', Internet voting in Estonia, accessed 7 February 2019