The founder of the commercial spyware firm Intellexa, recently convicted in a landmark wiretapping trial, says his company sells its technology exclusively to governments—an admission opposition leaders claim proves the state orchestrated a massive domestic espionage campaign.

In what became known as "Greece's Watergate", surveillance software called Predator was used to target 87 people.

Four people go on trial accused of misdemeanours but opponents ask why no government officials have been charged.