The programmer was found guilty of helping North Koreans use cryptocurrencies to evade sanctions.
Late last year, Griffith pleaded guilty to one count of conspiracy to violate international sanctions against the country.
He was arrested in November 2019 after appearing at a cryptocurrency conference in the country’s capital of Pyongyang.
Such crimes normally receive jail times of up to 20 years but the developer’s plea deal helped to lower the sentence to a range of 63 to 78 months.
Griffith has already been in custody for about two years but was released on bail for 14 of those months.
