A former US researcher at a cryptocurrency group has been sentenced to more than five years in prison for conspiring to help North Korea evade US sanctions using cryptocurrency.
Virgil Griffith had earlier pleaded guilty to conspiring to violate US law.
He formerly worked for the Ethereum Foundation, a non-profit organisation focused on the technology behind the cryptocurrency ether.
The sentence was the minimum amount of prison time sought by prosecutors.
He was also fined $100,000 (£76,864). The 39-year-old had been facing a maximum sentence of 20 years in prison and a $1m fine.
His lawyer said in a statement that while the sentence was disappointing, the judge
"acknowledged Virgil's commitment to moving forward with his life productively, and that he is a talented person who has a lot to contribute."
US Attorney Damian Williams said in a statement that "justice has been served."
In September, Griffith pleaded guilty to conspiring to violate the US International Emergency Economic Powers Act by traveling to North Korea's capital Pyongyang to give a presentation on blockchain technology.
US cryptocurrency expert jailed for helping North Korea evade sanctions
Virgil Griffith was sentenced to five years and three months in prison by a court in New York.
www.bbc.co.uk