A cryptocurrency expert who gave a talk at a Pyongyang conference has admitted conspiring to help North Korea evade sanctions.
The US Department of Justice said he had "jeopardised the national security of the United States" by undermining sanctions, reports BBC.
His lawyer told the Wall Street Journal Griffith was "sincerely remorseful."
In April 2019, Griffith attended the Pyongyang Blockchain and Cryptocurrency Conference, with about 100 other attendees.
He had applied for permission to travel to North Korea - but when this was refused, he went anyway, reaching the country via China.