North Korea supplied nuclear software to Iran: German paper

North Korea has supplied Iran with a computer programme as part of intensified co-operation that could help the Islamic Republic build nuclear weapons, a German newspaper reported on Wednesday, citing Western intelligence sources. The Sueddeutsche Zeitung said North Korea had in the spring delivered software, originally developed in the United States, that could simulate neutron flows.
Such calculations, linked to identifying a chain reaction, are vital in the construction of reactors and also in the development of nuclear explosives. With the help of the programme, Iran could gain important knowledge of how to construct nuclear weapons, according to the Munich newspaper, which quoted no individual source.