South Korea's nuclear envoy, who's currently in Washington, has revealed North Korea has recently shifted the emphasis of its negotiations with the U.S. from sanctions relief to security guarantees.<br />The North has described it as a "new calculation method."<br />President Trump seems to like the new approach,... saying the new strategy could help expedite the resumption of talks.<br />Lee Seung-jae reports. <br /> Speaking to reporters upon his arrival in Washington on Thursday, local time,... South Korea's top nuclear envoy Lee Do-hoon said there's been a shift in what North Korea may demand during their upcoming talks with the United States.<br />While sanctions relief was once the core focus of Pyeongyang's demands,... it has shifted that priority to a security guarantee from the U.S.<br />However, Lee said Washington will have to find out exactly what North Korea's demands for a "new calculation method" is when the two sides resume their working-level talks.<br /> Speaking to reporters on Wednesday,... President Trump suggested that a "new method" of focusing more on a security guarantee could help break the impasse in the denuclearization negotiations. <br />The remarks came as he criticized his former National Security Advisor, John Bolton, for advocating the 'Libyan model' in talks with the North.<br />The Libya model calls for North Korea to unilaterally dismantle its nuclear weapons program before receiving any concessions,... which Pyeongyang viewed as a threat to topple the regime.<br /> Denuclearization talks are expected to resume later this month,... although nothing has been scheduled yet. <br />Pyeongyang earlier demanded the U.S. come up with a "new calculation method" and renewed calls for security guarantees and sanctions relief.<br />Lee Seung-jae, Arirang News. <br />