The pair met in Russian city of Vladivostok yesterday in their first ever face-to-face encounter.
They appeared to get on well, with the Russian President describing Kim as “quite open”, “thoughtful” and “interesting”.
Away from the cameras, the North Korean tyrant made his true feelings about the US known after talks broke down in February.
Washington and Pyongyang walked away from a summit in Vietnam with no deal reached on North Korea’s nuclear weapons.
Kim reportedly told Putin that “the situation on the Korean peninsula and the region is now at a standstill and has reached a critical point”.
He warned the situation “may return to its original state as the US took an unilateral attitude in bad faith” during recent talks.
Kim continued: “Peace and security on the Korean peninsula will entirely depend on the US future attitude, and the DPRK will gird itself for every possible situation.”
Putin said that Russia also wants to reduce tension on the Korean peninsula.
But he insisted the North needed “guarantees of its security, the preservation of its sovereignty”.
“Peace and security on the Korean peninsula will entirely depend on the US future attitude”
“We need to… return to a state where international law, not the law of the strongest, determines the situation in the world”, Putin said.
Putin has now accepted an invitation to visit North Korea, its state media reports.
It did not clarify a time or location, only that it will take place “at a convenient time”.
Earlier talks between the US and North Korea reportedly broke down after Kim demanded full sanctions relief – a commitment the US was not willing to make.
During Thursday’s summit, Putin offered to act as an intermediary between the countries and also called for full de-nuclearisation along the Korean Peninsula.