Some North Korean experts believe tough United Nations sanctions that are cutting off most of the isolated North's sources of revenue have added pressure on Pyongyang to engage further with Seoul.
During Mr. Pences visit, Mr. Moon assured the Vice President he would tell the North Koreans clearly that they would not get economic or diplomatic concessions for just talking, only for taking concrete steps toward denuclearization, the newspaper said. The North Korean cheerleaders chanted that same phrase over and over while waving their flags.
The North Korean diplomatic initiative comes amid growing worldwide pressure, led by the United States, aimed at imposing maximum economic and diplomatic pressure on the regime.
President Moon Jae-in, left, talks with Kim Yo-jong, right, the younger sister of North Korean leader Kim Jong-un, while they walk to a luncheon in the Blue House on Saturday.
North Korea is sending 22 athletes, including three Alpine skiers, to the Pyeongchang Games thanks to special entries given by the International Olympic Committee amid rare reconciliation mood between the rival Koreas. North Korea has to make some concessions about its nuclear weapons.
Earlier on Saturday, the Olympic diplomacy seemed to yield an early dividend as Kim Yo-jong, Kim Jong-un's sister and trusted adviser, met with Moon at the presidential Blue House in Seoul in the highest-level contact between the two Koreas in years.
Any summit between the two still-officially warring Koreas would be a coup for Moon, who has been pushing for a diplomatic solution to the standoff over North Korea's nuclear and missile programmes.
Pyeongchang 2018 spokesperson Sung Baik-you refused to confirm the country behind the attack but said: "There was a cyber-attack and the server was updated yesterday during the day and we have the cause of the problem".
The day before the opening ceremony, Kim Jong Un staged a massive military parade with trucks carrying missiles that could be capable of striking the United States mainland.
According to the aide, Moon made no direct mention of the North's nuclear arms program during the meeting on Saturday.
He said war had forged "the core of the bond" between the US and South Korea and that helps explains "why there is no daylight and there will be no daylight" between the two.
Ms Kim, who is though to be about 30 years old, was promoted to the powerful politburo last year.
In a first for the Winter Olympics, North and South Korea athletes are playing on a joint women's hockey team. International Olympic Committee President Thomas Bach called it "a very emotional moment", one that gave him "goosebumps".