There's no way to read his mind, so how should the foreigners respond?
This is not a theoretical question, for he is sending out those signals. In his televised New Year's message to the Korean people, he spoke of the need to "remove confrontation between the North and the South", and called for dramatic improvements in the national economy.
Unfortunately, since he's not making any political or economic reforms at home at the moment - that's what he might do if he had foreign help - we can't conclude anything about his intentions from his domestic policies. And his foreign policy is hardly encouraging either.
North Korea doesn't have much by way of a foreign policy. The only consistent thread is its obsession with military power (it has one of the world's biggest armies, though it has about the population of Australia), and latterly with ballistic missiles and nuclear weapons.
On the other hand, here is a man whose only claim to power is heredity. To consolidate his power, he must persuade the military and party elites that he is a reliable successor who will perpetuate the system that keeps them fat and happy, so his current aggressive posture in foreign policy is really no guide to his real intentions either.
In fact, at this point there is really no way of telling what he means to do. The rest of the world, and in particular the United States and North Korea's neighbours, South Korea, China and Japan, are going to have to make their decisions blind.
What can they do that would help Kim Jong Un to bring the country out of its cave and start loosening the domestic tyranny, without actually making matters worse if he is not a secret reformer?
The safest course would be to encourage dialogue between North and South Korea (which has just elected a new president, Park Geun Hye, who has declared her presidency ready to initiate unconditional talks with the North).
It would also be sensible to ease back on the embargoes and other restrictions on North Korean imports for a while, since they are obviously achieving nothing in terms of stopping its weapons projects anyway.
And what if Kim Jong Un dares not or simply does not want to respond to these gestures with more promising moves himself? Then you just give up and go back to the policy of containment that has had so little success over the years.
North Korea is really a very small threat (except for its own people, of course), and it's safe to take a little risk in the hope that the new ruler will respond.
It's the country's only hope. There is not going to be a North Korean spring in the Arab style.
Gwynne Dyer is an independent journalist whose articles are published in 45 countries.
