In its most recent effort, the official newspaper of the Workers' Party of (North) Korea called Monday for the repeal of South Korea's anti-communist National Security Law, the Yonhap News Agency reported.
The newspaper called the law "the prime means" employed by the South Korean government to clamp down on its people.
Those and other recent statements were North Korea's way of "trying to create an internal strike in South Korea," said Yang Moo-jin, a political scientist at the University of North Korean Studies.
"By doing so, the North aims to lead the Park [Geun-hye] government to change its policy toward Pyongyang," he said.
Criticisms by North Korea are a "strategic move" aimed at gaining the upper hand in relations between the countries, said Chang Yong-seok, a senior researcher at the Institute for Peace and Unification Studies at Seoul National University.
On Monday, North Korea allowed South Korean technicians to set up wireless communications systems along the border for use at the countries' jointly run industrial park in Kaesong.