North Korea lashed out at South Korea's draconian security law on Monday, saying that improving inter-Korean relations is impossible without abolishing the decades-old law.

The criticism comes as Monday marks 66 years since the enforcement of the National Security Law in 1948 when the Korean Peninsula was divided into the capitalist South and the communist North. 

The law bans any "anti-state" activities that attempt to praise, encourage or propagandize North Korean political ideals.

"The National Security Law criminalizes free movements between South and North Korea as well as any (inter-Korean) contact, dialogue, sympathizing, communication and correspondence," the Rodong Sinmun, an organ of the North's ruling party, said in a commentary. 

"Without abolishing the malicious national security law that hampers the democratization and unification, there could not be democracy and human rights in the South Korean society as well as improvement of inter-Korean ties," the newspaper noted. 

The grip of the security law became even more threatening under the Park Geun-hye administration, the Rodong Sinmun said, referring to the government's legal attempt to dissolve the Unified Progressive Party, a minor far-left party.

In a separate commentary, the Rodong Sinmun again slammed the party dissolution efforts, saying the move is an unprecedented, fascist plot. 

South Korea's Justice Ministry filed a petition with the Constitutional Court last year to disband the left-wing party, citing the arrest of some party members on rebellion conspiracy charges. (Yonhap)