A former high-ranking North Korean official says that if only 0.1 percent of pro-Pyongyang students in South Korea can experience life in the North, they would use more caution when speaking.

Hwang Jang-yop, who was once the number two man in the North, on Thursday said it is extremely unfortunate that some South Korean students only follow the lies from the followers of the North's leader Kim Jong-il.

Defecting to South Korea in 1997, he gave the opening speech in a global conference on the North's human rights in Seoul.

He said Pyongyang tramples on people's rights from the time a baby speaks and does everything to spiritually enslave them to Kim, adding the North's public is completely unaware of the regime's tyranny and crimes against humanity.

Hwang said Kim and his inner circle are trying to expand their clout over Seoul, adding the 2000 inter-Korean declaration follows that direction under the guise of cooperation and was made possible by sympathetic forces in South Korea.