TEHRAN, Iran – Iran ratcheted up its defiance ahead of a U.N. Security Council deadline to suspend uranium enrichment, threatening Tuesday to hide its program if the West takes “harsh measures” and to transfer nuclear technology to chaos-ridden Sudan.

Ali Larijani, the top Iranian nuclear negotiator, also renewed a vow to end cooperation with the U.N. nuclear watchdog agency and said increasing pressure on Iran would only stiffen its resolve.

“If you take harsh measures, we will hide this program. If you use the language of force, you should not expect us to act transparently,” Larijani said, adding that Western nations “have to understand they cannot resolve this issue through force.”

Secretary of State Condoleezza Rice fired back almost immediately, saying, “Iranians can threaten, but they are deepening their own isolation.”

Top leader Ayatollah Ali Khamenei made the offer to transfer nuclear technology at a meeting Tuesday with Sudanese President Omar al-Bashir.

“Iran’s nuclear capability is one example of various scientific capabilities in the country. … The Islamic Republic of Iran is prepared to transfer the experience, knowledge and technology of its scientists,” Khamenei told al-Bashir.

Al-Bashir said last month that his impoverished, violence-ridden country was considering a nuclear program to generate electricity.

Such a technology transfer would be legal as long as it is between signatory states to the nuclear nonproliferation treaty, and the International Atomic Energy Agency is informed.

The United States has not openly threatened military action against Iran and says it wants a diplomatic solution. But President Bush has said all options, including military force, remain on the table.

Russia, meanwhile, launched a satellite Tuesday for Israel that the Israelis say will be used to spy on Iran’s nuclear program. The satellite is designed to spot small images on the ground and would allow Israel to monitor Iran’s nuclear program and long-range missiles, an Israeli defense official said.