[Cypriot President Anastasiades arrives for the Conference on Cyprus at the UN in Geneva]Talks on reunifying Cyprus should produce a "radical" change in the island's security situation, which is currently guaranteed by Greece, Turkey and Britain, Cyprus President Nicos Anastasiades told a news conference in Geneva on Friday. “The fact that the U.N. announcement outlines a clear intent by participants to reach a mutually acceptable solution on the security and guarantee issues… is a mandate to the working groups to process new forms (of guarantees), acceptable and radically different from the guarantee system of 1960," he said.