Universal jurisdiction is a controversial principle in international law, whereby states claim criminal jurisdiction over people whose alleged crimes were committed outside the boundaries of the prosecuting state, regardless of nationality, country of residence or any other relationship to the prosecuting country. The state backs its claim on the grounds that the crime committed is considered a crime against all, which any state is authorized to punish. The concept of universal jurisdiction is therefore closely linked to the idea that certain international norms are "erga omnes", or owed to the entire world community, as well as the concept of "jus cogens".