57 countries signed a United Nations convention banning governments from holding people in secret detention. The convention focuses on the arrest, detention or kidnapping of a person by state agents followed by denials about the detention or location of the individual.
But the United States refused to sign, claiming that the convention "did not meet [its] expectations." I guess it is still too attached to its Maher Arar-style renditions policy, and its secret CIA prisons.
Contrast this with the attitude of the pope, who, in his World Day of Peace address noted that the United Nations is charged with protecting human rights, and the 1948 Universal Declaration embodies those rights, which are "not simply on the decisions of the assembly that approved them, but on man's very nature and his inalienable dignity as a person created by God."