A UUID generator uses a complex algorithm, which takes into account factors, such as the current date and time, to produce a hexadecimal number that has a statistical guarantee of uniqueness.
Procedural due process. Principle required by the Constitution that when the state or federal government acts in such a way that denies a citizen of a life, liberty, or property interest, the person must first be given notice and the opportunity to be heard. See Due Process.
Substantive due process. A doctrine holding that the 5th and 14th Amendments require all governmental intrusions into fundamental rights and liberties be fair and reasonable and in furtherance of a legitimate governmental interest.