White torture, often referred to as white room torture, is a type of psychological torture technique aimed at complete sensory deprivation and isolation. A prisoner is held in a cell that deprives them of all senses and identity. It is particularly used in Iran; however, there is also evidence of its use by Venezuelan and United States intelligence services.

Solitary confinement is a form of imprisonment in which an incarcerated person lives in a single cell with little or no contact with other people. It is a punitive tool used within the prison system to discipline or separate incarcerated individuals who are considered to be security risks to other incarcerated individuals or prison staff, as well as those who violate facility rules or are deemed disruptive. However, it can also be used as protective custody for incarcerated individuals whose safety is threatened by other prisoners. This is employed to separate them from the general prison population and prevent injury or death.