U.S Department of State: Country Reports on Human Rights Practices - 2007

http://www.state.gov/g/drl/rls/hrrpt/2007/100595.htm

... On January 11, former political prisoner Kianush Sanjari alleged that he was subjected to "white torture," a form of sensory deprivation, while detained at Evin Prison in late 2006. According to a 2004 HRW report, political prisoners in the country used the term to describe prolonged incommunicado solitary confinement. ...