What is the current state of the law on privacy rights for inmates in prisons?

"A right of privacy in traditional Fourth Amendment terms is fundamentally incompatible with the close and continual surveillance of inmates and their cells required to ensure institutional security and internal order." Hudson v. Palmer, 468 U.S. 517, 527-28 (1984). "The recognition of privacy rights for prisoners in their individual cells simply cannot be reconciled with the concept of incarceration and the needs and objectives of penal institutions." Id. at 526.