Review: Shafi Goldwasser, Silvio Micali, Charles Rackoff, The Knowledge Complexity of Interactive Proof Systems ; Oded Goldreich, Silvio Micali, Avi Wigderson, J. Gruska, B. Rovan, J. Wiedermann, Proofs that Release Minimum Knowledge ; Oded Goldreich, Rolf Herken, Randomness, Interactive Proofs, and Zero-Knowledge--A Survey