Distributed hash tables (DHTs) are usually used in the open networking environment. where they are vulnerable to Sybil attacks. Pebble-Rotating Game (PRG) mixes the nodes of the honest and the adversarial randomly. and can resist the Sybil attack efficiently. https://www.bekindtopets.com/flash-grab-Florida-State-University-Logo-Gold-Baller-Headband-super-value/