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BU Messages & BU Caches BU Messages BU = {CoAm, CN, HoAm-1, seq#m, im, jm, MACm} (1) and HoAm = (Prefix of CoAm) | (Hash(km | HoA) ) (2) (64 bits) (64 bits) where m=1, 2, 3, … …, and HoA0 = HoA (real) BU Caches Cache in CN HoAm (as index) km (BU key) HoA CoAm …… Cache in MN HoAm km (BU Key) CN HoA CoAm …… |