In embodiment 20, the current address is {TAIL ~ a random number} from {HEAD ~ a pseudo} random generator 22; in the other embodiment 30, the current address is the number stored at a specific memory location in memory 32 
In embodiment 20 , the current address is { TAIL ~ a random number } from { HEAD ~ a pseudo } random generator 22 ; in the other embodiment 30 , the current address is the number stored at a specific memory location in memory 32
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH