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Suppose you compute using the algorithm for modular exponentiation discussed in lecture and shown below: modExp ( b , n , m ) : x
Suppose you compute
using the algorithm for modular exponentiation discussed in lecture and shown below:
modExpb n m:
x
p b mod m
for i :k:
if ai :
x x p mod m
p p p mod m
return x
Recall that, the algorithm assumes we know or can find the binary expansion of n so that n ak ak a If the initial values of x and p are and respectively, select all the possible values that p will attain at some iteration of the algorithm.
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