To construct a secure multiparty computation function, we need to use the cyclic group G = Z*p^2 with p is a large prime. However, we are uncertain that DDH holds over this group.
Can you show that DDH holds/doesn't hold over the cyclic group Z*p^2?
Note that: the order of G is q = p(p-1) and q is multiple of the large prime p.
Thank you very much!