Discrete logarithm of the cyclic group
= Discrete logarithm of the cyclic group
This is the <discrete logarithm> problem where the group is a <cyclic group>.
In this case, the problem becomes equivalent to reversing <modular exponentiation>.
This computational problem forms the basis for <Diffie-Hellman key exchange>, because <modular exponentiation> can be efficiently computed, but no known way exists to efficiently compute the reverse function.