Elliptic Curve, Diffie Hellman, Discrete Log, Elgamal Encryption.
Discrete Log Problem When I ask you to find the base 2 logarithm of 128, you can start dividing 128 repeatedly by 2 to find the answer. Even if the number is not a power of 2 we can still get an idea of where the answer will be like between 4 and 5. However, if we study 2^x mod n, you cannot find a