Zech's Logarithms
Zech logarithms are used to implement addition in finite fields when elements are represented as powers of a generator .
Zech logarithms are also called Jacobi Logarithm, after Jacobi who used them for number theoretic investigations (C.G.J.Jacoby, "Über die Kreistheilung und ihre Anwendung auf die Zahlentheorie", in Gesammelte Werke, Vol.6, pp. 254–274).
Read more about Zech's Logarithms: Definition, Uses, Examples