e-Gulden (EFL)

e-Gulden is a project that was initiated by a group of students in the Netherlands. Their mission was to present a local alternative to the Euro and Bitcoin. In July 2014, a group of volunteers set up the Electroniic Gulden foundation. The current focus of the Electronic Gulden Foundation is community building, especially within the Dutch community.

Its approach towards addressing the 51% attack vulnerability inherent in PoW coins was through the use of an "oeruschield" extension, named after two e-Gulden core-developers. This shield entails "identified mining". Dutch companies registered with the Dutch Chamber of Commerce can reportedly request certification to be allowed to operate a certified mining pool,1 in 6 e-gulden blocks must be mined by a certified mining pool. Currently, 3 such pools are operational. These mining pools reportedly control 1/6 of the e-gulden network difficulty.