CieSign is the app developed by the Poligrafico e Zecca dello Stato Italiano for the advanced electronic signature (FEA) with the Electronic Identity Card (CIE) and devices equipped with an NFC interface. The art. 61 of the Prime Ministerial Decree of 22 February 2013 allows the use of the CIE as an advanced electronic signature tool for public administration services and activities. Furthermore, the CIE, widely used as a strong identification method for authentication for public administration