A piezoelectric type acceleration sensor which is small in size and has a high charge sensitivity and large static capacitance includes a piezoelectric element having a laminate of more than three piezoelectric layers. The logical storage address is a thin provisioned storage space. The scrambling codes can be compared with each other for cross-correlation purposes to determine whether they meet the specified criterion based on laboratory testing. The user may then realize that they have navigated to an unsecured location and should reconsider their action. The coating comprises a cationic alternate fluorene-based copolymer with phosphonium salt terminal groups embedded in an in-situ cross-linked polymer.