A method is disclosed for asymmetric security in data communications between two or more nodes. When a fingerprint is inputted from a fingerprint reading surface of a displayfingerprint reading unit, a fingerprint data sensing control unit reads fingerprint data and coordinate data, and stores the data into a storage unit. and a second monomer that copolymerizes with the first monomer and which has a glass transition temperature greater than 25\xb0 C. When the lock body is in an unlocked state, the lock body allows the driving portion to move the rotatable fastener. NP’s are capable of Gd-ion uptake forming a particle with suitable molecular relaxivity. During the test mode, test data values are written to the RAMregister blocks by broadcasting test data values to all of the RAMregister blocks on the test bus.