The invention provides an
encryption and decryption functions based
field service terminal, which comprises a control
processing unit, a main-
station communication unit, an equipment
communication unit, a
power supply unit, an input and output unit, a safety unit and a
smart card reading and writing unit. The control
processing unit is respectively connected with the control
processing unit, the main-
station communication unit, the equipment communication unit, the
power supply unit, the input and output unit, the safety unit and the
smart card reading and writing unit. The safety unit is used for completing identity
authentication and
encryption and decryption of
data information when the
field service terminal is in communication with a main
station and power energy meters, and the
smart card reading and writing unit is used for field card writing and recharging of local charge-control
smart power energy meters. The
encryption and decryption function based
field service terminal has the advantages that field
service efficiency and quality are improved; the safety unit is added, so that transmission data of the field service terminal cannot be distorted, data
confidentiality and integrity cannot be damaged and identities of users cannot be used falsely; and the requirement of power-utilization information acquiring
system construction for power consumers can be met basically.