The invention relates to a dynamic graphical
password lock, a
server, a sharing
system and unlocking and locking methods, the dynamic graphical
password lock includes a MCU, a display screen, an
input device, an electric lock and a
power supply unit; wherein the MCU is used to generate a graphic code containing an
encryption lock code, switch the work mode, judge the current state of the
password lock and control operation of the electric lock, the
input device and the display screen; the display screen is used to display the graphic code generated by the MCU and promote a user to lock, the
input device is used to inputting of a wake up instruction and an unlock password; the electric lock is used for unlocking according to control of the MCU and locking according to operation of the user; and the
power supply unit is used for power supply for the MCU, the display screen, the input device and the electric lock. The
network communication between the
server and the dynamic graphical password lock is not needed in the whole unlocking and locking process,
power consumption is reduced, and the hardware cost is reduced; in addition, by generation of the graphic code by the MCU, the security performance of the sharing
system is further improved.