Working method for multi-seed one-time password

A working method of multi-seeded dynamic token, wherein said method comprises the steps of:

• Step S1, powering on and initializing a dynamic token, turning on a general interrupt, setting a system state as a first preset state, making the dynamic token enter into a sleep mode, and the dynamic token waiting for being waken;
• Step S2, waking up the dynamic token when an interrupt is detected, making the dynamic token enter into an interrupt process flow, and executing Step S3 after the interrupt process flow is finished;
• in which the interrupt process flow includes:
• determining, by the dynamic token, whether a key-interrupt flag is set, if yes, setting a button-waken flag and resetting the key-interrupt flag, and ending the interrupt process flow;
• otherwise, ending the interrupt process flow;
• a key interrupt is triggered when a key on the dynamic token is pressed, and the key-interrupt flag is set;
• Step S3, checking, by the dynamic token, the button-waken flag, entering into the key process flow in case that the button-waken flag is set, reentering into the sleep mode when the key process flow is finished, waiting for being waken, and returning to Step S2;
• in which the key process flow comprises:
• Step a, obtaining, by the dynamic token, a key value, determining the key value and the system state, executing Step b in case that the key value is a first preset key value and the system state is a first preset state;
• executing Step c in case that the key value is a second preset key value and the system state is a second preset state;
• executing Step d in case that the key value is the second preset key value and the system state is a third preset state;
• executing Step e in case that the key value is the second preset key value and the system state is a fifth preset state;
• executing Step fin case that the key value is a third preset key value and the system state is the second preset state;
• executing Step g in case that the key value is the third preset key value and the system state is the third preset state;
• otherwise, executing Step h;
• Step b, displaying, by the dynamic token, a function menu, initializing a function menu index, setting the system state as the second preset state, and executing Step h;
• Step c, determining, by the dynamic token, an operation chosen by a user according to the function menu index, displaying a seed data menu, initializing a seed menu index, setting the system state as the third preset state and executing Step h in case that the operation chosen by the user is generating an OTP;
• obtaining and displaying a pre-stored serial number of the dynamic token, setting the system state as the fifth preset state and executing Step h in case that the operation chosen by the user is programming seed data;
• Step d, reading, by the dynamic token, seed data, which is stored in the dynamic token and is arranged to correspond to the seed menu index, generating and displaying an OTP according to the read seed data, setting the system state as a sixth preset state, and executing Step h;
• Step e, collecting, by the dynamic token, light sensor data, determining whether a serial number in the collected light sensor data matches the pre-stored serial number of the dynamic token, if yes, storing seed data which is in the collected light sensor data, and generating and displaying an OTP according to the latest stored seed data, setting the system state as the sixth preset state, and executing Step h;
• otherwise, clearing the collected light sensor data, obtaining and displaying the pre-stored serial number of the dynamic token, setting the system state as the fifth preset state, and executing Step h;
• Step f, updating, by the dynamic token, the function menu index, and executing Step h;
• Step g, updating, by the dynamic token, the seed menu index, and executing Step h;
• and
• Step h, resetting, by the dynamic token, the button-waken flag, and ending the key process flow;
• wherein in case that the key-interrupt flag is not set in the interrupt process flow, the flow further comprises:
• determining whether a RTC-interrupt flag is set, if yes, setting a RTC-waken flag, resetting the RTC-interrupt flag, and ending the interrupt process flow;
• otherwise, ending the interrupt process flow;
• in which, when the RTC interrupt is triggered, the RTC-interrupt flag is set;
• Step S3 is replaced as:
• determining, by the dynamic token, whether any set waken flag exists, if yes, checking the RTC-waken flag and the button-waken flag successively, entering into the key process flow in case that the button-waken flag is set, and executing Step S3 when the key process flow is finished;
• entering into the RTC process flow in case that the RTC-waken flag is set, and executing Step S3 when the RTC process flow is finished;
• if no, making the dynamic token enter into the sleep mode and waiting for being waken, and executing Step S2;
• in which the RTC process flow comprises:
• Step X1, decreasing, by the dynamic token, the number of RTC interrupt times progressively, determining whether the number of RTC interrupt times is a preset number of times, if yes, resetting the RTC-waken flag, and executing Step X2;
• otherwise, executing Step X2;
• Step X2, increasing, by the dynamic token, a first parameter and a second parameter progressively, determining respectively whether the first parameter reaches a threshold of the first parameter and the second parameter reaches a threshold of the second parameter;
• setting the first parameter as its initial value and updating a first time factor stored in the dynamic token in case that the first parameter reaches its threshold;
• setting the second parameter as its initial value, updating a second time factor stored in the dynamic token and executing Step X3 in case that the second parameter reaches its threshold;
• executing Step X3 directly in case that neither the first parameter nor the second parameter reaches a corresponding threshold;
• Step X3, updating, by the dynamic token, a calibration count value, and determining whether the first parameter equals a preset value, if yes, executing Step X4;
• otherwise, ending the RTC process flow;
• and
• Step X4, determining, by the dynamic token, whether the first parameter and the second parameter need to be calibrated according to the calibration count value and a calibration value pre-stored in the dynamic token, if yes, updating the first parameter, the second parameter and the calibration count value according to the calibration value and the calibration count value, ending the RTC process flow;
• otherwise, ending the RTC process flow;
• wherein determining, by the dynamic token, whether the first parameter and the second parameter need to be calibrated according to the calibration count value and the calibration value pre-stored in the dynamic token specifically comprises:
• determining, by the dynamic token, whether a result obtained by performing an AND operation on the calibration value and 0x7F is less than the calibration count value, if yes, the first parameter and the second parameter need to be calibrated;
• otherwise, the first parameter and the second parameter do not need to be calibrated;
• wherein updating the first parameter, the second parameter and the calibration count value according to the calibration value and the calibration count value specifically comprises:
• updating the calibration count value as a value obtained by subtracting the calibration value from a current value of the calibration count value, checking the most significant digit of the calibration value, updating the first parameter by subtracting 1 from a current value of the first parameter and updating the second parameter by subtracting 1 from a current value of the second parameter in case that the most significant digit of the calibration value is 1;
• updating the first parameter by adding 1 to the current value of the first parameter and updating the second parameter by adding 1 to the current value of the second parameter in case that the most significant digit of the second parameter is 0.