Aiming at disadvantages of the existing ID authentication methods on smart mobile-phone

ID authentication method based on physiological tremor is proposed. To achieve the authentication

the physiological tremor of the upper limb is used as biological feature

when a user holds a mobile device with a specific static posture

tremor data is recorded from the embedded accelerometer of the device

after signal preprocessing

power spectral density（ PSD） is obtained and act as ID template

then similarity between the test signal and the template is calculated by dynamic time warping algorithm（ DTW）

and the authentication result is obtained from the similarities. Experimental results show that both the equal error rate（ EER） and the half total error rate（ HTER） are below 8 %

which means a good performance of the algorithm.