The present invention relates to a method for authenticating a timepiece comprising measuring acoustic vibrations emitted by said timepiece to obtain an electrical signal, said electrical signal indicating a variation of a magnitude of said measured acoustic vibrations as a function of time, wherein said electrical signal comprises a plurality of acoustic events associated with mechanical shocks taking place in said timepiece, extracting in said electrical signal or in a representation of said electrical signal in a time, frequency or time-frequency domain at least one of a magnitude information on a magnitude of one of said plurality of acoustic events, a time information on said one of said plurality of acoustic events and a frequency information on a frequency of said one of said plurality of acoustic events, comparing said extracted at least one of a magnitude information, time information and frequency information with at least one of a reference magnitude information, reference time information and reference frequency information, and deriving an information on an authenticity of said timepiece based on the comparison result.