Electronic anti-fake label and realizing method

The invention relates to an electronic anti-fake label and a realizing method. The anti-fake label embedded into a commodity mainly comprises a hardware encryption and decryption module of a passive band chip operating system (COS), a coil and a destruction activation device, wherein the hardware encryption and decryption module of the passive band COS comprises a central processing unit (CPU) encryption chip and a memorizer, anti-fake activity is performed through an asymmetrical secret key encryption algorithm, and data read-write is performed through a non-contact mode; and the coil and the destruction activation device are connected with the CPU encryption chip, through excitation of the destruction activation device, the CPU encryption chip detects a disconnection state or changes and performs processing as follows to identify that the anti-fake label is opened: the access function of the CPU encryption chip is turned off, or internal data of the anti-fake label is cleared, or the CPU encryption chip is directly added with information that the commodity is already used.