US Patent 9977891 Anonymous authentification method and authentification system using the same

An anonymous authentication method is implemented by an authentication device that has a key array. The key array has multiple array dimensions each having multiple device keys. The method includes: receiving ciphertexts from a chip that has multiple chip keys; acquiring authentication keys by: for each of the ciphertexts, performing trails of decryption using the device keys of one of the array dimensions that corresponds to one of the chip keys used to generate the ciphertext one by one until obtaining one of the device keys that successfully decrypts the ciphertext to serve as one of the authentication keys; and obtaining, for authentication, information associated with the chip according to the authentication keys.