Tamper-resistant packaging and approach using magnetically-set data

Capable of preventing groove is method for protecting chip (100) by hand and a access according does not expect. The implements a according to a demonstration of the present invention, the encrypted is a magnetic response circuit element (130-135) state function, and for is deciphered the state (130-135) function. The (106) is arranged to prevent to access to the chip; and a magnetic particle (120-125). The magnetic particle (120-125) is arranged to the magnetic response circuit element (130-135) and a state for enciphered data. The invention state element is used for deciphering the rechargeable battery (e.g., a key). The magnetic particle change, for example by the rest part of sealed, wherein the one or more state of magnetic response circuit unit connected to the invention, a to the state device is used for coding the data.