| 摘要 |
A security system prevents alteration of a code in an apparatus which has a controller (200) comprising a store (203) connected to a first electronic device (204) to provide it with the code. The first electronic device (204) has a first permanent store (207) for permanently recording the code. The first electronic device (204) is arranged so as not to operate if a different code is subsequently provided from the code permanently stored by the first electronic device (204). |
