| 摘要 |
1. Installation for controlling and monitoring the different coded locks of an assembly, comprising : an emitter capable of elaborating coded keys for controlling said locks and a reader associated with each lock, for unlocking this lock on simple presentation thereto of a correctly coded key, this emitter and this reader being adapted so that detection by said reader of the code y recorded by said emitter on each new key of order p assigned to the lock associated with this reader results in the invalidation of the code x recorded on the key of order p - 1 previously assigned to this lock, each code y being derived from code x by an algorithm y = f(x) stored in at least the emitter, characterized in that at any time the reader is responsive simultaneously to a number m greater than 2 of non invalidated codes of the succession x, f(x), f**2 (x)..., f**n (x), where f**n (x) = f[f**n-1 (x)], and is adapted so that by reading any one of these codes, it automatically invalidates all the lower rank codes of the succession considered. |
