FR2466056A1 - Electronic security lock system - uses key card carrying contact connections which is compared with reference card to check validity - Google Patents

Abstract

The electronic lock system uses both keys and 'counter-keys' in order to check the authority of a user to gain access to a locked area or room. Each key or counter key has a number of electrically conductive contacts, half of which (1-7) are input contacts and half of which (8-14) are output contacts. A number of connections are made between selected input and output contacts, the arrangement of connections determining the combination of the key. In the lock the key card bearing the connection is compared with a counter key. If the connections are the same then the key is accepted and the lock opened. The counter card may fairly easily be changed - for example if a key card has been stolen, changing the lock combination. The several connection also permit multiple levels of access by users.

Description

Electronic security device of the type comprising a control key and a counter-key.

The present invention relates to an electronic security device that uses a control key, a counter-key and a comparison circuit; it can be used for example to control locking systems protects an enclosure (apartment, safe) by only allowing access to people with a suitable code key.

The principles of realization of this electronic security device make it possible to have master keys or by-passes of different levels, locks accepting several different keys or combined systems.

Can also be performed in addition to welcome music systems, signaling the approach of a visitor or automatic call from a call center on the telephone network.

 There are already electrical and electronic locking devices in which a key (or pushbutton switches, etc., serve as a key) is connected to electrical or electronic devices to determine whether the key (or a particular combination of pushbutton) is correct in order to allow access to a controlled area, for example by electrically unlocking a door; these devices use various coding means such as location of holes on a card, magnetic recording, binary code circuits, code word or code for push buttons.

However, although these previously known devices are useful in many applications, whether they use removable keys or equivalent means, they allow only a limited number of combinations, except at very high speeds and at large keys. ; they do not make it possible to achieve pass-all or partial-pass key systems such as they are for example now required for such offices or other collective buildings; finally, except for a few of them, they require an important work to modify the code or the combination, for example in case of theft of the key.

The present invention proposes among other things to provide an electronic security device overcoming these disadvantages. The invention solves the problem of creating an unlocking device control device using lightweight, economical, small-sized, high security keys due to the large number of possible combinations, and allowing pass-partial keys. or mat as well as devices accepting different keys.

For this purpose, this device uses a key, comprising a set of so-called input points, a set of so-called output points, and electrical connections connecting each output point to an entry point; some exit points may not be connected to allow for pass or part pass systems; each point of exit is thus connected to a painting of entry at the most, and the order of the points of exit realizes a partial permutation or arrengement (in the current mathematical meaning of the term) of the points dexter, or a permutation on the related points; this arrangement, that is, the order in which each exit point is connected, or not, to an entry point, constitutes the key code of the key is normally in the possession of the user and is inserted when the the user desires to use it to control the unlocking device, in contact or electrical connection means of the comparison device; a counter-key, made as indicated above for the key; this counter-key is normally either inserted in contact means or electrically equivalent to the comparison device; it is generally easily removable, and replaceable when you want to change the device code; it may also be fixed, or even form part of the following comparison scheme; a device for comparing the key and the counter-key; it comprises means for comparing the arrangements, or the permutations, made by the key and the counter-key and provides a correspondence signal feeding for example electrically-controlled unlocking means when the arrangements (permutations) of the key and of the key-ring corresponds sufficiently, it can provide a signal supplying warning means when the contact means operating improperly; it can also provide a signal supplying an alarm system when the pormutetions of the key and the counter-key do not match sufficiently; in an annexed way, he can
Finally include other devices: the first provides an output signal normally intended to be connected to a speaker, to emit series of sounds corresponding to different events; the second provides an output signal normally intended to be connected to the telephone network, to call in some cases a standby center, and allow him to identify the calling device.

Several devices corresponding for example to different enclosures can also be combined into an installation then comprising stations each intended to receive one or more keys, and / or one or more counter-keys, and / or one or more comparison devices. ; a same comparison device may be common and therefore used for the comparison of more than one key with a counter-key; likewise a counter-key may have a common title, and serve for comparison with several keys; likewise a key can control several output devices.

The other objects and features of the present invention will appear more clearly in the description below, which refers to the accompanying drawings and given by way of example, and in which: FIG. 1 represents, in schematic form, a key or a counter-key.

FIG. 2 represents a particular embodiment of a key or a counter-key.

FIG. 3 is a diagram of a particular embodiment of the invention using logic circuits.

FIG. 4 is a diagram of another particular embodiment using a microprocessor circuit.

FIG. 5 is a diagram of another particular embodiment using a microprocessor circuit and logic circuits.

FIG. 6 is a diagram of another particular embodiment in which the analysis signals of the counter-key are derived from the signals collected on the key.

The electronic security device according to the present invention uses a key and a counter-key, one of which is represented on the block diagram FIG. I, each comprising a set of so-called entry points.
I 2 3 4 5 6 7, a set of so-called output points 8 9 10 10 11 I 3 I4 and connections I6 I7 18 19 allowing each of the output points to be connected to one at most points of entry t all these connections thus allow the exit points to constitute an arrangement (in the mathematical sense of the term) of the entry points that arrangement, that is to say the order in which the exit points are connected, or no, at points of entry, is the code of the key, or counter-key; thus in the example shown in FIG. 1, the code can be indicated by 2 5 6 I 0 7 0 meaning that the prewier pbietda output is read at the second entry point, the second exit point at the entry fifth , the third exit point at the sixth entry point, the fourth exit point at the first entry point, the fifth exit point at no entry point, the sixth exit point at the seventh entry point, the seventh exit point finally at no point of entry.

In a particular embodiment, the key (ow the counter-key) is the mSle part of a multiplots connector, the entry points are some of these pins, the exit points of others of these pins, the connections are electrical wires connect one of the pin-exit point to one of the pin-point of entry; some plots-exit points are not connected, to constitute as above a pass-part or a passe-partout.

In another particular embodiment of the cll, shown in Figure 2, it consists of a wafer of non-conductive material 20; on one surface of this wafer are arranged thin conductive strips 21, 22,..., U, which are substantially parallel, and are connected, some of them, 21, 23,..., 29, of odd rank, to the points of entry (for example, studs). conductors 3I, 32, ... 35 located on the same face), the others of even rank 22,24, ... 30, at the exit points (in the example of conductive pads 36, 37, ... 40 located on the opposite side and connected through the wafer by means of the appropriate connection means 4I, 42, ... 45); on the other surface, other thin conductive bands 46 ....

50 in a direction substantially perpendicular to the strips 21, 22, ... 30; finally connections 5I, 52, ... 59, connect through the wafer each band 46 ... 50 on the one hand to one of the strips 21, 23, 25, ... 29 connected to a stud d in trek, on the other hand possibly to one of the bands 22,24,26 ... 30 connected to an output pad; the exact location of these connections, or their absence, allowing to realize the ar.

storage constituting the key code.

The total number of entry and exit points is a matter of choice, determined by the desired number of possible keys; the number of unrelated exit points is also a question of choice, determined by the level of pass-partial that one wishes to obtain, that is to say for a key by the number of devices that one wishes that the key can open, for a counter-key by the number of keys that can open the device.

If a key has n entry points and n exit points, the number of possible keys is - if all exit points are connected: n! if p points are left isolated, a p-level p -partial is formed; the number of such partial passes is n! xn! p! (np)! p!
Each pass-part will open p! devices equipped with counter-keys with all connected points; it can be seen that, for n = 16, corresponding to keys of reduced size and cost and to current contact means, the number of possible keys with all points connected is already greater than twenty trillion, which is clearly more that most of the security systems of the state of the art are easily achievable. It is also possible not to group all the entry points of the same ceté as had been shown in Figures I and 2, but to interpose input and output points for example on the connector, which multiplies again greatly the number of possible combinations.

The electronic security device, object of the present invention, also comprises a device for comparing the arrangements or permutations of the key and the counter-key; this device is intended to verify that the arrangements made by the key and counter-key (location of unbound exit points and permutations on subsets of exit points connected to entry points) are linked by a predetermined fixed relation, this relationship possibly being an identity or a reciprocity, or the obtaining by the combination of these two permutations (product in the mathematical sense of the term) of a predetermined permutation, or the obtaining by the combination of one of the permutations and the inverse of the other of a predetermined permutation, a combination of these different methods. This device comprises a) contact means, electrical connection or fet identical, with the entry and exit points of the key and the counter-key, b) means for generating variable analysis signals in the time and means for sending all or part of said signals to the entry points of the key and the counter-key. These signals are, for example, the sending of a potential VI to certain points, of a potential V2 to others, the points on which VI (respectively V2) is sent, varying over time, c) desbmoyXens to collect the permuted signals appearing on the exit points of the key and the counter-key, d) in particular when the comparison relation between the permutations is not an identity, means to return to the points of entry of the counter-key (or the key) of the signals Signals analysis of the signals collected on the points of exit of the key (respectively of the counter-key), e) means for c counter the signals appearing either on the exit points of the same rank of the key and the counter-key, or in the case (d) above on the exit points of the counter-key (respectively of the key); this comparison is carried out by verifying that, but only for certain ranks envisaged at the construction, on two exit points of the same rank of the key and the counter-key, at least one is not connected to a point d 'Entrance; this is for example verified by recognizing that the signal appearing on this point is fixed and independent of the input signal; either, on two output points of the same rank of the key and the counter-key, appear identical signals to each other, whatever the analysis signals sent.

 in case (d) above, only on the points of.

out of the counter-key (respectively of the key), appear signals, identical to the analysis signals in the case where the relationship between the permutations of the key and the counter-key is a reciprocity, or liFs d ' a way provided in advance to the analysis signals, in the case where the relationship between permutations of the key and the counter-key is that their combination or the combination of one with the inverse of the other gives a fixed permutation ;; either, in the case where the relation between key and counter-key is a sharing of identity, reciprocity, product giving a fixed combination and product of one by invar se of the other giving a combination fixed, by checking a combination of the above criteria corresponding to this share; f) means for generating an output signal which may, for example, supply electrical unlocking means when the verification is satisfactory. Possibly means for generating a warning signal when the means (a) do not allow good contact, and means for generating an alarm signal when the verification is not satisfactory.

In a particular embodiment, represented in FIG. 3, the analysis signals consist of sending to all the entry points, except one, of a potential close to the supply voltage, denoted I, and to this other. point of a potential close to the mass denoted 0; At regular intervals, the point at which an O is sent is changed, so that all entry points successively receive this potential.

The device generating these signals is for example constituted by an oscillator circuit 61 controlling a counter circuit 62, taken a demultiplexer circuit 63. It is well known that the counter circuit delivers on its outputs 95, 96 and 238 signals reproducing in the code binary successive digits, while the demultiplexer circuit outputs on its outputs 91 to 94 potential signals close to the supply potential except on its outputs whose number is indicated by the binary code present on its inputs.

The combination of these circuits therefore produces the sought-after effect, and the wires 91 to 94 are sent to the end points 98 to 101 of the key 239 and to those 106 to 109 of the counter-key 240.

The device for checking the correspondence of ars.

storage (permutations) includes exclusive OR gates with 2 inputs and one output; one of the inputs is connected, for certain doors through an inbibitor circuit, by means of contact or connection with an exit point of the key; the other entrance is connected, for some doors through a
inhibiting circuit, at an exit point of the counter-key;
more precisely, it includes wires 64 to 67 connected to
exit points 102 to 1Q5 of key 239, leads 68 to
TI connected to the exit points 110 to 113 of the counter-key 240; on some of these wires 66, 67, 70, 71 are placed
inhibiting circuits comprising on the one hand flip-flops 72 8 75 also connected to an initiating circuit 80, on the other hand OR circuits 76 to 70 with 3 n-trips controlled by the flip-flops 12 to 75t the outputs of these circuits are indicated by n 87 to 90; the wires 64, 65, 87, 88, 68, 69, 89, 90 are connected in pairs to exclusive OR circuits with 2 inputs 81 to 84 * of the outputs
are connected by the wires 114 to 117 to the same part OR, or
OR-NO (OR) 85 having as many entries as exit points on the key; the output of this OR circuit controls an input of a flip-flop 86 whose other input is an output 288 of the counter 62; finally the outputs of this circuit flip 86 provide one 119 the signal of sor
able to command an alarm, the other 118 the correspondence output signal can trigger the system
electric unlocking.

The operation of this device is as follows the insertion of the key in the contact means 284 to 291, triggers, by an auxiliary contact 241 controlling the circuit 80, the circuit under voltage of the circuits, the revive to
xero of the counter 62, the setting in position 1 of the rockers
72 to 75, then the start of the oscillator 61; com
pit 62 has a first time from 0 to n-1 (n, here 4
being the number of exit points of the key), which
shows a potential 0 successively on each
wires 91 to 94 * the others keeping the potential 1; these
potential are found, in the order corresponding to
the permutation of the key, on the wires 64 to 70; On the other hand
the wire 71 still has a fixed potential close to the po
power supply thanks to the internal realization of the circuits 75 and 79) since the output pad II3 of the key 240 is connected to R no input pad.

At the moment when this potential 0 is reached on the input of each of the flip-flops 72 to 74, the corresponding output goes to zero, and will remain thereafter; the exit of the doors
OR 76 and 78 will then reproduce entry 68 and 69; while the flip-flop 75 never receives 0, its output will remain at one, and the outputs of the gates 77 and 79 will therefore remain at one in all the sequence.

When the counter 62 passes to the value n (here 4), appears a potential I on the wire 238 which releases the flip-flop 86 previously maintained at 0 by the potential O of the same wire 238.

The counter then counts from n to 2 n-1 (in this case from 4 to 7), at which point it stops the oscillator thanks to the wire 97; it therefore appears again on each of the son 91 to 94 successively potentials 0, while the other son are at the potential I; these potentials are transmitted by the internal connections to the key 239 and the counter-key 240, to the wires 64 to 71, and therefore to the inputs of the exclusive OR gates 81 to 84.

The table below gives, in chronological order, the potentials appearing successively on these different wires in this second phase of counting:

<tb> 95 <SEP> 96 <SEP> 91 <SEP> 92 <SEP> 93 <SEP> 94 <SEP> 64 <SEP> 65 <SEP> 66 <SEP> 67 <SEP> 68 <SEP> 69 <SEP > 70 <SEP> 71 <SEP> 87 <SEP> 88 <SEP> 89 <SEP> 90
<tb> 0 <SEP> 0 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 1 <SEP > 0 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 0 <SEP> 1
<tb> 0 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP > 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1
<tb><SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1
<tb><SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 0 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1 <SEP> 1
<Tb>
It is thus seen in this case that each exclusive-OR circuit 131 to 84, receiving always identical signals on its two inputs, will always give an O signal at the output, so that the OR circuit 85 will output a signal I which will not change the signal. state of the flip-flop 86; it will thus provide on its output II8 a signal I allowing the opening of the unlocking device, while the output 119 will remain at O, not triggering an alarm.

In the case where the permutations of the key and the counter-key are not identical, it appears that for at least one of the values of the counter, the potentials appearing at the inputs of the exclusive OR circuits 81 to 84 will not be identical. ; one of the circuits will therefore give an I value at the output, which will trigger a signal 0 at the output of the circuit 85 and therefore a change of state of the flip-flop 36; for a sufficient frequency of the oscillator 61, this change of state will occur after a short time, while the unlocking device will not yet be naked; triggering the appearance of a signal O on the output IIS, it will permanently prohibit the unlocking while the appearance of a signal I on the output 119 will trigger the alarm.

 5ans a second particular embodiment, shown in Figure 4, the analysis signals are formed identically to the previous mode; the device for generating these signals is a microprocessor circuit I52, accompanied if necessary by its auxiliary circuits such as clock, memory (s), interface (s) input / output, controlled by a program so as to perform similar operations to those described above, and optionally to compare, between them or with some of the analysis signals, the permuted signals. The analysis signals are sent by the son I20 to I25 to the input pads 126 to I3I of the key, and the input pads 132 to I37 of the counter-key; the permuted signals are collected by the son 1313 to I43 for the key 285, 144 to I49 for the counter-key 296. The alarm signal is provided at I50, that allowing the unlocking I5I.

In a third particular embodiment represented in FIG. 5, the analysis signals are constituted as in the previous modes; the device for generating these analysis signals and the device for comparing the permuted signals comprise a microprocessor circuit
I53, controlled by a program contained in the memory
I54, a clock circuit I55, an output interface circuit 156, and a demultiplexer circuit 157.A first part of the program contained in the memory I54 controls the microprocessor I53 to send to the outputs
I58 to I60 of the interface circuit I56 the successive numbers
0 to 11, which causes, as indicated above, the appearance of the desired potentials on the outputs I6I to I68 of the demultiplexer; these outputs are sent by contact means on the input pads 169 to I76 of the key 237 and 185 to I92 of the counter-key 236.The comparison circuit comprises two multiplexer circuits 2I7 and 2I8, the inputs of which are firstly the wires 225 to 227 coming from an output interface 228, on the other hand the wires 20I to 2I6 connected by contact means to the output pads I77 to I84 of the key, I93 to 200 of the counter-key . The outputs 2I9 and 220 of the multiplexers 2I7 and 2I8 are connected, possibly by an input interface circuit 22I, to the microprocessor 153.

The second part of the program contained in the memory
154 makes it possible to send the successive numbers 0 to nI in binary code on the wires 225 to 227, and it is well known that, due to the operation of the multiplexer circuits 2I7 and 2I8, the outputs 2I9 on the one hand and 220 on the other hand on the other hand then successively reproduce the entries 201 to 208 on the one hand, 209 to 216 on the other hand.

The combination of these two devices and a third part of the program contained in the memory I54 make it possible to compare the permutations of the key and the counter-key, or the identification of the isolated output pads, and thus to trigger the 222 release or 223 alarm, possibly through the interface circuit 224.

One or more of the interface circuits 156, 221, 224, 228, clock I55, microprocessor 153, program memory I54 can be combined into one and the same circuit in other particular embodiments.

According to a variant of the invention, a complementary device allows a new part of the program contained in the memory I54 to control the microprocessor I53 to display on a wire 229, possibly through an interface 230, a composite output signal. variable oscillations in time which, connected to a loudspeaker, will produce a sequence of sounds. This complementary device is, for example, triggered in case of sufficient correspondence at the same time as the output 222, so as to provide a welcome music; in another example, it is triggered by a signal from an external contact 23I, possibly through an interface 232J coming for example from a doorbell or a presence detector; in a third example, the complementary device is triggered, either at the same time as the output-222, or in case of poor contact, or by the external signal from the contact 23I, and provides variable oscillations depending on the cause of the trigger.

According to another variant of the invention, a complementary device allows a new part of the program contained in the memory I54 to control the microprocessor I53 in fact to appear on a wire 233, possibly through an interface 234, an output signal which for example, during a first time, a signal coded in a predetermined manner, for example corresponding to what would be a station
ordinary telephone to call a center of standby whose number is contained in the memory 154 or in an annex memory 235; for a second time, or on
another thread, a signal related to the permutation of the against
key 236 and obtained by sending the successive values of necessary potentials on the wires 158 to 160 and 225 to 227, and to the interpretation of the potential collected on
the wire 220; entin, on the diagram figure the contact 228
actuated by the insertion of the key 237, which, by
circuit 229, triggers the start of the assembly
key examination device and counter-key.

In another particular embodiment, represented
Figure 6 shows the means of comparison between
permuted signals include OR gates exclusive to
2 inputs and 1 output; one of these inputs is connected,
for some doors through an inhibitory circuit,
by means of contact with an exit point of the key
(or counter-key); the other entrance is connected, for
some doors through another inhibitor circuit,
and / or for some doors through a circuit of
permutation, means generating the analysis signals;
more precisely, the analysis signals are gei
res by the oscillation circuit 242, the counter circuit
243, the demultiplexer circuit 244, according to a method
already described above; they are sent by the sons
245 to 248 to the entry points of key 249; the
permuted signals are collected by wires 251 to
254 and sent as scan signals to the entry points of the lock key 250; the permuted signals
by it are collected by the son 253 to 258,
and sent, for the wires 255 and 256 through dice
inhibitory circuits each consisting of a rocker
259 or 260 and an OR gate with 3 inputs 261 or 262
to one of the entries 263 ... 266 of the doors OR
exclusive 271 to 274; the second inputs 267 to 270 <these exclusive OR gates are connected to the wires 245 to 248 bearing the initial analysis signals, for the inputs 269 and 270 through the inhibiting circuits each comprising an OR gate 275 or 276; the outputs of these exclusive OR gates 271 to 274 are connected to the same OR or OR gate 277, the output of which controls a bistahle flip-flop circuit 278; the outputs of this flip-flop are one 279, the corresponding output sirnal, the other 280, the signal controlling the alarm.

The operation of the device is similar to that described above; it is triggered by the circuit 281 controlled by the contact 282; the inhibitory circuits are activated or not during the counting from 0 to 3, the flip-flop 278 is released by the wire 28: 3 when the counter goes to 4, the counting from 4 to 7 tests the permutations the connected pads.

As indicated above, several devices in accordance with the foregoing may be grouped into a facility comprising several stations; these may use common means of generating analysis signals, and / or comparing the arrangements / permutations of one or more keys with one or more counter-keys; in general, the entire installation is arranged in such a way that the set of comparison devices makes it possible to compare the arrangement and / or the permutation of each key, when it is inserted into the contact means or connecting a station, with the arrangement and / or the permutation of one of the counter keys, located or not in the same station; the installation enables one or more output signals to be triggered when there is a sufficient predetermined match between these arrangements and / or these permutations; these output signals are either transmitted to one or more of the stations, especially when it contains unlocking means, or to one or more ancillary facilities.

Finally, the invention also comprises a mode of realization tion using only a key, according to the descriptions above but without counter-key; the arrangement of the key is then compared by means analogous to those described above, to one or more model arrangements, in order to recognize the existence of a sufficient predefined correspondence with one of them; these model arrangements are for example coded in the program memory commanded the microprocessor, or in an auxiliary memory, or in a device of the same purpose.

Naturally, the invention is in no way limited to the embodiments described and shown, given solely by way of example, and comprises all the technical equivalents of the means described as well as their combinations if they are carried out in the context of the invention. claims that follow.

Claims (11)

claims 1) Electronic security device of the type comprising  a control key and a counter-key, characterized in  what said key and counter-key contain  each of the entry points, exit points and  connections connecting each output point to a  entry point at most, so as to achieve an  and / or on the points connected to a permutation,  the order in which the exit points are connected,  or not, at points of entry, constituting the code of the  key and had that device features means  to compare arrangements and / or permutations  made by the clém lorque it is iliséré in  means of contact or electrical connection, and  by the counter-key, which is fixed or removable; so  where there exists, sufficiently, a correspon  predetermined dance between the said arrangements or  said permutations or part of them, said  device provides a correspon-  dance. 2) Device according to claim 1, characterized by  the fact that it includes deans of  analysis signals that vary over time, means  contact or aforementioned connections with the points  input of the key allowed to send some of  analysis signals on these pads; the means of contact  aforementioned connection with the exit points of  the key, to collect the permuted signals;  means to send some of the analysis signals  on the counter-key and collect the permu signals  your; means for comparing these permuted signals  between them or with some of the analysis signals. 3) Device according to claim 2, characterized by  the fact that the above-mentioned analysis signals, sent on  the entry points of the key (respectively the  counter-key) are derived from the signals collected on  the points are the exit and the counter-key (respectively  of the key). 4) Device according to claim 2, characterized by  the fact that the aforementioned means of generating signals  of analysis include an oscillator circuit and a  counter circuit. 5) Device according to one of the preceding claims,  characterized by the fact that the comparison means  above, between the permuted signals include  OR exclusive doors with 2 inputs and 1 output; that one of  entrances to each door is connected, for some  through an inhibitory circuit, by means of  contact with an exit point of the key; that the other  elltréee is connected, day some doors through  of another inhibiting circuit, by the aforementioned means  at an exit point of the key lock; that the outputs  said exclusive OR gates are connected to the inputs  the same OR gate, or OR / NO, the exit is  connected to a rocker. 6) Device according to claims 1 to 4, characterized  rised by the fact that the means of comparison pre  cited between the permuted signals include  Exclusive OR gates with 2 inputs and 1 output; that one  entrances tle each door is connected by means  mentioned above at each exit point of the key (or  counter-key), for certain doors through a  inhibitory circuit; that the other entry is re-read to  means generating the analysis signals, for some  doors through an inhibiting circuit and / or itour  some doors through a permutation circuit. 7) Device according to claim 2, characterized by  it is that said means for generating the signals  analysis and / or said means for comparing the signals  permuted, to each other or to some of the signals  analysis, including a microprocessor circuit  ordered by program.  8) Device according to claim 7, characterized  in that said microprocessor circuit  ordered by program, can also provide a  output signal composed of oscillations, intended  for example to produce in a speaker a  series of sounds, said oscillations varying in  time and / or depending on the correspondence  between key and counter-key, and / or an external signal.  9) D '8positive according to claim 7, characterized by  the fact that said microprocessor circuit controlled  programmatically, can also provide a signal of  encoded output in a predetermined manner, and, siwult  whether or not an output signal related to the permu-  the counter-key. 10) Electronic security installation, type  controlled by key, characterized by the fact that  includes stations, each intended to receive  one or more keys, and / or one or more  counter-keys, and / or one or more  comparison; that means connect stations  between them; that each key or counter-key includes  entry points, exit points, and  connections connecting each exit point to a point  entrance, in order to make an arrangement  and / or on the connected points a permutation, the order  in which the exit points are connected, or not,  at the entry points that make up the key code; ;  that the set of comparison devices allows  to compare the arrangement and / or the permutation of  each key to the arrangement and / or the permutation  of one of the counter-keys, and to declatch one or more  if there are horns when there is a horn  sufficient predetermined spondance between said  arrangements and / or those permutations, these  output signals being retransmitted to one or more  stations, or ancillary facilities.  1l) Electronic security installation of the type  controlled by key, characterized by the fact that  said key has entry points, es  exit points, and connecting connections  each exit point to an entry point at  more, so that the output points cons  establish an arrangement of entry points, this  arrangement, that is, I order in which the  exit points are connected, or not to the points  the key code, and in that  that it includes means of comparing this  arrangement with one or more arrangements  models, to recognize the existence of a corres  sufficient predetermined weight with 1 of them. 12) Installation according to one of the preceding claims  characterized by the fact that it comprises  in addition an alarm device to indicate that  said predetermined correspondence between  arrangements / permutations is not obtained.