JPS6243749A - Security key - Google Patents

Abstract

PURPOSE:To secure connection by bringing a contact terminal into contact with a contact pin provided to a receptacle, using a memory as part of the memory of a target memory, and providing a ring-shaped conductor to the contact terminal. CONSTITUTION:When a key 10 is inserted into the receptacle 50 and rotated as specified, a switch 53 at the bottom part of the receptacle 50 is turned ON to start the processor 101 of the target system 100 or initiate an interruption. At the same time, the claw of a plate falls in a cam groove and pogo pin groups 54... and 55... of the receptacle 50 are lowered to contact contact terminal groups 17... and 18... of the key 10. Then, a processor 101 sends a signal for accessing the memory 40 of the key 10 to the side of the key 10 through a bus 104, either of the pogo pin groups 54... and 55... of the receptacle, and either of the contact terminal groups 17... and 18... of the key.

Description

DETAILED DESCRIPTION OF THE INVENTION [Uses of the Invention] The present invention relates to a security key, and in particular is used to restrict access to sensitive information stored in the memory of a computer system, external storage device, etc. death,
This invention relates to a security key used in a safety/system for controlling electrical equipment.

[Prior Art] Various safety devices have been proposed to limit and control access to sensitive information stored in electronic devices.

As an example of the prior art, a key opening,
There is a location, but the information necessary to release the barrier is located in the newt, for example, in the device.
It is stored in a destroyed PROM, etc., and by matching this with the input code ``71,:'', the password will be removed and you will be able to access the remaining information. be.

In addition, in other stenos with a position on +, when +I is recognized by the target/steno, access command 4:, tatami, is generated.

In addition, when a memory card or the like that supports the processor is inserted into the target/stem, the target/stem operates and allows access to specific information, allowing the target/stem to access memory. One may mention a system in which the removal of a card puts the target/steel into the J1 operating state.

[Problems to be solved] In such a conventional /S=A, the security of the information stored in the target system's memory cannot be guaranteed within 1 minute. In order to solve this problem, we have proposed a security key consisting of a key or card that has a built-in memory that stores program information and a lot of food information, and has already filed an application.

This security key has a built-in memory that forms part of the memory of the target/stem, and the security key can be inserted by storing a program etc. in the memory of the security key. The target/stem will not work unless the As a result, we guarantee the security of confidential information,
Prohibit unwarranted access to confidential information and
The security of the information stored in the target/stem memory or external storage device δ is ensured by ensuring that the contents of the system's memory are removed except during periods of temporary use. Further guarantee.

However, in such a system, even if the key or card is rotated several times or inserted and removed tens of thousands of times, the connection between the key or card side and the target/steel side only takes 1 minute. It is guaranteed that it will be practical and cheap.

Therefore, several inch rotators can be inserted and removed tens of thousands of times.
A connection method that more reliably connects the key or card side and the target/stem side stop is requested.

[Object of the Invention] The present invention solves the problems of the prior art as described above and responds to the demands of the prior 11" technology, and is intended to solve the problems of the prior art as described above and to meet the needs of the target/stem in repeated use as a normal key or card. The purpose is to provide a security key that can guarantee the connection for one minute.

Note that the security keys used in this specification are not limited to those with a uniform key appearance, but include ordinary keys, keys with a bar-like appearance, and keys with an external appearance. It is used to include card-like items 9.

[L Stage for Solving the Problems] Therefore, the first stage of the security key of the present invention for solving the problems described in ll'l is connected directly or indirectly to a memory and a terminal of this memory. In a security key consisting of a key or a card having a contact terminal, the key or card is inserted into a receptacle provided in the target system, and the contact terminal is brought into contact with a contact bottle provided in the receptacle. , the memory is a part of the target/stem memory, and the contact terminal is provided with a ring-shaped conductor.

[Function] By providing the ring-shaped conductor in the contact terminal in this way, the contact pin on the receptacle side of the target/stem is guided inside the ring, so that the connection between them is ensured. Moreover, the contact terminal is a conductive ring,
Because this edge has a buffering effect, even if it is inserted and removed several thousand times or several times, as a result of contact being made several times or several times, one contact point on the receptacle side, etc. If there is wear or misalignment on the contact terminal side of the key.
Even if the ring is in contact with the surrounding area, the ring will be corrected (11:), the contact state will be secured, and it will also be destroyed by 1 and the prevention of the peeling of the contact surface.

Therefore, the connection of the several T rotor is reliable even after tens of thousands of insertions and removals.

[Embodiment Code] An embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram of the safety system showing the key and receptacle, FIG. 2 is a perspective view of the key separated from the receptacle, and FIGS. 3(a) and 3(b) are the contact terminals on the key side and the receptacle, respectively. Pogo pin (contact pin), l!
FIG. 4 is an enlarged sectional view of the head portion thereof, and FIG. 5 is an explanatory view of the substrate constituting each ceramic layer before the key is laminated.

1 and 2, key 10, receptacle 50, and target system 100 are generally shown.

The feature of this embodiment is that the key 10 is electrically programmable, electrically changeable +1 function, electrically readable (-11f'1-)'+'+I function, and nonvolatile, anytime-access digital memory 40 (E2 F
ROM).

Memory 40 then becomes at least a portion of the memory of target system 100 when inserted into receptacle 50 . Also, when the key 10 is removed from the receptor 50, the target system 10
0 will definitely fail as a significant or large portion of the memory will be effectively dislodged.

Here, the receptacle 50 includes a socket 51, a cylinder 52, a limit switch 53, and two rows of pogo pin groups 54, 54.
..., 55.55. -..., and these pogo pins have conductive contact ends f' provided on the key 10.
17. Two rows of contact terminal groups consisting of 17.17.
・Established corresponding to East 18, 18,...

In FIG. 2, the key 10 is made of a ceramic resin substrate having a head portion 12 and a safety portion 13 in the general shape of a key. Contact end J'7ff1 of key 10
7,17. --- and 18, 18°e... are circular contact terminals, which are arranged at predetermined intervals on the same side as the one in which the memory 40 is built-in. .

The contact ends f'17 and 18 are shown in FIGS. 3(a) and (), respectively.
A circular gold contact surface 17a as seen in b).

Metal wires 15 and 16 are fixedly formed on the periphery of the metal wire 18a so as to surround the periphery thereof.

As shown in FIG.
0 and contact terminal J! H7, 17,... and 18.18.
..., and the terminal of the memory 40 provided in the recess 20 and the contact terminal RN7 are connected by this wire 14.
．． 17. ...and 18,18. ... are connected respectively.

Further, as shown in FIG. 4, the chip of the memory 40 or the substrate to which this chip is bonded is placed on the electrostatic protection layer 42 of the energy diode. "Ceramics substrate"
A metal plate layer 30 (corresponding to the metal plate layer 43a on the back side, see FIG. 4) is embedded on the ceramic layer on the outside, and the appearance of a normal metal key is compared to the key 10. giving. Here, the metal plate layer 30 (metal plate layer 43a
) additionally keeps static electricity to a minimum. The details will be explained later in FIGS. 4 and 5.

Here, the key 10 can in fact be used as an easily removable, controllable and portable data storage medium, and can be used as a normal FROM or ROM device, yet has the same functions as a normal key. It's something that works.

Now, as shown in FIG. 3(a), the plate 56 is moved to the 1- and i +
This plate 56 has pogo pins arranged in two rows. T54.54°・Fist-,55,
55, . . . are contact terminal groups 17° 17, . . . and 18
,18. It has been planted in response to...

When the key 10 is inserted and comes to a predetermined setting position, the plate 56 is lowered relative to the key 10 and the pogo pin groups 54, 54 . ..., 55.55, ... are the contact terminal groups 17, 17. ...and 18.18.・
...is brought into contact with each of them.

Note that the plate 56 is normally urged in the lowering direction by springs 57, 57, and is lowered when a pawl provided on the plate 56 falls into a cam groove (not shown).

Now, pogo pin group 54. 54. -..., 55°55,
... and contact terminal group 17.17. -...and ts, ts
, . . O, as shown in Figure 3(b), the contact relationship between the metal wire and the wire is as shown in Fig. 3(b).
5.A circular gold contact surface 17a is attached to the inner peripheral surface of 16.
, 18a. Therefore, pogo pin 1! T54,54. ..., 55, 55. Even if the contact surfaces 17a and 18a are dented, they will be guided by the ring-shaped inner periphery and the contact between them will be ensured. Furthermore, the periphery of the ring has a dynamic buffering effect upon contact.

In this case, the diameter of the tip of the pogo pin 54°55, which is the contact pin, is the same as that of the metal washer 15. The diameter is smaller than the inner diameter of lE3. Here, contact pins (pogo pin group 54.
54. ..., 55. 55°...) is
Usually, the diameter on the tip side is small, and if it is a donut or horn-shaped hole with a hole on the inside, it will usually be larger than this tip diameter.

Therefore, the pogo pin 54.55 and the contact terminal group 17.1
Even if the position of the pogo pin is shifted relative to the pogo pin 8, the tip side of the pogo pin is guided by the ring-shaped inner periphery and enters a more reliable contact state.

Furthermore, since the ring-shaped edge often touches the edge, it has a buffer effect when the tip of the pogo pin contacts the contact terminal, and the ring-shaped edge has a buffer effect when the tip of the pogo pin comes into contact with the contact terminal.
It also plays the role of relieving the pressure on 18a) and preventing it from peeling off. Moreover, even when the edge of the Wabunya 15 (1B) is in contact, contact with the pogo pin (contact pin) side can be established, and contact that can withstand thousands or tens of thousands of times can be ensured.

In addition, since the contact pin is placed inside the ring, it becomes impossible for the user to inadvertently pull out the key while it is in contact with the key, and the key is safely maintained in contact with the target stem. can.

By the way, in this case, in order to avoid stiffness etc.
By reversing the positional relationship between O and the plate 56, the pogo pin groups 54, 54.・Fist・、55、55゜・・・－）°
contact terminals JtH7, 17, . . . and 18, 18 . ...
It may be made to contact with.

By moving from the bottom to the top and making contact, the contact terminals JtH7, 17, ... fist and 18, 18
．． Dropping off dust, dirt, etc. that adheres to...
This makes it possible to ensure contact in a more stable state.

Next, the structure of the key 10 for this electrostatic breakdown prevention IF will be explained with reference to FIGS. 2 and 4.

As seen in FIG. 2 above, the key 10 has its head portion 1
A memory 40 is inserted into the recess 20 of No. 2, and a chip 41 of the memory 40 is placed on a Zener diode substrate layer 421- as shown in FIG. Chip 41. ! : The Zener diode substrate layer 42 and the gold plated layer 42a are mutually fused, and a gold plated layer 42b is similarly provided as a ground on the side opposite to the fused surface of the Zener diode substrate layer 42. I was being treated,
It is connected to the ground wiring provided in the first ceramic layer 43.

The Zener diode substrate layer 42 has bonding terminals 21, 21 . . . φ is the bonding pad of the chip 41, 41 a+ 41 a, ・fist- (these are provided so as to correspond to each other, and the wiring for each bonding panode 41a of the chip 41 is connected from the bonding panod part to this bonding end J. “21, 21.
... to wires 22, 22. Due to...-Case 1-
It is dropped and wire bonded, and this bonding end J
'-21 to external terminals 23, 23. ...to wires 24, 24.
- The external lead terminals 23 and the chip 41 are wire-bonded again by fisting.

By the way, the external terminals 23, 23 . ... are formed at the end of the third ceramic layer 45, and the first ceramic layer 43 has a relatively thick metal plate layer 4 on its back side.
3a is buried, and the signal wiring 43b is on the top surface side.
are connected to corresponding predetermined external terminals 23, 23 . of the third ceramic layer 45 via through holes.
...is connected to... Although the metal plate layer 43a is described as being separate from the metal plate layer 30 for convenience of explanation, the metal plate layer 43a is continuous with the metal plate layer 30, and is different from the metal plate layer 30. 30, these are integrally plated with metal on the surface.

--On the other hand, address signal wiring 45a is formed on the 1] surface of the third ceramic layer 45, and these are similarly connected to the corresponding predetermined external ends -f'23, 23°, fist, and the like. ing.

and a second ceramic layer between the first and third ceramic layers.
The top surface of the ceramic layer 44 is grounded except for the through hole R to eliminate the influence of noise.
is provided. Further, a similar ground 46a is provided on the upper surface of the fourth ceramic layer 46.
A power line 47a runs through the fifth ceramic layer 47.

A relatively thick metal plate layer 30 serving as a ground layer is embedded in the sixth ceramic layer 48 which is the uppermost layer.

FIG. 5 shows the state of each layer before they are laminated, and shows the state of each layer from the first ceramic layer 43 to the sixth ceramic layer 43.
The ceramic layers 48 are formed by sequentially laminating ceramic substrates 43S to 48S, and these may be fired individually and then laminated, or they may be fired at the same time. It may also be processed into multiple layers.

Further, each ground 44a, 46a is formed as a metal plated layer on the surface of each ceramic substrate 488, 448, respectively, and metal plates 43aS, 3
08 is for reinforcement and electrostatic breakdown prevention, and the top ceramic layer 4 to avoid the influence of noise.
3 and the uppermost ceramic layer are integrally embedded in the clay layer 48, and these constitute the metal plate layer 30 and the metal plate layer 43a. These and the ceramic substrate are joined by a metal plating layer applied to the ceramic substrate, and furthermore, these metal plates 43aS and 308 are plated with metal on their surfaces to provide internal reinforcement and electrostatic damage prevention. ] [・, becomes a noise prevention layer.

Further, the holes in each ceramic substrate are portions constituting through holes or contact terminals, and these portions are plated so as to be excluded from the metal plating serving as the ground. Then, these are connected to necessary wirings among the wirings provided in each layer.

By the way, as shown in F below, signal wiring, address wiring,
By sandwiching the power supply line with ground wiring, a structure that is resistant to electrostatic damage and noise can be achieved. Note that the signal line wiring 43b and the address line wiring 45a.

These power supply lines 47a and the like appear as wiring 14 in FIG. 1.

With this configuration, even if high-voltage static electricity enters the key from the body of the person holding the key, the Zener diode layer 42 receives it and breaks down, and the high-voltage static electricity is transferred to the gold on the back side. Falling from layer to ground.

As a result, no high voltage is applied to the ROM chip, and there is no risk of destroying the ROM due to static electricity.

Therefore, under normal usage conditions, even if high-voltage static electricity is applied to the key from the body of the person holding the key, or even if static electricity is charged or applied to the key, there is no risk of damage to the built-in memory. There are almost no keys, and it can be used easily like a regular key.

In addition, in Fig. 4, (the part indicated by the dotted line at the edge of the recess 20 is the key to seal the 20 part in the recess). 7
It is 25.

Next, to explain the overall operation, when the key 10 is inserted into the receptacle 50 and a predetermined rotation is made, the switch 53 disposed at the bottom of the receptacle 50 switches to "O".
N” and the processor 101 of the target 7 stem 100
is activated or an interrupt occurs. At this time, the claws of the plate 56 simultaneously fall into the cam grooves, and the pogo pin groups 54, 54 . of the receptacle 50 . Fist -, 55, 55
, -... descend and the corresponding contact terminal group 17 of the key 10
．． 17.・φ・, 18, 18・φ・, respectively.

Therefore, the processor lot has bus 104 and pogo pin group 54 . of receptacle 50 . 54. ....

55.55. . . . and the key contact terminal group 17, 17 .・Φ・, and contact terminal 7! TI8,18. - Send a message to the key 10 side to access the memory 40 of the key 10 via the selected fist. This access key has 7 bows and 40 memory.
The predetermined data is read from the accessed address of the memory 40.

The read data is read out by touching M+Ai on the key 10 side, /
J! 07,17. ..., 18.18. ...
selected one of them, contact 11 on the receptacle 50 side
Group 54. 54. . . , 55.55, the selected one is passed to the processor IO1 via the bus 104, and predetermined processing is performed.

Now, here, the memory 40 of the key 10 is stored in the processor 1.
It is allocated to a part of the address space of 01,
RAM 10 in the system of the target system 100
2, it is accessed in the same way as the program ROM 103.

Then, upon obtaining program information or data information such as commands stored in the memory 40, the processor 101 performs a predetermined operation to retrieve specific information in the memory or external storage device of the target system 100. will be accessed.

The memory 40 of the key 10 includes PROM and EPROM.

When using E2 PROM etc., the programmer can
You can program the cup. The key may contain, for example, 16,384 bits of information via hybrid technology, emulating other similar FROMs up to 18,384 bits.

The data stored in the memory 40 is written in whole or in parts when the key 10 is inserted into the receptacle 50.
Read or! J[i can be done.

The information stored in the memory 40 in the key 10 may include a large number of personal and unique codes (50-100 characters) that allow access to the main system. The key 10 also includes the Tl portion of the terminal device, without which the terminal may not operate properly.

As explained above, in the embodiment, a circular gold contact is used as the contact terminal of the key, but this is not limited to gold. Also, metal is used for the parts fixed around the contacts, but when the contacts are made of gold, gold washers are often fused during the manufacturing process, making it easy to remove them. Unified 1! Jru. Moreover, when using a metal washer other than the metal washer, it is preferable to interpose a low melting point solder 5 and fix it.

Note that the washer is not limited to a circular ring-shaped washer, and may be a square ring.

In addition, in the embodiment, the contact terminals are provided on the front side, which is the same side as the side containing the memory, but they may be provided on the back side or on the front and back sides respectively. It may be provided on the upper or lower side or on the lower side of -L where the ridges/valleys are provided.

Furthermore, in the embodiment, the key has a built-in memory, but if this memory is to be written using a RAM, a battery can be built into the key. Of course, the contact terminal and the memory terminal may be connected via a buffer circuit such as an amplifier or the like.

1] In the 1!1 example, does the key have a built-in E2PROM memory? Of course, EPROM, FROM, etc. can be used.

In the example, does the key have a built-in memory?
Memo]! Of course, it is possible to use a card with a built-in memory instead of a key with a built-in memory.

[Effects of the Invention] As can be understood from the explanation below, according to the present invention, a key or a card is used to connect the potato 11 and the contact terminal directly or indirectly connected to the terminal of this memory. In the constructed security key, the key 7°, < is inserted into the receptacle provided on the target/stem, and the memory is inserted into the target/stem by contacting the contact terminal with the contact pin provided on this receptacle.
Since it is a part of the memory of the stem and the contact terminal is provided with a ring-shaped conductor, the contact pin on the receptor side of the target/stem can be guided inside the ring.

As a result, the 1i continuation between them is guaranteed. Moreover, since the contact end γ is a conductive ring and its edge has a buff 1 effect, insertion and removal C can be performed several times or tens of thousands of times ( As a result of the X touch, the contact pin side of the receptacle side or the contact terminal of the key (i
Even if wear or misalignment occurs in the ring, the position will be corrected by contacting the ring around the ring.
The contact condition is ensured, and furthermore, the contact surface is prevented from peeling11.
Also useful ＼γ-).

Therefore, the connection can be made reliably even after several times of insertion and removal.

[Brief explanation of drawings]

Figure 1 is a block diagram of the safety/stem showing the key and receptacle, Figure 2 is a perspective view of the key separated from the receptacle, and Figures 3 (a) and (b) show the contact terminals on the key side, respectively. An explanatory diagram of the connection relationship between the receptacle and the pogo pin (contact pin), Fig. 4 is an enlarged sectional view of the head portion thereof, and Fig. 5 is an explanatory diagram of the substrate constituting each ceramic layer before the key is laminated. . 10...Key, 13...Nyaft part, 12...Head, L 15, 16...Wano/Ya, 17.18.
... Contact terminal, 20 ... Hollow, 21 ... Bonding terminal 1 24 ... Ceramic layer, 23 ... Wiring, 30.4
3a... Metal plate layer, 40... Memory, 41... Chip, 42... Ener diode substrate layer, 43...
・First ceramic layer, 44... Second ceramic layer, 45... Third ceramic layer, 46... Fourth ceramic layer, 47... Fifth ceramic layer, 47... Sixth ceramic layer. Ceraminox layer, 50... receptor, 51... socket, 52.../linda, 53...
Switch, 54.55...pogo pin. Patent J11 applicant L1 Electronic Materials Co., Ltd. Agent
Patent Attorney 2) 4 Kajiyama Kakeru Figure 3 ((1) Figure 4 Figure 5 43aS

Claims (3)

[Claims] (1) A security key consisting of a key or card having a memory and a contact terminal connected directly or indirectly to a terminal of the memory, in which the key or card is inserted into a receptacle provided in a target system. , the memory becomes a part of the memory of the target system when the contact terminal contacts a contact pin provided on the receptacle, and the contact terminal is provided with a ring-shaped conductor. A security key featuring: (2) A key has a built-in memory in its head part and a plurality of contact terminals arranged in its shaft part, and the contact pin is a pogo pin, and the contact terminal is in contact with the pogo pin. The security key according to claim 1, characterized in that it is connected to a target system. (3) The key has a substrate made of laminated ceramic layers, the ring-shaped conductor is a conductive metal washer, and the contact terminal is formed by fixing the metal washer on a gold contact. , and provided corresponding to the terminals of the memory on the front side or the back side or the front and back sides on the same side as the side containing the memory, and the memory chip or the substrate to which this chip is bonded is a Zener diode. 3. The security key according to claim 2, wherein the security key is placed on an antistatic layer.