JPH026697Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a tabletop cryptographic device in which the front part of the cover is covered with a lid provided with a lock so that the cover cannot be easily removed from the outside.

In data communication systems, data is encrypted without being transmitted as is, but it is desirable that the encryption device be easy to use, and that others cannot easily tamper with the inside of the encryption device. Of course it is good. It cannot be said that the housing structure of the conventional desk-top cryptographic device fully satisfies the above-mentioned desired conditions.

[Conventional technology]

A conventional desk-top cryptographic device was constructed so that the cover 1 was removed from the frame 4 and viewed as shown in the perspective view of FIG. A data storage device 30 composed of a rewritable read-only memory EPROM or the like is built into the frame 4, and the lid 2 is connected to the front side of the frame 4 with a hinge 3, as shown by the arrow 31.
The lid can be opened and closed like this. When the lid 2 is opened, at least a keyboard and a power switch are provided on the front side of the frame, although they are not clearly shown.
A user of the encryption device makes predetermined connections to the terminal block 32 and cord connector 33, opens the lid 2, and turns on the power switch to obtain encrypted data or decrypted signals. When desired, the encryption processing method can be changed by operating the keyboard. Usually, the frame 4 is covered with a cover 1,
A fixing piece 34 was used to fit into the front part of the frame 4, and the cover 1 and the frame 4 were fixed with screws 5.

[Problem that the invention attempts to solve]

Since it is extremely easy to remove the cover 1 of the encryption device, apply a connection line directly to the data storage device 30, and read out the stored data, conventional simple desk-top encryption devices have the disadvantage of poor secrecy. .
The present invention aims to eliminate such drawbacks.

[Means for solving problems]

The configuration adopted in the present invention has a data storage device built into the frame, at least a keyboard for setting and canceling encrypted data and an operating power switch on the front of the frame, and a lid that can be opened and closed at the front. In the tabletop cryptographic device configured with a cover that covers the frame, the cover is formed into a cylindrical shape that completely covers the frame, and two flat tongue pieces are provided in a direction protruding from the front side of the frame toward the lid. Each tongue piece is fixed to the front part and the cover on the back side of the front part of the frame, each tongue piece has a hole through which a screw can be inserted and they can be fastened together, and the lid is prohibited from opening to the cover. A key is used to operate the lock using a key.

〔Example〕

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention.
FIG. 1A shows the entire state in which the lid 12 is opened, and FIG. 1B
only shows the lid 12 closed. Also the first
In FIG. A, the dashed-dotted line and the symbols . and . signify that the cross-sectional views cut in the direction of the dashed-dotted line and viewed in the direction of the arrow are shown in FIGS. 2 and 3.

In FIG. 1A, 11 is a cover (corresponding to 1 in FIG. 5), which is formed into a cylindrical shape that covers the entire frame 14, 12 is a lid (corresponding to 2 in FIG. 5),
13 is a hinge part (corresponding to 3 in Fig. 5), 14-1
is the frame front part, 15 is a screw, 16 and 17 are flat tongue pieces, and at the back side of the frame front part 14, as shown in FIG.
is fixed to the cover 11 and has a screw hole and a screw 15.
can be inserted. 18 is a lock which prohibits opening of the lid 12 to the cover 11; 19 is a key fitting; and 20 is a key. 22 is the frame front part 14
-1 is a keyhole, 27 is a keyboard, and 28 is a power switch. 2 in the side sectional view of Figure 2.
Reference numerals 1 and 24 are members used for guiding and buffering when inserting the cover 11 into the frame 14, and are spot-welded to the frame 14. 25 indicates a fixing screw. It is preferable to attach legs 29 to the cover 11 as shown in FIG. 2 so as to prevent the cover 12 from colliding with a desk surface or the like when the lid 12 is folded forward.

As shown in FIG.
Insert as shown in 5. A data storage device 30 is built into the frame 14 . A hinge 13 is provided between the lid 12 and the frame 14. As shown in FIGS. 1A and 3, flat tongues 16 and 17 are provided so as to protrude from the frame front part 14-1 toward the lid 12, and are screwed into each other by inserting screws 15 into them. It will be done. When the lid 12 is closed by rotating it in the direction shown by the arrow 26, the key 20 is inserted into the lock 18 as shown in FIG. 1B. When the key 20 is rotated in the direction shown by the arrow 23, the key metal fitting 19 moves into the keyhole 22.
Go inside and get locked up. Remove the key 20. Therefore, since the flat tongues 16, 17, the keyboard 27, and the power switch 28 are hidden inside the lid 12, only the operator/maintenance person in possession of the key 20 can operate the encryption device. Of course, the key and lock combination can be of other constructions.

[Effect of idea]

In this way, according to the present invention, even if the structure is relatively simple, a key is required to open the lid, and the internal data storage device cannot be easily accessed by removing the cover of the encryption device. As a cryptographic device, it is possible to prevent leakage of processing methods and data, making it easy to maintain line safety. Therefore, the reliability of transmitted and received data is improved.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the configuration of an embodiment of the present invention, FIGS. 2 and 3 are partial side sectional views of FIG. 1, and FIG.
The figure is an explanatory diagram of inserting the cover into the frame in FIG. 1, and FIG. 5 is a perspective view of the conventional cryptographic device with the cover removed. 1,11...cover, 2,12...lid, 4,1
4...Frame, 14-1...Frame front part,
15...screw, 16, 17...flat tongue piece, 18
...Lock, 19...Key metal fittings, 20...Key.

Claims (1)

[Scope of utility model registration request] A data storage device is built into the frame, and at least a keyboard for setting and canceling encrypted data and an operating power switch are provided on the front of the frame, and a lid that can be opened and closed in front is provided, and a cover that covers the frame is provided. In the desktop encryption device, the cover is formed into a cylindrical shape that completely covers the frame, and has two flat tongue pieces projecting from the front side of the frame toward the lid, and each tongue piece is attached to the frame. It is fixed to the front part and the cover on the back side of the front part, each tongue piece has a hole through which a screw can be inserted and they can be fastened to each other, and a lock is attached to the lid to prevent the cover from being opened. A desktop cryptographic device that operates with a lock.