JPH07160354A - Semiconductor safety device - Google Patents

Abstract

PURPOSE:To stop the operation of an arithmetic mechanism with a usable period and prevent an illegal act by installing a mechanism which can read and write a starting time in the arithmetic mechanism wherein a semiconductor arithmetic device is placed in operation, and then registering the actuation time in a starting time file when the starting time is newer than a previously recorded date and time or outputting an error message when older. CONSTITUTION:A ledger file is read in the arithmetic mechanism with the use period first and then a specific input value array to the semiconductor arithmetic unit and the period of the arithmetic mechanism with the usable period are recognized with the cipher of the ledger. Here, a specific value of a device as an object of safety, obtained by executing the arithmetic mechanism, to the semiconductor arithmetic unit is read in. It is investigated whether or not the specific input value of the device as the object of safety to the semiconductor arithmetic unit is registered and when not, a message is outputted and the safety device is stopped. When the specific value is registered, the date of starting is read in and if there is a contradiction, the safety device is stopped.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvement of a computing mechanism with a term of use, which is peculiar to a semiconductor computing device.

[0002]

2. Description of the Related Art In recent years, a security system, that is, a semiconductor safety device that incorporates a semiconductor processing device composed of a CPU or the like has been used. In order to investigate the safety with this semiconductor safety device, it is necessary to attach a specific symbol, that is, a code, to the target machine (Machine) .For this reason, the input value attached to the semiconductor arithmetic device and the semiconductor arithmetic device are The semiconductor arithmetic device performs a predetermined arithmetic operation by using the expiration date of the arithmetic mechanism to be used. The cipher code thus obtained, that is, a specific symbol, is registered in a file to be installed in a ledger, and this is used as a keyword to check the security of the target machine.

FIG. 1 clarifies an arithmetic method for creating such a specific symbol. A specific input value 1 (see FIG. 1) to the semiconductor arithmetic device is 8 digits, and the semiconductor arithmetic device has an expiration date. The calculation mechanism 2 of 1 determines by performing rearrangement for each bit and predetermined calculation for each 6-digit numerical value (see FIG. 2). That is, the specific input value to the semiconductor arithmetic device is 1 to 2, 3 to 4, 5 in the 8-digit numerical value.
6 and 7 and a part of 7 and 8, for example, even number and odd number are exchanged, and then a fixed number is subtracted. Regarding the expiration date, for example, the bit formed by year × 10,000 + month × 100 + day is replaced from the opposite and a fixed number is added to this.

The result of rearranging in this way is shown in FIG. 3. An appropriate numerical value, that is, a random number is set and the cipher 3 consisting of 15 digits is registered in the ledger file.

Next, the flow for investigating the security will be explained with reference to FIG. 4. First, the safety device is operated to read the ledger file into the arithmetic mechanism with the expiration date. A specific input value to the semiconductor arithmetic device and the expiration date of the operation mechanism with the expiration date are recognized by the inverse operation of the obtained operation. Here, a specific input value 1 to the semiconductor arithmetic device of the device which is the object of safety obtained by executing the arithmetic mechanism with the expiration date is read. As a result, it is checked whether or not the specific input value 1 to the semiconductor arithmetic unit of the device to be safety is registered, and if it is not registered, a message is output.

On the contrary, when registered, it is checked whether or not there is a contradiction in the activated date, and if there is a contradiction, a message is output, and when there is no contradiction, it returns.

[0007]

In such a semiconductor safety device, since the administrator can arbitrarily change the start date of the target machine, the arithmetic mechanism is used by operating this date. The deadline can be extended.
But this cannot be investigated.

The present invention has been made under these circumstances, and in particular, provides a novel semiconductor safety device.

[0009]

Means for Solving the Problems A semiconductor arithmetic device that performs an arithmetic operation with a specific input value, a device that is represented by a specific symbol and is a target of safety, and an arithmetic mechanism with a expiration date for operating the semiconductor arithmetic device. A cipher obtained by the operation of the semiconductor arithmetic device with the expiration date of the previous term and a specific symbol, a ledger for registering a target device by the cipher, and a start attached to an arithmetic mechanism with a expiration date for operating the semiconductor arithmetic device The semiconductor safety device according to the present invention is characterized by a time reading / writing mechanism.

[0010]

In the semiconductor safety device according to the present invention, by installing a mechanism capable of reading and writing the activation time in a computing mechanism with a expiration date for operating the semiconductor computing device, it is activated every time the computing mechanism with a expiration date is activated. Compared with the date and time recorded in the time file, if the start time is newer than the date and time recorded in advance in the calculation mechanism with expiration date, it is registered in the start time file, and if it is old, an error message is output and the expiration date Stop the operation of the arithmetic unit.

[0011]

Embodiment An embodiment according to the present invention will be described with reference to FIG. As described in the action column, in the semiconductor safety device according to the present invention, a mechanism capable of reading / writing the startup time is added to the arithmetic mechanism with a expiration date for operating the semiconductor arithmetic device, and the operation status of this semiconductor safety device is This will be described with reference to FIG.

The semiconductor safety device according to the present invention incorporates a semiconductor arithmetic device composed of a CPU or the like, and it is necessary to attach a specific symbol to the machine for which the safety is to be investigated. For this purpose, the semiconductor arithmetic device performs a predetermined arithmetic operation using a specific symbol or input value attached to the semiconductor arithmetic device and the expiration date of the arithmetic mechanism used in the semiconductor arithmetic device. The cipher code thus obtained, that is, a specific symbol, is registered in a file to be installed in a ledger, and this is used as a keyword to check the security of the target machine.

Since the calculation method for creating such a specific symbol is as described in the section of the prior art, a detailed description will be omitted, but the specific input value (see FIG. 1) to the semiconductor processing device is 8 digits. Then, the operation mechanism with the expiration date for operating the semiconductor operation device is determined by performing permutation and predetermined operation for each 6-digit numerical value 2 (see FIG. 2). That is, the specific input value to the semiconductor arithmetic unit is formed by replacing a part of 1 and 2, 3, 4, 5, 6 and 7 and 8, for example, even number and odd number in the 8-digit numerical value, and then subtracting a constant number. . Regarding the expiration date, for example, year x 1
It is formed by replacing the bit constituted by 000 + month × 100 + day from the reverse and adding a fixed number thereto. A calculation mechanism for operating the semiconductor calculation device A time-limited calculation is performed based on each 6-digit numerical value (see FIG. 2) of the calculation mechanism, as shown in FIG. Register with.

Next, the flow for investigating the safety will be described with reference to FIG. After reading the ledger file into the calculation mechanism 2 with the expiration date,
b. By the encryption of this ledger, a specific input value to the semiconductor arithmetic device and the deadline of the arithmetic mechanism with the expiration date are recognized by the inverse operation of the operation for obtaining this. Where c.
A specific input value a to the semiconductor arithmetic device of the safety target device obtained by executing the arithmetic mechanism with the expiration date
Read in. As a result d. It is investigated whether or not a specific input value a to the semiconductor arithmetic unit of the device to be safety is registered, and if it is not registered, e. Output a message and stop the safety device.

On the other hand, if it is registered, f. Read the starting date, that is, the date when the computing mechanism with the expiration date last operated, and g. Read the last operating time. Here, f and g are compared to investigate whether or not there is a contradiction in the starting date and time, and if there is a contradiction, a message is output and the safety device is stopped.

If there is no contradiction, the start date and time are written in the start file included in the arithmetic unit with a six-digit expiration date, and the return instruction is issued.

[0017]

In the conventional security system, the user (User) who uses the arithmetic mechanism with the expiration date can change the expiration date and illegally extend the expiration date. By adding a function to investigate the driving date and time every time the operating mechanism with expiration date operates,
It is possible to prevent fraud.

[Brief description of drawings]

FIG. 1 is a diagram showing a specific input value to a semiconductor arithmetic device.

FIG. 2 is a diagram showing a calculation mechanism with a use period attached to a semiconductor calculation device.

FIG. 3 is a diagram showing a cipher for a ledger.

FIG. 4 is a diagram showing a flow of operation of a conventional security system.

FIG. 5 is a diagram showing a flow of operation of the security system of the present invention.

[Explanation of symbols]

1: a specific input value to the semiconductor arithmetic device, 2: an arithmetic mechanism attached to the semiconductor arithmetic device with an expiration date, 3: cipher for a ledger,

Claims (1)

[Claims] 1. A semiconductor arithmetic device for performing an arithmetic operation with a specific input value, a device which is represented by a specific symbol and which is an object of safety, an arithmetic mechanism with an expiration date for operating the semiconductor arithmetic device, and an expiration date for the previous term. And a cipher obtained by the operation of the semiconductor arithmetic device with a specific symbol, a ledger registered by the cipher, and a read / write mechanism for starting time attached to an arithmetic mechanism with a expiration date for operating the semiconductor arithmetic device. A semiconductor safety device characterized by: