CN2217235Y - Device for keeping soft ware of computer secret and protection - Google Patents
Device for keeping soft ware of computer secret and protection Download PDFInfo
- Publication number
- CN2217235Y CN2217235Y CN94217464U CN94208392U CN2217235Y CN 2217235 Y CN2217235 Y CN 2217235Y CN 94217464 U CN94217464 U CN 94217464U CN 94208392 U CN94208392 U CN 94208392U CN 2217235 Y CN2217235 Y CN 2217235Y
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- Prior art keywords
- pin
- utility
- interface
- computer interface
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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- 238000004891 communication Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
The utility model relates to an encryption protection device for microcomputer software. The utility model is characterized in that an electrically erasable read-only memory unit U1 is used as a data read/write unit; the chip selection pin P1 of the U1 is connected with the pin 4 of a computer interface (1), the clock pin P2 of the U1 is connected with the pin 5 of the computer interface (1), the data input pin P3 of the U1 is connected with the pin 6 of the computer interface (1), and the data output pin P4 of the U1 is connected with the pin 3 of the computer interface (1). The utility model has the advantages of simple structure and simple manufacture, the utility model is not provided with any sequence circuit, and therefore, the utility model doesn't influence the communication signals between a computer and a printer.
Description
The utility model relates to a kind ofly can carry out encipherment protection to microcomputer software, thereby prevents the device that this software is illegally used.
Because the software that operates on the microcomputer is easy to duplicate, just caused the illegal use of many commodity softwares, as long as the disabled user duplicates the commodity software that a software vendor sells, just can not pay with and use this software, this has damaged the interests of software vendor greatly.Therefore, software vendor generally all carries out encipherment protection to commodity software, to prevent the not authorized use to software.For reaching this purpose, a kind of very popular method is to join a protective device for every cover software at present, wherein has the critical data of running software.
This device generally is to have comprised circuit kit to preserve the service data of software, and the communication signal between transmission computing machine and the printer, product as the world, Beijing Electronic Technology Development Co.--software security dog, its circuit structure more complicated, production phase is long, operation is loaded down with trivial details, will comprise a plurality of operations such as circuit making sheet, element processing, welding, packing usually; And its performance is difficult stable, makes mistakes slightly in case selected low-quality element for use or made, and just can cause the influence to the communication signal of computing machine and printer, causes to print and makes mistakes.
The purpose of this utility model provides the encipherment protection device that a kind of circuit structure is simple, making easily, does not influence communication signal between computing machine and the printer.
The purpose of this utility model is achieved in that by the sheet with a slice serial input and output electrically-erasable formula read-only memory selects pin to link with No. 4 pins of computer printer interface, the clock pin links with No. 5 pins of computer printer interface, the data input pin links with No. 6 pins of computer printer interface, the data output pin links with No. 3 pins of computer printer interface, power supply and ground link with 16 pin and 25 pin of computer printer interface respectively, can guarantee that software can accurately read the data that leave in this chip and not influence communication signal between computing machine and the printer.
The utility model advantage compared with prior art is: because only use a chip, can be soldered directly on the lead-in wire of enclosure interface, so structure is very simple, be easy to make; It is independent of the communication signal line between computing machine and the printing seal machine simultaneously, and does not contain any sequential circuit, so can not influence the communication signal between computing machine and the printer.
The structural drawing of Fig. 1 encipherment protection device.
Below in conjunction with Fig. 1, describe details of the present utility model and working condition in detail.
This device comprises interface (1) and interface (2), and wherein (1) is and the interface of computing machine, and (2) are and the interface of printer, and they have 25 pins respectively, interconnect one by one by 25 leads; In addition, the chip select pin P1 of chip U1 is connected on 4 pin of (1), clock pin P2 is connected on 5 pin of (1), data input pin P3 is connected on 6 pin of (1), data output pin P4 is connected on 3 pin of (1), ground wire P5 and P6 are connected on 25 pin of (1), and power lead P8 pin is connected on 16 pin of (1), and the P7 pin is unsettled; Here, the electrically-erasable formula read-only memory U1 of serial input and output can adopt CAT33C101 or 93C46A.
Because U1 is the electrically-erasable formula read-only memory of serial input and output, but under+5V power supply operate as normal, its ground wire P5 and P6 pin are received 25 pin of (1) jointly; Send high level by software to the pin 16 of printer interface (1), pin 5 sends pulse, and pin 4 sends high level.Make power lead P8, clock pin P2 and the chip select pin P1 of U1 obtain normal condition of work respectively; At this moment software can send the order that reads and writes data to the data input pin P3 of U1 by 6 pin of (1).Corresponding data outputs to the pin 3 of (1) by U1 through data output pin P4, is read back by software, then can obtain these data.
When computing machine and printer communication, U1 is in disarmed state owing to there is not normal condition of work, and the signal wire intercommunication one by one between (1) and (2), so U1 is to not influence of communication between computing machine and the printer.
Claims (2)
1. microcomputer software encipherment protection device, this device comprises: date read-write cell and interface; It is characterized in that: use a slice electrically-erasable formula read-only memory U1 as date read-write cell; The sheet of U1 selects pin P1 to link to each other with computer interface (1) pin 4, the clock pin P2 of U1 links to each other with computer interface (1) pin 5, the data input pin P3 of U1 and computer interface (1) pin 6 link, and the data output pin P4 of U1 and computer interface (1) pin 3 link.
2. the described device of root a tree name claim 1 is characterized in that 25 pins of interface (1) and interface (2) interconnect one by one via lead respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94217464U CN2217235Y (en) | 1994-04-14 | 1994-04-14 | Device for keeping soft ware of computer secret and protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN94217464U CN2217235Y (en) | 1994-04-14 | 1994-04-14 | Device for keeping soft ware of computer secret and protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2217235Y true CN2217235Y (en) | 1996-01-10 |
Family
ID=33832909
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN94217464U Expired - Fee Related CN2217235Y (en) | 1994-04-14 | 1994-04-14 | Device for keeping soft ware of computer secret and protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2217235Y (en) |
-
1994
- 1994-04-14 CN CN94217464U patent/CN2217235Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Chuanjing Document name: payment instructions |
|
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Liu Chuanjing Document name: Notice of termination |
|
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |