CN109446849B - Nonvolatile SRAM data encryption device - Google Patents
Nonvolatile SRAM data encryption device Download PDFInfo
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- CN109446849B CN109446849B CN201811586212.7A CN201811586212A CN109446849B CN 109446849 B CN109446849 B CN 109446849B CN 201811586212 A CN201811586212 A CN 201811586212A CN 109446849 B CN109446849 B CN 109446849B
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- power supply
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- upper cover
- circle
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- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000005520 cutting process Methods 0.000 description 5
- 229920001971 elastomer Polymers 0.000 description 3
- 239000000806 elastomer Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910000679 solder Inorganic materials 0.000 description 3
- 238000005476 soldering Methods 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/78—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data
- G06F21/79—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer to assure secure storage of data in semiconductor storage media, e.g. directly-addressable memories
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F21/00—Security arrangements for protecting computers, components thereof, programs or data against unauthorised activity
- G06F21/70—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer
- G06F21/81—Protecting specific internal or peripheral components, in which the protection of a component leads to protection of the entire computer by operating on the power supply, e.g. enabling or disabling power-on, sleep or resume operations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- Physics & Mathematics (AREA)
- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
- Storage Device Security (AREA)
- Semiconductor Memories (AREA)
Abstract
The invention provides a nonvolatile SRAM data encryption device which comprises a shell, an SRAM, a power supply wire and a first power supply, wherein the SRAM, the power supply wire and the first power supply are arranged in the shell, the first power supply supplies power to the SRAM through the power supply wire, the power supply wire comprises a first wire connected with a positive pole of the first power supply and a second wire connected with a negative pole of the first power supply, the shell comprises a base and an upper cover, the second power supply is arranged at the upper cover and comprises a first terminal and a second terminal respectively connected with the positive pole and the negative pole of the second power supply, when the upper cover is closed with the base, the first terminal and the second terminal are respectively communicated with the first wire and the second wire, and the upper cover is provided with a through hole. The SRAM chip has the advantages of being simple in structure, low in processing cost, high in production efficiency and the like due to the fact that the technical scheme is adopted.
Description
Technical Field
The invention relates to the technical field of electric digital data processing, in particular to a nonvolatile SRAM data encryption device.
Background
SRAM Static Random-Access Memory (SRAM) is one type of Random Access Memory. The memory is characterized in that the data stored in the memory can be kept constantly as long as the memory is kept powered on. However, when the power supply is stopped, the data stored in the SRAM is lost (referred to as a volatile memory).
When the SRAM chip is used, firstly, an external power supply is connected, and secondly, the power supply and the SRAM chip are packaged in the shell together. The chip has the defects that when a stealer steals the secret, the stealer can read out the data in the chip through pins of the chip only by opening the shell under the condition of keeping the power supply of the power supply undamaged, and the confidentiality is poor.
Disclosure of Invention
Based on the characteristic that the data disappear after the SRAM is powered off, the invention provides a data encryption device in combination with a physical mechanism.
The technical scheme of the invention is as follows:
the utility model provides a nonvolatile SRAM data encryption device, includes casing, SRAM, power supply wire and first power set up inside the casing, and first power is the SRAM power supply through the power supply wire, the power supply wire includes the first wire that links to each other with first power anodal and the second wire that links to each other with first power negative pole, the casing includes base and upper cover, upper cover department is equipped with the second power, the second power includes first terminal and the second terminal that links to each other with second power anodal and negative pole respectively, and when upper cover and base were closed, first terminal and second terminal were linked together with first wire and second wire respectively, the upper cover is equipped with the through-hole.
Before the SRAM chip is packaged, an independent first power supply system is arranged at a base inside the shell, the power supply is a first power supply, and the first lead and the second lead are exposed leads. And when the upper cover is closed, a closed space is formed between the upper cover and the base, and the shell is communicated with the outside only through the data input end, the data output end and a through hole reserved in the upper cover. The upper cover is provided with a second power supply, when the upper cover is closed, a first terminal and a second terminal of the second power supply are pressed on the exposed first lead and the exposed second lead, and the first power supply and the second power supply are connected in parallel to supply power for the SRAM chip. After the shell is closed, the first wire or the second wire between the first terminal and the second terminal is cut off by using the long rod tool through the through hole, so that the first power supply fails, and the SRAM chip is independently powered by the second power supply. As long as the upper cover of the shell is opened, the first terminal or the second terminal can be separated from the first lead and the second lead, the SRAM stops supplying power, and the data in the chip disappears, so that the confidentiality effect is achieved.
The diameter of the through hole is 0.5-1.5mm, which prevents most existing tools from reconnecting the severed first or second wire through the through hole.
The opening of the upper surface of the upper cover of the through hole is a first circle, the opening of the lower surface of the upper cover of the through hole is a second circle, and the connecting line between the circle centers of the first circle and the second circle is an arc line. The horizontal distance between the centers of the first circle and the second circle is larger than the diameter of the first circle or the second circle.
In order to further prevent a stealer from reconnecting the wires through the through holes, the through holes are arc-shaped. During the processing of the equipment, a tool for cutting off the wire at the through hole is matched with the radian of the arc-shaped through hole. The cutting tool is a special tool used in chip packaging, and a stealer can hardly obtain a connecting tool matched with the arc-shaped through hole, so that confidentiality is further enhanced.
Preferably, the arc of the through hole is an arc, the first wire or the second wire is designed to be used for the broken wire segment to intersect with the circle where the arc is located, and the matched cutting tool only needs to penetrate into the shell along the through hole to contact the broken wire segment, so that the broken wire segment is cut off.
The power supply lead is connected with the first terminal or the second terminal by adopting a soldering tin welding mode.
The power supply wire is positioned between the first terminal and the second terminal and is provided with a groove below a part connected with the first power supply.
The part that the power supply wire is located between first terminal and the second terminal and links to each other with first power is the position of cutting off first power supply system, and this application adopts the rod instrument to cut off this part wire downwards along the through-hole, and the recess of wire below is more favorable to the cutting off operation of rod instrument to the wire.
The invention has the advantages and positive effects that: by adopting the technical scheme, the SRAM chip has the advantages of high data confidentiality, simple structure, low processing cost, high production efficiency and the like.
Drawings
FIG. 1 is a front view of the present invention
FIG. 2 is a top view of the present invention
FIG. 3 is a schematic view of the upper cover of example 1
FIG. 4 is a schematic view of the upper cover of example 2
In the figure:
1. housing 2, SRAM 3, first power supply
4. Power supply wire 11, base 12, upper cover
111. Elastomer 112, groove 131, first terminal
132. Second terminal 41, first wire 42, second wire
14. Through hole
Detailed Description
Example 1
As shown in fig. 1, 2 and 3, the invention
The utility model provides a nonvolatile SRAM data encryption device, includes casing 1, SRAM2, power supply wire 4 and first power 3 set up inside casing 1, and first power 3 is the SRAM2 power supply through power supply wire 4, power supply wire 4 includes first wire 41 and the second wire 42 that links to each other with first power 3 negative pole that is connected with first power 3 positive pole, casing 1 includes base 11 and upper cover 12, upper cover 12 department is equipped with the second power, the second power includes first terminal 131 and the second terminal 132 that link to each other with second power positive pole and negative pole respectively, and when upper cover 12 and base 11 are closed, first terminal 131 and second terminal 132 are linked together with first wire 41 and second wire 42 respectively, upper cover 12 is equipped with through-hole 14.
The opening of the through hole 14 on the upper surface of the upper cover 12 is a first circle, the opening of the through hole 14 on the lower surface of the upper cover 12 is a second circle, and the connecting line between the centers of the first circle and the second circle is an arc line.
The elastic body 111 is arranged at the base 11 corresponding to the first terminal 131 and the second terminal 132, and the elastic body 111 is positioned at one side of the first wire 41 or the second wire 42 away from the first terminal 131 or the second terminal 132.
The base 11 is provided with an elastomer groove.
The power supply wire 4 is provided with a groove 112 below a portion between the first terminal 131 and the second terminal 132 and connected to the first power source 3.
The working procedure of this example:
after the SRAM2 chip is mounted on the base 11 of the case 1, the case top 12 is fixedly connected to the base 11, and the first terminal 131 and the second terminal 132 press the power supply wire 4, so that the elastic body 111 is compressed. Through the through-hole 14, the portion of the power supply wire 4 is cut down the through-hole 14 by a rod-shaped tool, and the through-hole 14 is blocked with solder.
Example 2
As shown in fig. 1, 2 and 4
The utility model provides a nonvolatile SRAM data encryption device, includes casing 1, SRAM2, power supply wire 4 and first power 3 set up inside casing 1, and first power 3 is the SRAM2 power supply through power supply wire 4, power supply wire 4 includes first wire 41 and the second wire 42 that links to each other with first power 3 negative pole that is connected with first power 3 positive pole, casing 1 includes base 11 and upper cover 12, upper cover 12 department is equipped with the second power, the second power includes first terminal 131 and the second terminal 132 that link to each other with second power positive pole and negative pole respectively, and when upper cover 12 and base 11 are closed, first terminal 131 and second terminal 132 are linked together with first wire 41 and second wire 42 respectively, upper cover 12 is equipped with through-hole 14.
The axis of the through hole 14 is perpendicular to the plane of the upper cover 12.
The elastic body 111 is arranged at the base 11 corresponding to the first terminal 131 and the second terminal 132, and the elastic body 111 is positioned at one side of the first wire 41 or the second wire 42 away from the first terminal 131 or the second terminal 132.
The base 11 is provided with an elastomer groove.
The power supply wire 4 is provided with a groove 112 below a portion between the first terminal 131 and the second terminal 132 and connected to the first power source 3.
The working procedure of this example:
after the SRAM2 chip is mounted on the base 11 of the case 1, the case top 12 is fixedly connected to the base 11, and the first terminal 131 and the second terminal 132 press the power supply wire 4, so that the elastic body 111 is compressed. Through the through-hole 14, the portion of the power supply wire 4 is cut down the through-hole 14 by a rod-shaped tool, and the through-hole 14 is blocked with solder.
Example 3
As shown in fig. 1, 2 and 3, the invention
The utility model provides a nonvolatile SRAM data encryption device, includes casing 1, SRAM2, power supply wire 4 and first power 3 set up inside casing 1, and first power 3 is the SRAM2 power supply through power supply wire 4, power supply wire 4 includes first wire 41 and the second wire 42 that links to each other with first power 3 negative pole that is connected with first power 3 positive pole, casing 1 includes base 11 and upper cover 12, upper cover 12 department is equipped with the second power, the second power includes first terminal 131 and the second terminal 132 that link to each other with second power positive pole and negative pole respectively, and when upper cover 12 and base 11 are closed, first terminal 131 and second terminal 132 are linked together with first wire 41 and second wire 42 respectively, upper cover 12 is equipped with through-hole 14.
The opening of the through hole 14 on the upper surface of the upper cover 12 is a first circle, the opening of the through hole 14 on the lower surface of the upper cover 12 is a second circle, and the connecting line between the centers of the first circle and the second circle is an arc line.
The power supply wire 4 is provided with a groove 112 below the part between the first terminal 131 and the second terminal 132 and connected with the first power supply 3
The working procedure of this example:
after the SRAM2 chip is mounted on the base 11 of the case 1, the first terminal 131 and the second terminal 132 are connected to the first wire 41 and the second wire 42 by soldering, respectively, and the case top 12 is fixedly connected to the base 11. Through the through-hole 14, the portion of the power supply wire 4 is cut down the through-hole 14 by a rod-shaped tool, and the through-hole 14 is blocked with solder.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (1)
1. The utility model provides a nonvolatile SRAM data encryption device, includes casing, SRAM, power supply wire and first power set up inside the casing, and first power is the SRAM power supply through the power supply wire, the power supply wire includes the first wire that links to each other with first power anodal and the second wire that links to each other with first power negative pole, its characterized in that: the shell comprises a base and an upper cover, a second power supply is arranged at the upper cover, the second power supply comprises a first terminal and a second terminal which are respectively connected with the positive electrode and the negative electrode of the second power supply, the first terminal and the second terminal are respectively communicated with a first wire and a second wire when the upper cover is closed with the base, the upper cover is provided with a through hole, an opening on the upper surface of the upper cover is a first circle, an opening on the lower surface of the upper cover is a second circle, a connecting line between circle centers of the first circle and the second circle is an arc line, the horizontal distance between the circle centers of the first circle and the second circle is larger than the diameter of the first circle or the second circle, and a groove is arranged below the part, which is positioned between the first terminal and the second terminal and is connected with the first power supply, of the power supply wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811586212.7A CN109446849B (en) | 2018-12-25 | 2018-12-25 | Nonvolatile SRAM data encryption device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811586212.7A CN109446849B (en) | 2018-12-25 | 2018-12-25 | Nonvolatile SRAM data encryption device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109446849A CN109446849A (en) | 2019-03-08 |
| CN109446849B true CN109446849B (en) | 2023-05-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811586212.7A Active CN109446849B (en) | 2018-12-25 | 2018-12-25 | Nonvolatile SRAM data encryption device |
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| Country | Link |
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| CN (1) | CN109446849B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111639370B (en) * | 2020-06-11 | 2021-08-03 | 威海银创微电子技术有限公司 | Nonvolatile SRAM data encryption device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357371A (en) * | 2000-06-13 | 2001-12-26 | Sony Corp | Hardware token with fingerprint collating function |
| CN1828558A (en) * | 2005-03-04 | 2006-09-06 | 中国科学院计算技术研究所 | Encrypt device and method for static RAM programmable gate array chip |
| CN1963832A (en) * | 2006-12-07 | 2007-05-16 | 上海普芯达电子有限公司 | Data processing apparatus capable of preventing inbreak and embedded system |
| CN102360411A (en) * | 2011-10-17 | 2012-02-22 | 三一重工股份有限公司 | Uncovering locking method and device and communication device |
| CN202513599U (en) * | 2011-12-30 | 2012-10-31 | 珠海艾派克微电子有限公司 | Charging circuit, memory chip and consumable container |
| CN106933752A (en) * | 2017-03-09 | 2017-07-07 | 西安电子科技大学 | The encryption device and method of a kind of SRAM type FPGA |
-
2018
- 2018-12-25 CN CN201811586212.7A patent/CN109446849B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001357371A (en) * | 2000-06-13 | 2001-12-26 | Sony Corp | Hardware token with fingerprint collating function |
| CN1828558A (en) * | 2005-03-04 | 2006-09-06 | 中国科学院计算技术研究所 | Encrypt device and method for static RAM programmable gate array chip |
| CN1963832A (en) * | 2006-12-07 | 2007-05-16 | 上海普芯达电子有限公司 | Data processing apparatus capable of preventing inbreak and embedded system |
| CN102360411A (en) * | 2011-10-17 | 2012-02-22 | 三一重工股份有限公司 | Uncovering locking method and device and communication device |
| CN202513599U (en) * | 2011-12-30 | 2012-10-31 | 珠海艾派克微电子有限公司 | Charging circuit, memory chip and consumable container |
| CN106933752A (en) * | 2017-03-09 | 2017-07-07 | 西安电子科技大学 | The encryption device and method of a kind of SRAM type FPGA |
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| Publication number | Publication date |
|---|---|
| CN109446849A (en) | 2019-03-08 |
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| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Non volatile SRAM data encryption device Effective date of registration: 20230726 Granted publication date: 20230512 Pledgee: Postal Savings Bank of China Limited Weihai Branch Pledgor: WEIHAI SICICS MICROELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2023980049878 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20230512 Pledgee: Postal Savings Bank of China Limited Weihai Branch Pledgor: WEIHAI SICICS MICROELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2023980049878 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: Non volatile SRAM data encryption device Granted publication date: 20230512 Pledgee: Postal Savings Bank of China Limited Weihai Branch Pledgor: WEIHAI SICICS MICROELECTRONIC TECHNOLOGY Co.,Ltd. Registration number: Y2024980004032 |