CN106991342A - A kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens - Google Patents
A kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens Download PDFInfo
- Publication number
- CN106991342A CN106991342A CN201710166894.5A CN201710166894A CN106991342A CN 106991342 A CN106991342 A CN 106991342A CN 201710166894 A CN201710166894 A CN 201710166894A CN 106991342 A CN106991342 A CN 106991342A
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- China
- Prior art keywords
- liquid crystal
- fresnel lens
- input
- cpu
- key
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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
- G06F21/82—Protecting input, output or interconnection devices
- G06F21/83—Protecting input, output or interconnection devices input devices, e.g. keyboards, mice or controllers thereof
-
- G—PHYSICS
- G07—CHECKING-DEVICES
- G07F—COIN-FREED OR LIKE APPARATUS
- G07F19/00—Complete banking systems; Coded card-freed arrangements adapted for dispensing or receiving monies or the like and posting such transactions to existing accounts, e.g. automatic teller machines
- G07F19/20—Automatic teller machines [ATMs]
- G07F19/205—Housing aspects of ATMs
- G07F19/2055—Anti-skimming aspects at ATMs
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- Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Software Systems (AREA)
- General Engineering & Computer Science (AREA)
- Business, Economics & Management (AREA)
- Accounting & Taxation (AREA)
- Finance (AREA)
- Input From Keyboards Or The Like (AREA)
Abstract
The invention discloses a kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens, mainly by camera, CPU, liquid crystal Fresnel lens and semicircle touch-control input keyboard are constituted, wherein CPU by circuit respectively with camera, liquid crystal Fresnel lens and semicircle touch-control input keyboard connection, camera is used for the positional information for the person that gathers Password Input and transmits the positional information to CPU, CPU is used for the Password Input region that control liquid crystal Fresnel lens form its refraction after the positional information of Password Input person is obtained and is in the visual line of sight of position importer.The equipment is set up on the basis of existing password input equipment can improve the security that people use, production cost is relatively low, operation method is simple, with general applicability, and avoid need to be blocked when current technology people use keyboard presence inconvenient factor, with very high practicality, the Password Input safety problem become increasingly conspicuous is largely solved.
Description
Technical field
The invention belongs to protecting information safety equipment technical field, and in particular to it is a kind of based on liquid crystal Fresnel lens can
Depending on scope limit for cryptographic input equipment.
Background technology
With continuing to develop for social and economic activities, automatic teller machine is increasingly popularized, swipe the card etc. payment method by
Gradually substitution cash is paid a bill, and does not have good safeguard procedures, keyboard to fix due to traditional keyboard-type cipher input equipment, can
Depending on the factor such as scope is wider, offender can directly spy on or obtain user's encrypted message by imaging first-class tool used in crime,
User may directly be obtained the password of input or obtain encrypted message, therefore password quilt by button orientation during snoop operations
Peep that the phenomenon stolen is too numerous to enumerate, the safety issue of Password Input becomes increasingly conspicuous, the improvement of the safeguard protection of Password Input
It is imperative.
The content of the invention
It is an object of the invention to provide a kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens,
It is that new keyboard deployment and visual field diminution is carried out on the basis of current touch-control cipher input equipment, password position is solved with this
The problem of fixed and code keypad visual range is wider, efficiently solves the safety issue during Password Input.
It is of the invention to adopt the following technical scheme that to achieve the above object, a kind of visual range based on liquid crystal Fresnel lens
Limit for cryptographic input equipment, it is characterised in that main by camera, CPU, liquid crystal Fresnel lens and semicircle touch-control enter key
Disk is constituted, and wherein CPU inputs keyboard with camera, liquid crystal Fresnel lens and semicircle touch-control respectively by circuit and is connected, and takes the photograph
It is used for the positional information for the person that gathers Password Input as head and transmits the positional information to CPU, CPU is used to obtain Password Input
The Password Input region that liquid crystal Fresnel lens are controlled after the positional information of person forms its refraction is in regarding for position importer
In the range of line, and CPU is additionally operable to control the internal circuit of semicircle touch-control input keyboard, and liquid crystal Fresnel lens are arranged at half
Circular touch inputs the top of keyboard, and for reducing the original visual range in Password Input region, semicircle touch-control inputs keyboard
Panel is provided with " 0-9 " numerical key, " confirmation " key, " deletion " key and " out of order " key, and when opening the device, numeral is arranged in order,
To prevent other people from obtaining encrypted message according to key position, out of order key can be pressed and change array order at random, it is then correct defeated
Enter password, input numeral can be deleted when inputting wrong by delete key and then re-entered, confirmed after input password by acknowledgement key, nothing
People will restPose automatically when operating.
The present invention has the advantages that compared with prior art：The present invention can be applied to automatic teller machine or one
In the cipher input equipment of a little public occasions, device password show can arranged in sequence also out of order arrangement have it is very strong flexible
Property, it is applicable age bracket extensively, the equipment is set up on the basis of existing password input equipment can improve the safety that people use
Property, production cost is relatively low, and operation method is simple, with general applicability, and avoids when current technology people use and need to block
The inconvenient factor that keyboard is present, with very high practicality, largely solves the Password Input safety become increasingly conspicuous
Problem, while providing certain technical guarantee for the safe to use of people, the life given people brings facility.
Brief description of the drawings
Fig. 1 is the structural representation of semicircle touch-control input keyboard in the present invention；
Fig. 2 is the principle schematic of the present invention；
Fig. 3 is the module connection figure of the present invention；
Fig. 4 is the human eye field of view figure during use of the present invention.
Embodiment
The particular content of the present invention is described in detail with reference to accompanying drawing.A kind of visual range limitation based on liquid crystal Fresnel lens
Cipher input equipment, is mainly made up of, wherein CPU camera, CPU, liquid crystal Fresnel lens and semicircle touch-control input keyboard
Keyboard is inputted by circuit with camera, liquid crystal Fresnel lens and semicircle touch-control respectively to be connected, camera is used to gather close
The positional information of code importer simultaneously transmits the positional information to CPU, and CPU is for after the positional information of Password Input person is obtained
The Password Input region that control liquid crystal Fresnel lens form its refraction is in the visual line of sight of position importer, and
CPU is additionally operable to the internal circuit for controlling semicircle touch-control to input keyboard, and liquid crystal Fresnel lens are arranged at semicircle touch-control input
The top of keyboard, for reducing the original visual range in Password Input region, semicircle touch-control input key panel is provided with " 0-
9 " numerical keys, " confirmation " key, " deletion " key and " out of order " key, when opening the device, numeral is arranged in order, to prevent other people roots
Encrypted message is obtained according to key position, out of order key can be pressed and change array order at random, password is then correctly entered, input has
Mistake to delete by delete key and input digital and then re-enter, will be certainly when unattended by acknowledgement key confirmation after input password
It is dynamic to restPose.
The present invention operation principle and process be：People's eyes horizontal direction wide viewing angle angle is up to 188 °, and eyes overlap area
The width angle in domain is 124 °, and the best region of human eye viewing is the overlapping region i.e. M regions of eyes zone of comfort, when camera is adopted
Collect after user's information, the visual range of user can be obtained by CPU processing informations, then drive liquid crystal Fresnel lens to make
The image information of liquid crystal Fresnel lens refraction is imported in user's eye, because liquid crystal Fresnel lens can be by the refraction of light
Change the visual range in Password Input region, after refraction of the Password Input region by liquid crystal Fresnel lens, Password Input
Area's visual range is reduced, and nothing in Password Input region display information, other scopes of surrounding is only apparent that near human eye
Method is directly spied on by peeping device or people and obtains Password Input region display information, is stolen so as to be greatly reduced password
Possibility.
Have been shown and described above the general principle of the present invention, principal character and advantage, do not depart from spirit of the invention and
On the premise of scope, the present invention also has various changes and modifications, and these changes and improvements both fall within claimed invention
Scope.
Claims (1)
1. a kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens, it is characterised in that mainly by imaging
Head, CPU, liquid crystal Fresnel lens and semicircle touch-control input keyboard are constituted, wherein CPU by circuit respectively with camera, liquid
Brilliant Fresnel Lenses and the input keyboard connection of semicircle touch-control, camera are used to gathering Password Input the positional information of person and should
Positional information is transmitted to CPU, and CPU, which is used for the control liquid crystal Fresnel lens after the positional information of Password Input person is obtained, rolls over it
The Password Input region to be formed is penetrated to be in the visual line of sight of position importer, and CPU is additionally operable to control semicircle touch-control defeated
Enter the internal circuit of keyboard, liquid crystal Fresnel lens are arranged at the top that semicircle touch-control inputs keyboard, defeated for reducing password
Enter the original visual range in region, semicircle touch-control input key panel is provided with " 0-9 " numerical key, " confirmation " key, " deletion "
Key and " out of order " key, when opening the device, numeral is arranged in order, can to prevent other people from obtaining encrypted message according to key position
Press out of order key and change array order at random, then correctly enter password, input number can be deleted when inputting wrong by delete key
Then word re-enters, and confirms after input password by acknowledgement key, will be restPosed automatically when unattended.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710166894.5A CN106991342A (en) | 2017-03-20 | 2017-03-20 | A kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710166894.5A CN106991342A (en) | 2017-03-20 | 2017-03-20 | A kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106991342A true CN106991342A (en) | 2017-07-28 |
Family
ID=59412174
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710166894.5A Pending CN106991342A (en) | 2017-03-20 | 2017-03-20 | A kind of visual range limit for cryptographic input equipment based on liquid crystal Fresnel lens |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106991342A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05342451A (en) * | 1992-06-11 | 1993-12-24 | Fujitsu Ltd | Automatic teller machine |
| CN1831727A (en) * | 2005-03-09 | 2006-09-13 | 上海新虹伟信息技术有限公司 | Disordered keyboard with visual-angle limit for cryptographic input |
| CN101044519A (en) * | 2004-10-22 | 2007-09-26 | 安访方案有限公司 | Keypad security device |
| CN103167113A (en) * | 2012-05-08 | 2013-06-19 | 深圳市金立通信设备有限公司 | Anti-peep system and method for automatically adjusting backlight angle of display screen based on angle of human eyes and screen |
| CN103728748A (en) * | 2012-10-16 | 2014-04-16 | 联想移动通信科技有限公司 | Adjusting method of visual angle of liquid crystal display, liquid crystal display and terminal |
-
2017
- 2017-03-20 CN CN201710166894.5A patent/CN106991342A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH05342451A (en) * | 1992-06-11 | 1993-12-24 | Fujitsu Ltd | Automatic teller machine |
| CN101044519A (en) * | 2004-10-22 | 2007-09-26 | 安访方案有限公司 | Keypad security device |
| CN1831727A (en) * | 2005-03-09 | 2006-09-13 | 上海新虹伟信息技术有限公司 | Disordered keyboard with visual-angle limit for cryptographic input |
| CN103167113A (en) * | 2012-05-08 | 2013-06-19 | 深圳市金立通信设备有限公司 | Anti-peep system and method for automatically adjusting backlight angle of display screen based on angle of human eyes and screen |
| CN103728748A (en) * | 2012-10-16 | 2014-04-16 | 联想移动通信科技有限公司 | Adjusting method of visual angle of liquid crystal display, liquid crystal display and terminal |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170728 |