CN106127092A - The smart card of a kind of COS system application stripping and method of work thereof - Google Patents
The smart card of a kind of COS system application stripping and method of work thereof Download PDFInfo
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- CN106127092A CN106127092A CN201610432049.3A CN201610432049A CN106127092A CN 106127092 A CN106127092 A CN 106127092A CN 201610432049 A CN201610432049 A CN 201610432049A CN 106127092 A CN106127092 A CN 106127092A
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
- G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
- G06K19/067—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components
- G06K19/07—Record carriers with conductive marks, printed circuits or semiconductor circuit elements, e.g. credit or identity cards also with resonating or responding marks without active components with integrated circuit chips
- G06K19/077—Constructional details, e.g. mounting of circuits in the carrier
- G06K19/07701—Constructional details, e.g. mounting of circuits in the carrier the record carrier comprising an interface suitable for human interaction
Abstract
The invention provides smart card and method of work thereof that the application of a kind of COS system is peeled off.Described smart card includes chip, COS system, shared variable storehouse, customized application module.Application management module closely-related with user's customized demand in traditional COS system is divided into application interface and customized application two parts by the present invention, application interface belongs to COS system, by chip production, business develops, and customized application is independent of COS system, and user can self-developing according to demand.The COS system designed according to the present invention, independent of application function, only comprises application interface, facing multiple users, not only increases safety, and can reduce exploitation and test job amount, reduce development difficulty, improve development efficiency；Support the download online of application, renewal, it is simple to the application function in smart card later stage updates, it is possible to decrease maintenance cost.
Description
Technical field
The present invention relates to embedded SOC(System On Chip) field, particularly relate to what the application of a kind of COS system was peeled off
Smart card and method of work thereof.
Background technology
Smart card is made up of hardware resource (chip) and Chip Operating System COS.
Chip is mainly by CPU processor, memory element (including random access memory, electricity erasable memorizer), peripheral circuit
Composition.
COS system is the core of smart card, is embedded in chip, managing chip hardware resource, the safe place of execution data
Reason and access, and the monitoring software system communicated with external device by peripheral interface.
Traditional smart card COS system structure generally includes main system control module, hardware resource management module, telecommunication management
Several parts such as module, safety management module, file system management module and application management module, as shown in Figure 1.System master
Module is the core of COS, region be directly facing hardware resource, is uniformly coordinated the operating of each module；Safety management module is to transmission and storage
Data be encrypted, authority differentiate, it is ensured that the safety of smart card；File system management module management is with document form storage
Data, have been responsible for the operations such as the lookup to file, read-write, and have been managed memory space；Application management module is to outside
The various instructions sent into carry out judging, resolve and processing, and scheduling internal resource is in order to complete the corresponding of user's customized application function
Operation.
For to smart card low-power consumption, the consideration of cost needs, should save as far as possible take memory resource, COS system
The configuration of code, system and file system are then stored in electricity erasable memorizer because needing power down to preserve, and needed for COS system is run
The overall situation, static variable and stacked data are then stored in random access memory because of variable and processing speed height, COS system program run from
Electricity erasable memorizer reads instruction and read-only data, reads and writes data from random access memory, as shown in Figure 2.
Traditional smart card COS system is developed for certain chip and customized application, generally complete by chip production business
Become exploitation, because only that they the most really understand the ins and outs of chip bottom.Many users, every user is had with a chip
Application scenarios different, it is meant that every money chip needs multiple COS systems soft wares could meet multi-user's demand.Chip production business
Need to customize special COS system for every user, owing to chip production business developer is general lack of application-specific scene
Technological reserve, development difficulty increases, time span is long, and each customization COS system is required for substantial amounts of test, so greatly reduces
The efficiency of exploitation, and traditional COS system do not supports that application function is independently updated, later maintenance cost increases.
Summary of the invention
For solving the problems referred to above, the invention provides the smart card that the application of a kind of COS system is peeled off, described smart card includes
Chip, COS system, shared variable storehouse, customized application module；
Described chip is made up of CPU, memory module, peripheral circuit.Memory module is divided into code storage unit and variable storage list
Unit, described code storage unit is divided into COS system code district, system configuration code district, application code district；Described variable storage list
Unit is divided into shared variable district, COS system global variables district, application system global variable district, shares stack area.
Described COS system includes main system control module, hardware resource management module, communication management module, safety management mould
Block, AIM；Described COS system exchanges with extraneous order for controlling smart card, resource in management smart card, for
User provide call COS system internal resources application interface library；AIM is mainly by application interface library and application
Interface management unit forms, and described application interface library includes multiple application interface function；Application interface administrative unit is application journey
Sequence provide download, more new tunnel, carry out the registration of application program, for application program configuration operation environment, and manage user should
With the transmission of data.
Shared variable storehouse is the set sharing global variable, hands over for realizing the data of COS system and customized application module
Mutually, and data buffer storage is provided；Described shared variable stock is stored in shared variable district.
Customized application module is made up of applied environment dispensing unit, application log-on message unit and application function unit；Should
It is used for carrying out application interface function initialization with environment configurations unit, to call COS system internal resources；Application log-on message list
Unit's information needed for providing application program to run for COS system；Application function unit is joined for providing an applied environment
Put function entrance address, to realize the temporary transient transfer to application program of the CPU pointer control.
Further, application interface library includes that memorizer manages class built-in function, logical operations class built-in function, safety management class
Built-in function, system operation class built-in function and file system operation class built-in function；Memorizer management class built-in function is used for storing
The reading of space correlation, write, wipe, compare operation；Logical operations class built-in function be used for carrying out logical AND, logic or, XOR,
From XOR and logical operation；Safety management class built-in function is used for providing safety-related interface function；System operation class libraries letter
Number is for providing system generic operation function interface for user application；File system operation class built-in function provides for application program
File manipulation function.
Further, the information in application log-on message unit includes the initial address of application program text section, application journey
The end address of sequence text section, the initial address of application program data section, the end address of application program data section, application program
The initial address of bss section, the end address of application program bss section, application initial configuration function entrance address, application function letter
Number entry address.
Further, code storage unit is to use electricity erasable memorizer to store, and variable storage unit is to use
Random access memory stores.
Further, regulation during shared global variable includes ISO/IEC 7816-3 and ISO/IEC 7816-4 agreement
Five command header variablees of APDU, data cached, the random number of caching of read-write equipment.
The workflow of above-mentioned COS system includes downloading and update application work flow process, application workflow.
Described download and renewal application work flow process comprise the steps:
Step one: COS system is run, waits the order of exterior read-write equipment, when detecting that order is to update application code,
COS system performs the download of application program, renewal.
Step 2: application program download, has updated after, COS system detect application program whether register, such as application program
Registration, then do not jump to step 4, as application program has been registered, then perform step 3.
Step 3: COS system is that application program runs configuration surroundings: read original position in application code district text section
Log-on message, the original position of data section and end position, applied environment configuration function entry address, and move the number of data section
According to application global variable district, last COS system jumps to applied environment configuration function entry address, by the PC pointer of CPU
Control hands to application program, and application execution environment configures.
Step 4: perform COS base command, it is judged that this base command is the need of downloading and/or more new opplication, as otherwise
Power cut-off flow process, the most then download and/or update application program.
Step 5: return, power cut-off flow process.
Described application workflow comprises the steps:
Step one: smart card powers on, waits the reset instruction of read-write equipment to be received, answers as received then to send to reset to read-write equipment
Answer and perform step 2.
Step 2: whether the detection application of COS system registers, and application is registered if detecting, COS system is application configuration fortune
Row environment, and carry out step 3, as do not registered, COS system can process base instruction, carries out step 4.
Step 3: COS system is standby, waits the order from card-reading apparatus to be received.Order is divided into basis to refer to
Make process and application process, based on order during instruction, perform step 4；When order processes for application, perform step 5.
Step 4: COS system obtains the control of CPU pointer, reads instruction, from COS system from COS system code district
Global variable district access data, complete command process, and perform step 6.
Step 5: the control of CPU pointer is given application program by COS system, the pointer of application program controlling CPU is from answering
Reading instruction with code area, access data from the global variable district of application, complete the process of application function, application program will process
Result feeds back to COS system by shared variable district, and gives back the control of CPU pointer, and performs step 6.
Step 6: COS system returns result to read-write equipment, makes mistakes if processed, and performs step 7, otherwise returns
Step 3.
Step 7: COS system exception, COS system no longer responds the command request of read-write equipment, and read-write equipment now can enter
Row system reset, recovers COS system, and this flow process terminates.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of tradition COS system structure.
Fig. 2 is tradition COS system memory space distribution schematic diagram.
Fig. 3 is the COS system memory space distribution schematic diagram of the present invention.
Fig. 4 is COS system and the schematic diagram of application lift-off structure of the present invention.
Fig. 5 is COS system function and the variable mappings mode schematic diagram of the present invention.
Detailed description of the invention
In order to improve the versatility of smart card COS system, motility and development efficiency, the design concept of the present invention is: will
Traditional COS system is divided into application interface and customized application two parts, and application interface belongs to COS system, and by chip production, business enters
Row exploitation, customized application is independent of COS system, and user can self-developing according to demand.
Below technical scheme is described in detail.
Described chip is made up of hardware and software.
Described hardware includes that CPU processor, memory module, peripheral circuit form.
As it is shown on figure 3, memory module is the memory space of smart card, it is divided into code storage unit and variable storage list
Unit.For reducing the resource occupation of smart card random access memory as far as possible, COS system specifies the division in smart cards for storage space, determines
Calling the mode of each module of customized application, memory module is divided into code storage unit and variable storage unit.Code storage unit
Being to use electricity erasable memorizer to store, variable storage unit is to use random access memory to store.Described code is deposited
Storage unit storage executable file, including code (text section), initialized global variable (data section) and no initializtion is complete
Office's variable (bss section).
Described random access memory is only used for the access of variable.Code storage unit is divided into COS system code district, system configuration
District and application code district.
Variable storage space is divided into shared variable district, COS system global variables district, application system global variable district, shares
Stack area.
Below in conjunction with Fig. 4, software is introduced.
1.COS system
COS system facing multiple users demand, mainly by main system control module, hardware resource management module, communication management module, peace
Entirely manage a few part such as module, AIM to constitute.AIM is mainly by application interface library and application interface pipe
Reason unit composition.
COS system is used for providing a user with application interface library so that user, without closing chip centroid bottom layer driving details, passes through
Application interface calls COS internal resource, can effectively control the physical resource on smart card, complete opening of application specific functionality
Send out.
Application interface library mainly has following a few class function: memorizer manages class built-in function, logical operations class built-in function, safety
Management class built-in function, system operation class built-in function, file system operation class built-in function.Wherein, memorizer management class built-in function enters
Reading that row memory space is relevant, write, wipe, the operation such as compare；Logical operations class built-in function carries out common logical operation,
Including logical AND, logic or, XOR, from XOR and etc. operation；Safety management class built-in function provides safety-related interface letter
Number, such as signature, certification, encrypts and deciphering etc.；System operation class built-in function provides system generic operation function for user application
Interface, including random number reading, internal system certification, its exterior certification, the amendment of smart card baud rate, power down protection etc.；Literary composition
Part system operation class built-in function provides file manipulation function for user application, can locating file, reading file content, amendment
File content, deleting file data etc..
Application interface administrative unit provides download, more new tunnel for application program, carries out the registration of application program, for application
The program good running environment of configuration, and manage user and apply the transmission of data.Specifically, i.e. application interface manages module
There is application program download management function, for managing the download online of application program, updating and register.On smart cards at the beginning of electricity
Beginning, whether application interface management module detection application program is registered, as registered in application detected, just according to application registration
Information carries out moving of the data of application program, and calling applied environment configuration function is that the properly functioning of application function gets out thing
Reason environment.The transmission of application interface management module management application data, receives read-write equipment order, carries out applying data safety
Property, legitimacy detection, filter out application function data content delivery give application, and by application process after data to read-write equipment
Loopback.Application interface management module, as COS system and the bridge of customized application, makes COS system and applies separate becoming
May, add the safety of COS system.
2. shared variable storehouse
Shared variable storehouse provides the passage of data interaction for COS system and customized application, is the set sharing global variable, including
The APDU(Application Protocol Data of regulation in ISO/IEC 7816-3 and ISO/IEC 7816-4 agreement
The data buffer storage of five command header variablees Unit), read-write equipment transmission, random number caching etc..Shared variable stock is stored in and deposits
The shared variable district of storage module.
3. customized application module
Customized application module, towards unique subscriber, has specificity.Customized application module mainly by applied environment dispensing unit, should
Constitute with log-on message unit and application function unit.
Applied environment dispensing unit is for carrying out the initialization of application interface library inner function, it is simple to call in application function
COS system internal resources.
Application log-on message unit is towards COS system, and its contained application log-on message provides for COS system should
Information needed for running by program, including the initial address of application program text section, the end address of application program text section, should
With the initial address of program data section, the end address of application program data section, the initial address of application program bss section, application
The end address of program bss section, application initial configuration function entrance address and application function function entrance address etc..These ground
Location information can obtain by being inserted into tag addresses variable in text, data and bss section of the threaded file of translation and compiling environment.
Application function unit is for the realization of user's customized application function, and for COS system, application function is one
Applied environment configuration function entry address, COS system completes CPU pointer by accessing applied environment configuration function entry address
Control is to the temporary transient transfer of application program.
In the present invention, COS system and customized application are separate on memory space, and on the time, order performs, by altogether
Enjoy variable range and carry out data interaction (as shown in Figure 3), by shared stack space storage function (what function please be demonstrate)
Parameter value, local variable etc..
Fig. 5 show COS system and accesses customized application function, variable or customized application access COS system application interface letter
The schematic diagram of number.The operation program of COS system code district storage COS system, the application interface built-in function running program is linked
Starting in continuous print memory space to the initial address being positioned at COS system code district, each application interface function correspondence one is solid
Fixed entry address, customized application can be fixed into port address indirect addressing by this, access application interface function, reaches to operate intelligence
The purpose of energy card bottom physical resource.Application code district storage application program, the effective address information in application program and function
Entry address according to the prescribed form of COS system by the initial address being sequentially linked to be positioned at application code district start continuous
In memory space, the corresponding fixing entry address of each application interface function, the corresponding fixing access of each variable
Address, function access passes through indirect addressing mode, and variables access passes through direct addressin.Storage shared variable storehouse, shared variable district
Program, this application definition as COS system and the variable of customized application data exchange channels, array and pointer etc., is shared and is become
Each member in amount storehouse is linked to the initial address in shared variable district and starts in continuous print memory space.
The COS system using the method for the embodiment of the present invention to design can be supported to apply download online and renewal.COS system
Being cured to the COS code area of electric erasable memory block, COS system is run, and smart card can normally work, and processes elementary instruction, complete
Become assigned operation, the most do not support customized application function.The executable file that customized application compiling is formed, passes through intelligent card interface
Download online is to application code district, and completes registration and the running environment configuration of customized application.
Below the workflow of above-mentioned smart card is illustrated.
COS system downloads and renewal application work flow chart comprise the steps:
Step one: COS system is run, waits the order of exterior read-write equipment, when detecting that order is to update application code,
COS system performs the download of application program, renewal.
Step 2: application program download, has updated after, COS system detect application program whether register, such as application program
Registration, then do not jump to step 4, as application program has been registered, then perform step 3.
Step 3: COS system is that application program runs configuration surroundings.First, initiate in reading application code district text section
The log-on message of position: the original position of data section and end position, applied environment configuration function entry address.Secondly, move
The data of data section are to application global variable district, owing to the data section in application code district comprises the global variable after initialization,
The chained address of data section will be arrived application global variable district for application global variable district, i.e. CPU and read at the beginning of application global variable
Initial value, therefore the size of data of data section need to be calculated, perform the data-moving operation of data section.Finally, COS system jumps to answer
With environment configurations function entrance address, the control of the PC pointer of smart card CPU being handed to application program, application program performs
Environment configurations, mainly includes the functions such as clock environment configuration, application interface function registration and intelligent card interface baud rate configuration.
Step 4: perform COS base command, it is judged that this base command is the need of downloading and/or more new opplication, as otherwise
Power cut-off flow process, the most then download and/or update application program.
Step 5: return, power cut-off flow process.
The workflow of COS system comprises the steps:
Step one: smart card powers on, waits the reset instruction of read-write equipment to be received, answers as received then to send to reset to read-write equipment
Answer and perform step 2.
Step 2: whether the detection application of COS system registers, and application is registered if detecting, COS system is application configuration fortune
Row environment, and carry out step 3, as do not registered, COS system can process base instruction, carries out step 4.
Step 3: COS system is standby, waits the order from card-reading apparatus to be received.Order is divided into basis to refer to
Make process and application process, based on order during instruction, perform step 4；When order processes for application, perform step 5.
Step 4: COS system obtains the control of CPU pointer, reads instruction, from COS system from COS system code district
Global variable district access data, complete command process, and perform step 6.
Step 5: the control of CPU pointer is given application program by COS system, the pointer of application program controlling CPU is from answering
Reading instruction with code area, access data from the global variable district of application, complete the process of application function, application program will process
Result feeds back to COS system by shared variable district, and gives back the control of CPU pointer, and performs step 6.
Step 6: COS system returns result to read-write equipment, makes mistakes if processed, and performs step 7, otherwise returns
Step 3.
Step 7: COS system exception, COS system no longer responds the command request of read-write equipment, and read-write equipment now can enter
Row system reset, recovers COS system, and this flow process terminates.
The invention have the benefit that
Tradition COS system is functionally made a distinction by the present invention, and then structurally carries out separate design, specific depending on
The application of user's request is peeled off from tradition COS system.The COS system that the COS system of the present invention is more traditional has more logical
With property and motility.Traditional COS system need to carry out exploitation and the maintenance of multiple COS system according to different user demands, exploitation
Working strength is big, difficulty is high, and later maintenance cost is high.Use the COS system that the method for the present invention is designed independent of application
Function, facing multiple users, there is versatility, exploitation and test job amount can be reduced, reduce development difficulty, raising development efficiency；
And support the download online of application, renewal, it is simple to the application function in smart card later stage updates, it is possible to decrease maintenance cost.
Claims (6)
1. the smart card that a COS system application is peeled off, it is characterised in that described smart card includes chip, COS system, shares
Base variable, customized application module；
Described chip is made up of CPU, memory module, peripheral circuit；Memory module is divided into code storage unit and variable storage list
Unit, described code storage unit is divided into COS system code district, system configuration code district, application code district；Described variable storage list
Unit is divided into shared variable district, COS system global variables district, application system global variable district, shares stack area；
Described COS system includes main system control module, hardware resource management module, communication management module, safety management module, answers
Use interface module；Described COS system exchanges with extraneous order for controlling smart card, and resource in management smart card, for user
There is provided call COS system internal resources application interface library；AIM is managed by application interface library and application interface
Unit forms, and described application interface library includes multiple application interface function；Under application interface administrative unit provides for application program
Carry, more new tunnel, carry out the registration of application program, for application program configuration operation environment, and manage user and apply data
Transmission；
Shared variable storehouse is the set sharing global variable, for realizing COS system and the data interaction of customized application module, and
Data buffer storage is provided；Described shared variable stock is stored in shared variable district；
Customized application module is made up of applied environment dispensing unit, application log-on message unit and application function unit；Application ring
Border dispensing unit is used for carrying out application interface function initialization, to call COS system internal resources；Application log-on message unit is used
Information needed for providing application program to run for COS system；Application function unit is for providing an applied environment configuration letter
Number entry address, to realize the temporary transient transfer to application program of the CPU pointer control.
2. the smart card that COS system application as claimed in claim 1 is peeled off, it is characterised in that application interface library includes storage
Device management class built-in function, logical operations class built-in function, safety management class built-in function, system operation class built-in function and file system behaviour
Make class built-in function；Memorizer management class built-in function is for carrying out the relevant reading of memory space, writing, wipe, compare operation；Patrol
Volume computing class built-in function for carry out logical AND, logic or, XOR, from XOR and logical operation；Safety management class built-in function
For providing safety-related interface function；System operation class built-in function is for providing system generic operation letter for user application
Number interface；File system operation class built-in function provides file manipulation function for application program.
3. the smart card that COS system application as claimed in claim 1 is peeled off, it is characterised in that in application log-on message unit
Information include the initial address of application program text section, the end address of application program text section, application program data section
Initial address, the end address of application program data section, the initial address of application program bss section, the end of application program bss section
Address, application initial configuration function entrance address, application function function entrance address.
4. the smart card that COS system application as claimed in claim 1 is peeled off, it is characterised in that code storage unit is to use
Electricity erasable memorizer stores, and variable storage unit is to use random access memory to store.
5. the smart card that COS system application as claimed in claim 1 is peeled off, it is characterised in that shared global variable includes
Five command header variablees of APDU of regulation, the caching of read-write equipment in ISO/IEC 7816-3 and ISO/IEC7816-4 agreement
Data, the random number of caching.
6. the workflow of the smart card that the COS system application as described in any one of claim 1 ~ 5 is peeled off, it is characterised in that
Described workflow includes downloading and update application work flow process, application workflow；
Described download and renewal application work flow process comprise the steps:
Step one: COS system is run, waits the order of exterior read-write equipment, when detecting that order is to update application code,
COS system performs the download of application program, renewal；
Step 2: application program download, has updated after, COS system detect application program whether register, as application program does not has
Registration, then jump to step 4, as application program has been registered, then perform step 3；
Step 3: COS system is application program operation configuration surroundings: the registration of original position in reading application code district text section
Information, the original position of data section and end position, applied environment configuration function entry address, and the data moving data section arrive
Application global variable district, last COS system jumps to applied environment configuration function entry address, by the control of the PC pointer of CPU
Power hands to application program, and application execution environment configures；
Step 4: perform COS base command, it is judged that this base command is the need of downloading and/or more new opplication, as otherwise terminated
Workflow, the most then download and/or update application program；
Step 5: return, power cut-off flow process；
Described application workflow comprises the steps:
Step one: smart card powers on, waits the reset instruction of read-write equipment to be received, answers as received then to send to reset to read-write equipment
Answer and perform step 2.
Step 2: whether the detection application of COS system registers, and application is registered if detecting, COS system is that application configuration runs ring
Border, and carry out step 3, as do not registered, COS system can process base instruction, carries out step 4.
Step 3: COS system is standby, waits the order from card-reading apparatus to be received.Order is divided at base instruction
Reason and application process, and based on order during instruction, perform step 4；When order processes for application, perform step 5.
Step 4: COS system obtains the control of CPU pointer, reads instruction, from the COS system overall situation from COS system code district
Variable range access data, complete command process, and perform step 6.
Step 5: the control of CPU pointer is given application program by COS system, the pointer of application program controlling CPU is from application generation
Code district reads instruction, accesses data from the global variable district of application, completes the process of application function, and application program is by result
Feed back to COS system by shared variable district, and give back the control of CPU pointer, and perform step 6.
Step 6: COS system returns result to read-write equipment, makes mistakes if processed, and performs step 7, otherwise returns step
Three.
Step 7: COS system exception, COS system no longer responds the command request of read-write equipment, and read-write equipment can be now
System resets, and recovers COS system, and this flow process terminates.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107798256A (en) * | 2017-11-21 | 2018-03-13 | 成都三零嘉微电子有限公司 | A kind of smart card and design method based on cryptographic algorithm separation storage |
| CN109032960A (en) * | 2018-06-29 | 2018-12-18 | 北京中电华大电子设计有限责任公司 | A kind of dynamic allocation method and data structure of smart card RAM |
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