CN101566975B - Method for communication with safe mobile memory apparatus - Google Patents
Method for communication with safe mobile memory apparatus Download PDFInfo
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- CN101566975B CN101566975B CN200910147209.XA CN200910147209A CN101566975B CN 101566975 B CN101566975 B CN 101566975B CN 200910147209 A CN200910147209 A CN 200910147209A CN 101566975 B CN101566975 B CN 101566975B
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Abstract
The invention relates to a method for communication with a safe mobile memory apparatus, particularly relating to an identification method for the safe mobile memory apparatus and an address handshakeprotocol between a host and the safe mobile memory apparatus, belonging to the safe mobile memory field. The identification method includes: the host reads the data and backups; the host transmits an apparatus identification instruction, if the apparatus is a safe mobile memory apparatus, then the host transmits the acquisition apparatus identification response instruction, receives and determine s whether the instruction is a response instruction, if yes, then discarding the backup data and stopping the apparatus identification The address handshake protocol includes: the host transmits handshake instruction; the safe mobile memory apparatus analyzes and identifies the instruction, if the instruction is a handshake instruction package, then operating; and the host acquires the response instruction of the safe mobile memory apparatus and stops the handshake instruction. The invention solves the problems of the identification of the host to the safe mobile memory apparatus and differentcommunicating addresses owing to inconsistency of physical address and logical address of the safe mobile memory apparatus in different systems.
Description
Technical field
The present invention relates to a kind of method that communicates with safe mobile memory apparatus, belong to safe mobile storage field.Safe mobile memory apparatus adds intelligent card chip exactly on existing movable storage device, allow existing movable storage device have security functions such as encryption and decryption, authentication.
Background technology
The fast development of mobile communication technology, people are more and more higher to the requirement of obtaining in real time, using and manage of information, wish to obtain the information of its care at any time, anywhere, impel mobile storage to more high capacity, more speed with can carry out intelligent computing and direction such as dynamically update and develop.
With USB dish, SD card and mmc card is that the mobile storage product employing microprocessor (CPU) of main flow and the software of operation are thereon realized the processing of interface protocol and the control of storage media.It is almost nil that but the value-added service that these storage cards are correlated with to the mobile network is supported, security performance is poor, can't be to the secret protection of institute's stored personal information.Existing SIM card standard is unified, and operator can control business on the mobile phone by SIM card, and the user can store personal information by SIM card, is a kind of media of desirable mobile storage.But traditional SIM card memory capacity is little, movement capacity weak (using 8 or 16 bit CPUs usually), and interface rate is slow and kind is single (ISO7816 is only arranged).Current mobile value-added service such as mobile TV, mobile e-business all need to carry out a large amount of encryption and decryption transportation and data transmission, and this has brought great challenge for traditional smart card business.
Collection SIM, USB mass memory and SD/MMC are stored as many application safeties movable storage device of one, its exclusive three engagings, one function has been expanded the scope of business of SIM card, (USB SD/MMC) is integrated into the real-time system of a multitask with low-speed interface (ISO 7816) by real time operating system with high-speed interface.The release of safe mobile memory apparatus, the transmission bottleneck that makes original use ISO7816 agreement carry out data transmission and hair fastener becomes increasingly conspicuous, the transmission speed of this Kb/S can not satisfy the needs of new business far away, and the hair fastener speed of data has been subjected to very big restriction more than million grades.
In order to adapt to emerging demands of applications such as mobile TV, Mobile banking, secure data storage, become a technical barrier that needs to be resolved hurrily by high-speed interface transmission control command and data.A lot of manufacturers have proposed the instruction transmission channel that different solutions realizes a high speed, are used for the high-speed transfer of steering order and data.But these schemes all are faced with compatibility issue: special purpose interface needs the support of hardware supported or bottom layer driving, because compatible restriction, these instruction transmission channels all can't be popularized.
For solve all kinds of Secure Application popularized day by day at present to the transmission demand of the high-speed data of portable equipment, safe mobile storage etc. and steering order and each platform to the equipment interface compatibility issue, the present invention is by opening up logical channel for the transmission of steering order on prior USB 2.0 read-write protocol such as normal data such as grade, the CPU processing capacity of combined with intelligent the core of the card sheet and terminal software filter and distinguish steering order and common read/write instruction, to be implemented in the purpose of transmission steering order on the existing high-speed interface.
Summary of the invention
Technology of the present invention is dealt with problems and is: overcome the deficiencies in the prior art, the method that provides a kind of and safe mobile memory apparatus to communicate, having solved main frame may be inconsistent to safe mobile memory apparatus physical address and logical address in the identification of safe mobile memory apparatus, the different system and address that cause equal problem.
Technical conceive of the present invention is: (USB 2.0 in existing high-speed transfer agreement, SD/MMC), hew out a smart card command logic transmission channel in the data-interface instruction host-host protocol, Read, the Write instruction according to the protocol compliant form encapsulates instruction.Intelligent card chip in the safe mobile memory apparatus filters and handles the steering order of protocol compliant standard, thereby realize instruction transmission service at a high speed, that nothing is driven, expanded the function (making movable storage device also have the function of smart card) of movable storage device.
The invention solves the compatibility issue between different platform and distinct device.For various memory devices, be a physical equipment at first, and distribute physical device address a: PHY_ADD by system identification; Simultaneously, this physical equipment be operated system identification be a logical volume device loads in file system, be called logical volume equipment, just exist logical address a: LOG_ADDR.In general the equipment physical address may overlap with the apparatus logic address: PHY_ADDR=LOG_ADDR; May not overlap yet, exist skew a: PHY_ADDR=LOG_ADDR+X.For different file system, offset X may be different, when causing using logical volume equipment interface visit storage physical equipment, and the address difference.If processor filters all addresses in the safe mobile memory apparatus, can increase the collision probability between steering order and common read/write instruction on the one hand, can significantly reduce communication performance on the other hand.Handshake Protocol of the present invention mainly relies on following characteristics and addresses the above problem: for same equipment, the side-play amount between logical address and the physics is fixed.
Technical solution of the present invention is: a kind of method that communicates with safe mobile memory apparatus provided by the invention, the step that comprises main frame identification safe mobile memory apparatus, the step of main frame and safe mobile memory apparatus hand shaking instruction transport address, and main frame and safe mobile memory apparatus carry out the step of information interaction.
Wherein the step of main frame identification safe mobile memory apparatus comprises:
(11) main frame reads the n byte data that the security logic address is pointed to, and preserves these data of backup, described 0＜n＜512; In general the security logic address is to be used for the memory file system key message, and can random fluctuation, the address that common read write command can not be used.
(12) main frame judges to movable storage device transmitting apparatus recognition instruction whether this movable storage device is safe mobile memory apparatus; If this movable storage device is a safe mobile memory apparatus, then change step (13) over to; If this movable storage device is not safe mobile memory apparatus, then main frame writes the corresponding security logic address of this movable storage device with described instruction, changes step (16) over to;
(13) the steering order packet of movable storage device interception main frame transmission judges whether this packet is recognition instruction;
(14) main frame sends and obtains movable storage device identification response instruction;
(15) movable storage device produces recognition instruction;
(16) main frame reads the response instruction of movable storage device, judges whether this instruction is response instruction; If this instruction is response instruction, then main frame abandons the Backup Data in the step (11); If this instruction is not a response instruction, then main frame writes this movable storage device with the Backup Data in the step (11);
(17) recognition of devices stops.
Wherein the step of main frame and safe mobile memory apparatus hand shaking instruction transport address comprises:
(21) main frame sends the instruction of shaking hands to safe mobile memory apparatus;
(22) safe mobile memory apparatus is tackled the packet that main frame is sent, and this packet is analyzed identification; If this packet then changes step (23) over to for the instruction bag of shaking hands; Otherwise,, enter waiting status if this packet then abandons this packet not for the instruction bag of shaking hands;
(23) safe mobile memory apparatus is carried out instruction in the instruction bag of shaking hands;
(24) main frame reads the response instruction of safe mobile memory apparatus;
(25) stop the state of shaking hands.
Wherein main frame and the safe mobile memory apparatus step of carrying out information interaction comprises:
(31) main frame sends the safe mobile memory apparatus steering order with the Write instruction;
(32) steering order that safe mobile memory apparatus is discerned and tackled and processing host is sent;
(33) main frame sends with the Read instruction and obtains the safe mobile memory apparatus response command;
(34) safe mobile memory apparatus produces response message;
(35) main frame obtains the response message of safe mobile memory apparatus, and makes respective handling;
(36) communication termination.
Further, movable storage device judges by the transmission address and the data packet head of described steering order packet whether this packet is recognition instruction in the described step (13).
Main frame security logic address in safe mobile memory apparatus sends the instruction of shaking hands in the described step (21).
The middle safe mobile memory apparatus of described step (22) judges according to the physical address and the data packet head of the packet that main frame is sent whether this packet is the instruction bag of shaking hands.
The middle safe mobile memory apparatus of described step (23) is carried out and instructed in the instruction bag of shaking hands is the register that security logic address physical address corresponding is write intelligent card chip in the safe mobile memory apparatus.
The steering order of sending by the intelligent card chip processing host in the safe mobile memory apparatus in the described step (32); Produce response message by the intelligent card chip in the safe mobile memory apparatus in the described step (34).
The present invention compared with prior art has following advantage:
(1) recognition methods of the present invention provides the safeguard protection to non-safe mobile memory apparatus; Handshake Protocol has solved the compatibling problem between different platform and distinct device well; the fully compatible existing block device driving interface of this Handshake Protocol, and can be at a high speed, do not have a transmission steering order of driving.
(2) smart card in the safe mobile memory apparatus of the present invention writes register in the card with the safe physical address of security logic address correspondence, in the instruction transmission afterwards, only need to filter the instruction that is sent to safe physical address, so just can significantly reduce collision probability, and improve the performance of equipment.
(3) main frame of the present invention only need instruct transmission to the security logic address, does not need to understand the physical address of bottom.For identical main frame and different systems, the physical address of equipment generally is different, but the logical address of equipment is identical, and main frame does not need to revise targetedly.
Description of drawings
Fig. 1 is the overview flow chart of the safe mobile memory apparatus steering order transmission of the embodiment of the invention;
Fig. 2 is the safe mobile memory apparatus identification process figure of the embodiment of the invention;
Fig. 3 is the hand shaking address process flow diagram of the embodiment of the invention.
Embodiment
Block devices such as USB dish, SD card and mmc card are when the general data transmission of carrying out, various data transmission interface all provides reliable physical data block transmission service: by specifying the piece number of starting block logical address or sevtor address and transmission, Data Transport Protocol is responsible for realizing reliable data transmission.Device identification method of the present invention and Handshake Protocol are on the block device data transmission interface, judge and the TAG filtration by using special logical address, agreement is utilized the transmitting-receiving of the non-buffering implementing reading and writing instruction of standard, thereby serves for safe mobile memory apparatus provides instruction transmission easily.In order to realize instruction transmission reliably, the recognition method of director data bag and response data packet is extremely important.
Bump for fear of smart card instruction bag data and read/write general data bag, logical address safe in utilization activates the address as instruction request among the present invention.The security logic address refers to the logical address that read/write general data piece can not be used in the safe mobile memory apparatus, and the logical address that standard data interface is supported.General desirable storage security movable storage device file system critical data and address that can random fluctuation, for example the logical address 0x04 of being used for.When main frame is that start address is carried out when writing request with the security logic address, the instruction recognition logic is activated, and Equipment Inspection writes packet header TAG and judges whether to be the effective instruction request.If be effective instruction, then will write data interception, and send to the instruction buffer; Otherwise not effective instruction request, be common reading and writing data request, directly data are write security logic address physical address corresponding.
Because the difference of file system, safe mobile memory apparatus is when being operated system identification, the situation that may exist equipment physical address and logical address not to overlap had both existed side-play amount: physical address=logical address+side-play amount between physical address and the logical address.In the different file system, this side-play amount generally is different.When main frame uses logical volume equipment interface visit storage physical equipment, can cause the address difference.If chip filters the address of all move instructions in the safe mobile memory apparatus, will bring following two problems like this: the collision probability that 1. can increase steering order and common read/write instruction; 2. too much filtering instructions can significantly reduce the ability to communicate of blocking.But for same equipment, its address offset amount is fixed.
Owing to use write operation transmissions of executing instruction in the Handshake Protocol of safe mobile memory apparatus address,, could carry out Handshake Protocol after must first actuating equipment identification routine and instruct and transmit for fear of damage to data in the ordinary mobile storage.
Below with reference to accompanying drawing embodiments of the invention are described.
As shown in Figure 1, the method that communicates with safe mobile memory apparatus, the step that comprises main frame identification safe mobile memory apparatus, main frame and safe mobile memory apparatus hand shaking smart card are instructed the step of transport address, and main frame and safe mobile memory apparatus carry out the step of information interaction.
Movable storage device inserts main frame by high-speed interface; Main frame is discerned (not being destroyed in order to the critical data in the protection generic storage equipment) to movable storage device, is safe mobile memory apparatus as if this movable storage device, then main frame and this movable storage device hand shaking smart card instruction transport address.
As shown in Figure 2, the step of main frame identification safe mobile memory apparatus comprises:
(11) main frame reads the n byte data that the security logic address is pointed to common reading instruction, and preserves these data of backup, described 0＜n＜512; In general the security logic address is to be used for the memory file system key message, and can random fluctuation, the address that common read write command can not be used.
(12) main frame judges to movable storage device transmitting apparatus recognition instruction whether this movable storage device is safe mobile memory apparatus; If this movable storage device is a safe mobile memory apparatus, then change step (13) over to; If this movable storage device is not safe mobile memory apparatus, then main frame writes the corresponding security logic address of this movable storage device with described instruction, changes step (16) over to;
(13) the steering order packet of movable storage device interception main frame transmission judges by the transmission address and the data packet head of steering order packet whether this packet is recognition instruction;
(14) main frame sends and obtains movable storage device identification response instruction;
(15) movable storage device produces recognition instruction;
(16) main frame reads the response instruction of movable storage device, judges whether this instruction is response instruction; If this instruction is response instruction, then main frame abandons the Backup Data in the step (11); If this instruction is not a response instruction, then main frame writes this movable storage device with the Backup Data in the step (11);
(17) recognition of devices stops.
In the safe mobile memory apparatus identifying, safe mobile memory apparatus recognition instruction form makes as follows:
| Character string " * SSC*MEMORY*EQUIP*IDENT*COMAAND* " (32 byte) |
Wherein 32 byte character strings can be self-defined, and this character string is the TAG that agreement is discerned equipment.Simultaneously, legitimate device produces response, and main frame reads, and finishes the identification to equipment.The legal response instruction form that equipment produces is as follows:
| Character string " * SSC*MEMORY*EQUIP*RECOGN*COMAAND* " (32 byte) |
As shown in Figure 3, the step of main frame and safe mobile memory apparatus hand shaking smart card instruction transport address comprises:
(21) main frame security logic address in safe mobile memory apparatus sends the instruction of shaking hands;
(22) packet that intelligent card chip interception main frame is sent in the safe mobile memory apparatus is analyzed identification to this packet, and the physical address and the data packet head TAG of the packet of sending according to main frame judge whether this packet is the instruction bag of shaking hands; If this packet then changes step (23) over to for the instruction bag of shaking hands; Otherwise,, enter waiting status if this packet then abandons this packet not for the instruction bag of shaking hands;
(23) intelligent card chip is carried out instruction in the instruction bag of shaking hands in the safe mobile memory apparatus, and security logic address physical address corresponding is write register in the smart card;
(24) main frame reads the response instruction of safe mobile memory apparatus;
(25) stop the state of shaking hands.
The director data packet format of shaking hands is as follows:
| Character string " * SSC*MEMORY*HAND*SHAKE*COMAAND* " (32 byte) | The director data bag |
Wherein 32 byte character strings can be customized for marking head arbitrarily, and this character string is the TAG that main frame and safe mobile memory apparatus carry out address negotiation, are used for the foundation and the sign safe mobile memory apparatus recognition instruction of logical channel.In the director data bag is smart card control instruction, and order format is as follows:
| Director data length (2BYTE) | Director data (MAX 65535 BYTE) |
The step that main frame and safe mobile memory apparatus carry out information interaction comprises (step after the hand shaking address as shown in Figure 1):
(31) main frame sends smart card control instruction with the Write instruction;
(32) safe mobile memory apparatus is discerned and is tackled this steering order, and handles this steering order by intelligent card chip;
(33) main frame sends with the Read instruction and obtains the safe mobile memory apparatus response command;
(34) intelligent card chip produces response message in the safe mobile memory apparatus;
(35) main frame obtains the response message of safe mobile memory apparatus, and makes respective handling;
(36) communication termination.
The content that is not described in detail in the instructions of the present invention belongs to this area professional and technical personnel's known technology.
The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (6)
1. method that communicates with safe mobile memory apparatus, it is characterized in that: the step that comprises main frame identification safe mobile memory apparatus, the step of main frame and safe mobile memory apparatus hand shaking instruction transport address, and main frame and safe mobile memory apparatus carry out the step of information interaction; Wherein,
The step of described main frame identification safe mobile memory apparatus comprises:
(11) main frame reads the n byte data that the security logic address is pointed to, and preserves these data of backup, described 0＜n＜512;
(12) main frame judges to movable storage device transmitting apparatus recognition instruction whether this movable storage device is safe mobile memory apparatus; If this movable storage device is a safe mobile memory apparatus, then change step (13) over to; If this movable storage device is not safe mobile memory apparatus, then main frame writes the corresponding security logic address of this movable storage device with described instruction, changes step (16) over to;
(13) the steering order packet of movable storage device interception main frame transmission judges whether this packet is recognition instruction;
(14) main frame sends and obtains movable storage device identification response instruction;
(15) movable storage device produces recognition instruction;
(16) main frame reads the response instruction of movable storage device, judges whether this instruction is response instruction; If this instruction is response instruction, then main frame abandons the Backup Data in the step (11); If this instruction is not a response instruction, then main frame writes this movable storage device with the Backup Data in the step (11);
(17) recognition of devices stops;
The step of described main frame and safe mobile memory apparatus hand shaking instruction transport address comprises:
(21) main frame sends the instruction of shaking hands to safe mobile memory apparatus;
(22) safe mobile memory apparatus is tackled the packet that main frame is sent, and this packet is analyzed identification; If this packet then changes step (23) over to for the instruction bag of shaking hands; Otherwise,, enter waiting status if this packet then abandons this packet not for the instruction bag of shaking hands;
(23) safe mobile memory apparatus is carried out instruction in the instruction bag of shaking hands;
(24) main frame reads the response instruction of safe mobile memory apparatus;
(25) stop the state of shaking hands;
The step that described main frame and safe mobile memory apparatus carry out information interaction comprises:
(31) main frame sends the safe mobile memory apparatus steering order with the Write instruction;
(32) steering order that safe mobile memory apparatus is discerned and tackled and processing host is sent;
(33) main frame sends with the Read instruction and obtains the safe mobile memory apparatus response command;
(34) safe mobile memory apparatus produces response message;
(35) main frame obtains the response message of safe mobile memory apparatus, and makes respective handling;
(36) communication termination.
2. a kind of method that communicates with safe mobile memory apparatus according to claim 1, it is characterized in that: movable storage device judges by the transmission address and the data packet head of described steering order packet whether this packet is recognition instruction in the described step (13).
3. a kind of method that communicates with safe mobile memory apparatus according to claim 1 is characterized in that: main frame security logic address in safe mobile memory apparatus sends the instruction of shaking hands in the described step (21).
4. a kind of method that communicates with safe mobile memory apparatus according to claim 3 is characterized in that: the middle safe mobile memory apparatus of described step (22) judges according to the physical address and the data packet head of the packet that main frame is sent whether this packet is the instruction bag of shaking hands.
5. a kind of method that communicates with safe mobile memory apparatus according to claim 4 is characterized in that: the middle safe mobile memory apparatus of described step (23) is carried out and instructed in the instruction bag of shaking hands is the register that security logic address physical address corresponding is write intelligent card chip in the safe mobile memory apparatus.
6. a kind of method that communicates with safe mobile memory apparatus according to claim 1 is characterized in that: the steering order of being sent by the intelligent card chip processing host in the safe mobile memory apparatus in the described step (32); Produce response message by the intelligent card chip in the safe mobile memory apparatus in the described step (34).
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| CN200910147209.XA CN101566975B (en) | 2009-06-08 | 2009-06-08 | Method for communication with safe mobile memory apparatus |
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| CN200910147209.XA CN101566975B (en) | 2009-06-08 | 2009-06-08 | Method for communication with safe mobile memory apparatus |
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| CN101566975B true CN101566975B (en) | 2011-03-23 |
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| CN102147721B (en) * | 2011-01-26 | 2014-03-26 | 北京握奇数据系统有限公司 | Method for processing instruction in busy state, and smart card |
| CN104077243A (en) * | 2014-07-10 | 2014-10-01 | 王爱华 | SATA hard disc device encryption method and system |
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| CN1918584A (en) * | 2004-02-12 | 2007-02-21 | 精密生物测定股份公司 | Portable data carrier, external arrangement, system and methods for wireless data transfer |
| CN101004718A (en) * | 2006-01-18 | 2007-07-25 | 国际商业机器公司 | Method and system for eliminating content of data storage apparatus based on RFID data |
| CN101510187A (en) * | 2009-03-20 | 2009-08-19 | 华中科技大学 | Method for implementing smart card control instruction communication on standard data interface |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1918584A (en) * | 2004-02-12 | 2007-02-21 | 精密生物测定股份公司 | Portable data carrier, external arrangement, system and methods for wireless data transfer |
| CN101004718A (en) * | 2006-01-18 | 2007-07-25 | 国际商业机器公司 | Method and system for eliminating content of data storage apparatus based on RFID data |
| CN101510187A (en) * | 2009-03-20 | 2009-08-19 | 华中科技大学 | Method for implementing smart card control instruction communication on standard data interface |
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