CN103714634A - Method and system for safely downloading terminal master key - Google Patents

Method and system for safely downloading terminal master key Download PDF

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Publication number
CN103714634A
CN103714634A CN201310740226.0A CN201310740226A CN103714634A CN 103714634 A CN103714634 A CN 103714634A CN 201310740226 A CN201310740226 A CN 201310740226A CN 103714634 A CN103714634 A CN 103714634A
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key
master key
terminal
tmk
downloader
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CN103714634B (en
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孟陆强
姚承勇
彭波涛
苏文龙
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Fujian Landi Commercial Equipment Co Ltd
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Fujian Landi Commercial Equipment Co Ltd
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Priority claimed from CN2013100846538A external-priority patent/CN103237005A/en
Priority claimed from CN2013100843972A external-priority patent/CN103237004A/en
Priority claimed from CN2013100846716A external-priority patent/CN103220270A/en
Priority claimed from CN2013100846735A external-priority patent/CN103220271A/en
Application filed by Fujian Landi Commercial Equipment Co Ltd filed Critical Fujian Landi Commercial Equipment Co Ltd
Priority to CN201310740226.0A priority Critical patent/CN103714634B/en
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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/08—Payment architectures
    • G06Q20/20—Point-of-sale [POS] network systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/32—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials
    • H04L9/321—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols including means for verifying the identity or authority of a user of the system or for message authentication, e.g. authorization, entity authentication, data integrity or data verification, non-repudiation, key authentication or verification of credentials involving a third party or a trusted authority
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
    • G06Q20/00—Payment architectures, schemes or protocols
    • G06Q20/38—Payment protocols; Details thereof
    • G06Q20/382—Payment protocols; Details thereof insuring higher security of transaction
    • G06Q20/3829—Payment protocols; Details thereof insuring higher security of transaction involving key management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L63/00—Network architectures or network communication protocols for network security
    • H04L63/06—Network architectures or network communication protocols for network security for supporting key management in a packet data network
    • H04L63/061—Network architectures or network communication protocols for network security for supporting key management in a packet data network for key exchange, e.g. in peer-to-peer networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/0825—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) using asymmetric-key encryption or public key infrastructure [PKI], e.g. key signature or public key certificates
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L9/00—Cryptographic mechanisms or cryptographic arrangements for secret or secure communications; Network security protocols
    • H04L9/08—Key distribution or management, e.g. generation, sharing or updating, of cryptographic keys or passwords
    • H04L9/0816—Key establishment, i.e. cryptographic processes or cryptographic protocols whereby a shared secret becomes available to two or more parties, for subsequent use
    • H04L9/0819—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s)
    • H04L9/083—Key transport or distribution, i.e. key establishment techniques where one party creates or otherwise obtains a secret value, and securely transfers it to the other(s) involving central third party, e.g. key distribution center [KDC] or trusted third party [TTP]

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  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Business, Economics & Management (AREA)
  • Accounting & Taxation (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • General Business, Economics & Management (AREA)
  • General Physics & Mathematics (AREA)
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  • Finance (AREA)
  • Computer Hardware Design (AREA)
  • Computing Systems (AREA)
  • General Engineering & Computer Science (AREA)
  • Storage Device Security (AREA)
  • Cash Registers Or Receiving Machines (AREA)
  • Management, Administration, Business Operations System, And Electronic Commerce (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Computer And Data Communications (AREA)
  • Small-Scale Networks (AREA)
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Abstract

The invention discloses a method for safely downloading a terminal master key. The method includes the steps that S1, a key downloader generates or imports a pair of keys which are a private key (Pu) and a public key (Pr); S2, the key downloader generates or imports the terminal master key (TMK); S3, the key downloader uses the Pr for encrypting the TMK to generate a master key ciphertext (Ctmk); S4, the key downloader transmits the Pu and the Ctmk to a POS terminal; S5, the POS terminal uses the Pu for decrypting the Ctmk to obtain the TMK, and the TMK is stored into a pin pad. The invention further discloses a system for safely downloading the TMK. The method and system have the advantages that the unsymmetrical keys encrypts the TMK and then perform downloading between the key downloader and the POS terminal, the TMK is transmitted in a ciphertext mode in the transmission process, only the POS terminal and the key downloader can decrypt the TMK to obtain a master key plaintext, and therefore safety of master key downloading is greatly improved.

Description

A kind of method and system of secure download terminal master key
Technical field
The present invention relates to E-Payment field, relate in particular to a kind of method and system of secure download terminal master key.
Background technology
(Bank Card) is more and more universal as the means of payment for bank card, common bank card paying system, comprise point of sales terminal (Point Of Sale:POS), terminal management system (Terminal ManageSystem:TMS), code keypad (PIN PAD) and hardware encipher machine (Hardware and SecurityModule:HSM).[0003] wherein POS terminal can be accepted bank card information, has communication function, and accept teller's instruction and complete financial transaction information and for information about exchange equipment; TMS system is managed concentratedly subordinate's POS terminal, comprises parameter downloads, and key is downloaded, and accepts, processes or forward the transaction request of POS terminal, and to centralized management and the transaction processing system of POS terminal loopback transaction results information; Code keypad (PIN PAD) is that TMK, PIK and MAK are carried out to safe storage protection, and the safety equipment that PIN are encrypted to protection; Hardware encipher machine (Hardware and SecurityModule:HSM) is the peripheral hardware equipment that is encrypted of data to transmission, for correctness and the storage key of encryption and decryption, checking message and the document source of PIN.Personal identification code (Personal Identification Number; PIN), personal identification number, is the data message of identifying holder's identity legitimacy in on-line transaction, and in cyber-net system, any link does not allow PIN to occur in mode expressly; Terminal master key (Terminal Master Key; TMK): during POS terminal works, the master key that working key is encrypted, is kept in system hardware, can only use, and can not read; Working key (workingkey; WK), also referred to as data key, generally include the key (being called for short MAK) that PIN encryption key (being called for short PIK) and message differentiate that MAC calculates, working key must often upgrade, in the message of online renewal, with terminal master key (TMK), working key is encrypted, after formation ciphertext, transmits again.
POS terminal is widely used in bank card and pays occasion, such as market shopping, hotel's mandate etc., is a kind of indispensable modernization means of payment, has incorporated people's normal life.Bank card (particularly debit card) is generally all provided with PIN by holder; in carrying out payment process; POS terminal is except above sending the data such as magnetic track information of bank card; also require holder to input the checking holder of PINGong issuing bank identity legitimacy; to guarantee bank card safety of payment, protection holder's property safety.In order to prevent that PIN from revealing or being cracked, requirement is from terminal to issuing bank in whole information interactive process, and whole process is carried out safety encipher protection to PIN, does not allow any link in cyber-net system, and PIN occurs in mode expressly.For this reason, the current POS terminal that can accept input PIN all requires to be equipped with key management system.
The key code system of POS terminal is divided into secondary: terminal master key (TMK) and working key (WK).Wherein TMK is encrypted protection to WK, and every POS terminal has unique TMK, must have safety precautions, and assurance can only write hardware device and participate in computing, can not be read; WK comprises the PIK for PIN is encrypted and the MAK two parts that carry out message discriminating (MAC), by TMS, calling encryption equipment produces, when POS terminal is registered to TMS, download, and to utilize TMK encrypted transmission and storage, its cryptographic algorithm be all to use the very high 3DES algorithm of level of security.Specific works key is downloaded flow process:
POS terminal initiates to TMS the request of registering;
TMS calls random PIK and the MAK encrypting with TMK that generate of encryption equipment;
POS terminal receives PIK and the MAK ciphertext of returning from TMS, and deposits code keypad in.
In bank card payment process; while inputting by keyboard; on after the PIN that utilizes PIK to input holder by code keypad is encrypted, give TMS; then TMS change and is transmitted to issuing bank afterwards and carries out authorisation process by calling encryption equipment the PIN after encrypting again; in whole transmitting procedure, guarantee that PIN utilizes hardware to be encrypted protection; it encrypts the 3DES cryptographic algorithm of using is to be also widely used so far one of cryptographic algorithm that level of security is very high, is conventionally applied in financial industry.
From working key downloading process above, can find out, TMK is a very crucial root key.If TMK is intercepted, PIK, MAK even PIN can utilize 3DES algorithm to crack, by serious threat bank card safety of payment.So can TMK secure download arrive POS terminal, also just becomes the committed step of a cipher safe protecting.Below we are summarized as follows current existing TMK method for down loading:
In every way plaintext TMK or ciphertext TMK are imported in the female POS terminal of a key, finally all need to download storage plaintext master key in female POS terminal, the POS terminal of the master key TMK that the female POS terminal of key is downloaded with needs by serial ports is connected, and plaintext master key TMK is downloaded in POS terminal.
Because master key TMK is downloaded and is transferred in POS terminal by female POS, by plaintext transmission, there is potential safety hazard, if intercepted, will cause the leakage of master key TMK midway.
Summary of the invention
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: when key downloader is downloaded master key to POS terminal in safe house, after use asymmetric arithmetic is encrypted key plain, be transferred in POS terminal, be specially:
A method for secure download terminal master key, comprises step: S1, the generation of key downloader or importing secret key are to private key Pu, PKI Pr; S2, key downloader produce or import terminal master key TMK; S3, key downloader use private key Pr to encrypt terminal master key TMK and generate master key ciphertext Ctmk; S4, key downloader are sent to POS terminal by PKI Pu and master key ciphertext Ctmk; S5, the POS terminal Pu deciphering master key ciphertext Ctmk that uses public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
Another technical scheme of the present invention is:
A system for secure download terminal master key, comprises key downloader and POS terminal; Described key downloader comprises key generation module, master key generation module, encrypting module, master key sending module, and described POS terminal comprises master key receiver module; Described key generation module for generation of or importing secret key to private key Pu, PKI Pr; Described master key generation module for generation of or import terminal master key TMK; Described encrypting module is used for using private key Pr to encrypt terminal master key TMK generation master key ciphertext Ctmk; Described master key sending module is for being sent to POS terminal by PKI Pu and master key ciphertext Ctmk; The described master key receiver module Pu deciphering master key ciphertext Ctmk that is used for using public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
Beneficial effect of the present invention is: after using unsymmetrical key to encrypt master key between key downloader of the present invention and POS terminal, download, master key is all to transmit with ciphertext form in transmitting procedure, can only POS terminal and key downloader self can obtain master key expressly to its deciphering, the potential safety hazard that the master key of having avoided existing by plaintext transmission master key is intercepted midway, has greatly improved master key and has downloaded safety.
Accompanying drawing explanation
Fig. 1 is the structured flowchart that the present invention real executes the system of a kind of secure download terminal master key of mode;
Fig. 2 is the method flow diagram of the method for a kind of secure download terminal master key of another embodiment of the present invention;
Fig. 3 is the method flow diagram of the method for a kind of secure download terminal master key of another embodiment of the present invention;
Fig. 4 is the method flow diagram of the method for a kind of secure download terminal master key of another embodiment of the present invention.
Main element symbol description:
10:POS terminal; 20: key downloader; 101: master key receiver module; 201: key generation module; 202: master key generation module; 203: encrypting module; 204: master key sending module.
Embodiment
By describing technology contents of the present invention, structural attitude in detail, being realized object and effect, below in conjunction with embodiment and coordinate accompanying drawing to be explained in detail.
First, the abbreviation the present invention relates to and Key Term are defined and are illustrated:
HSM_VENDOR: supplier's hardware encipher machine;
The abbreviation of AUK:Authentication Key, authentication authorization and accounting key, for the two-way authentication between PINPAD and key management system KMS;
CA center: so-called CA(Certificate Authority) center, it is to adopt PKI(Public Key Infrastructure) public key infrastructure technology, network ID authentication service is provided specially, be responsible for signing and issuing and managing digital certificate, and third party's trust authority with authoritative and fairness, its effect is just as the company of issue certificates in our actual life, as passport is handled mechanism;
The abbreviation of HSM:High Security Machine, high safety equipment are hardware encipher machine in this system;
KMS system: Key Management System, key management system, for office terminal master key TMK;
The abbreviation of MAK:Mac Key, MAC computation key, consults to determine 24 byte symmetric keys with client, for the MAC value of TK between MTMS system and KMS system, calculates;
MTMS: full name Material Tracking Management System, Tracing Material management system is mainly used when plant produced;
The abbreviation of PIK:Pin Key, Pin encryption key, is a kind of of working key;
PINPAD: code keypad;
The abbreviation of PK:Protect Key, Protective Key, consults to determine with client, 24 byte symmetric keys.Encrypted transmission for TK between MTMS/TCS and KMS;
The abbreviation of POS:Point Of Sale, i.e. point-of-sale terminal
SNpinpad: the sequence number of code keypad, when PINPAD is built-in, SNpos is consistent with POS terminal serial number;
The sequence number of SN:POS terminal;
The abbreviation of TEK:Transmission Encrypt Key, i.e. traffic encryption key, 24 byte symmetric keys, for the encrypted transmission of TMK between PINPAD and key management system KMS;
The abbreviation of TK:Transmission Key, i.e. transmission security key.Transmission security key is comprised of traffic encryption key TEK and two-way authentication key A UK;
The abbreviation of TMS:Terminal Management System, i.e. terminal management system, for completing the functions such as the management of POS end message, software and parameter configuration, remote download, the management of terminal running state information, remote diagnosis;
The abbreviation of TMK:Terminal Master Key, i.e. terminal master key, for POS terminal with pay the encrypted transmission of receiving working key between single system;
Safe house: have higher security level other, for the room of service device, this room needs just can enter after authentication.
Intellective IC card: be CPU card, integrated circuit in card comprises central processor CPU, programmable read only memory EEPROM, random access memory ram and is solidificated in the card internal operating system COS (Chip Operating System) in read only memory ROM, and in card, data are divided into outside and read and inter-process part.
Symmetric key: the both sides that transmit and receive data must use identical key to being expressly encrypted and decrypt operation.Symmetric key encryption algorithm mainly comprises: DES, 3DES, IDEA, FEAL, BLOWFISH etc.
Unsymmetrical key: rivest, shamir, adelman needs two keys: public-key cryptography (private key Public key) and private cipher key (PKI Private key).Public-key cryptography and private cipher key are a pair of, if data are encrypted with public-key cryptography, only have with corresponding private cipher key and could decipher; If data are encrypted with private cipher key, only have so with corresponding public-key cryptography and could decipher.Because what encryption and decryption were used is two different keys, so this algorithm is called rivest, shamir, adelman.The basic process that rivest, shamir, adelman is realized confidential information exchange is: Party A generates a pair of secret keys handle wherein is open as Public key to other side; After using this key to be encrypted confidential information, the Party B who obtains this Public key sends to again Party A; Another private key that Party A preserves with oneself is again decrypted the information after encrypting.Party A sends to Party B after can using Party B's PKI to be encrypted confidential information again; Party B is decrypted the information after encrypting with the private spoon of oneself again.Main algorithm has RSA, Elgamal, knapsack algorithm, Rabin, D-H, ECC(elliptic curve encryption algorithm).
RSA: a kind of asymmetric key algorithm.RSA public key encryption algorithm is by Ron Rivest, Adi Shamirh and Len Adleman, in (Massachusetts Institute Technology), to be developed for 1977.RSA is named the name from they three of exploitation.RSA is the most influential public key encryption algorithm at present, and it can resist up to the present known all cryptographic attacks, by ISO, is recommended as public key data encryption standard.RSA Algorithm is true based on a foolproof number theory: two large prime numbers are multiplied each other very easy.RSA Algorithm be first can be simultaneously for encrypting the algorithm with digital signature, also easy to understand and operation.RSA is studied public key algorithm the most widely, from proposing three ten years till now, has experienced the test of various attack, for people accept, generally believes it is one of current classic PKI scheme gradually.
TDES Triple-DES:DES is a kind of symmetric encipherment algorithm, and key is 8 bytes.TDES is the cryptographic algorithm based on DES, and its key is 16 bytes or 24 bytes.TDES/3DES is the abbreviated expression (being triple DES) of English TripleDES, and DES is that English Data Encryption Standard(counts encryption standard) abbreviated expression.DES is a kind of symmetric key encryption algorithm, i.e. the data encryption key cryptographic algorithm identical with decruption key.DESYou IBM Corporation develops and discloses at 20 century 70s, and for U.S. government adopts, Bing Bei NBS and ANSI (ANSI) are admitted subsequently.TDES/3DES is a kind of pattern of des encryption algorithm, and it uses the key of 3 64 to carry out three encryptions to data.It is a safer distortion of DES.
Referring to Fig. 1, is the structured flowchart of the system of a kind of secure download terminal master key of an embodiment of the present invention, and this system comprises key downloader 20 and POS terminal 10; Described key downloader 20 comprises key generation module 201, master key generation module 202, encrypting module 203, master key sending module 204, and described POS terminal 10 comprises master key receiver module 101.
Described key generation module 201 for generation of or importing secret key to private key Pu, PKI Pr;
Described master key generation module 202 for generation of or import terminal master key TMK;
Described encrypting module 203 generates master key ciphertext Ctmk for using private key Pr to encrypt terminal master key TMK;
Described master key sending module 204 is for being sent to POS terminal 10 by PKI Pu and master key ciphertext Ctmk;
Described master key receiver module 101 obtains terminal master key TMK for the Pu deciphering master key ciphertext Ctmk that uses public-key, and terminal master key TMK is stored to code keypad.
In actual conditions, in the safe house of Yi Ge bank, be provided with the key downloader of a plurality of acquirers, any key downloader has and master key can be downloaded in the POS terminal of same communication interface.But, there are at present a lot of acquirers all by the privatization of POS terminal, only allow the POS terminal downloads master key of the key downloader of this acquirer to this acquirer.But the key downloader of a lot of different acquirers remains identical with the communication interface of POS terminal, still can download master key.For further solving the corresponding relation of key downloader and POS terminal, make to only have the key downloader of this acquirer master key could be downloaded in the POS terminal of this acquirer, technical scheme of the present invention is that master key downloader and the POS terminal master key downloaded by CA center are carried out identification.
Wherein, the system of described secure download terminal master key also comprises CA center; Described CA center comprises certificate preset module.
Described key generation module 201 for generation of or import public private key pair private key Pr and PKI Pu, and PKI Pu is issued to CA center; Described certificate preset module is used for generating acquirer root certificate AcquireRCRT and corresponding private key AcquireRCRT_Prk, uses AcquireRCRT_Prk signature to generate acquirer work certificate AcquireWCRT the Pu receiving; And for described work certificate AcquireWCRT and private key AcquireWCRT_Prk are stored in to key downloader 20, described acquirer root certificate AcquireRCRT is stored in to POS terminal 10;
Described master key generation module 202 for generation of or import terminal master key TMK;
Described encrypting module 203 generates master key ciphertext Ctmk for using private key Pr to encrypt terminal master key TMK;
Described master key sending module 204 is for being sent to POS terminal 10 by acquirer work certificate AcquireWCRT and master key ciphertext Ctmk; Described master key receiver module 101 is for using the legitimacy of acquirer root certificate AcquireRCRT authentication acquirer work certificate AcquireWCRT, and for when described authentication is legal, from acquirer work certificate AcquireWCRT extraction Pu;
Master key receiver module 101 obtains terminal master key TMK for the Pu deciphering master key ciphertext Ctmk that uses public-key, and terminal master key TMK is stored to code keypad.
Wherein, described key downloader 20 also comprises importing module, and described POS terminal 10 also comprises download request module.
Described importing module is for by all terminal serial number SN importing secret key downloaders that need to download the POS terminal of master key TMK, described key generation module 201 for generation of or importing secret key to private key Pu, PKI Pr;
Described master key generation module 202 is for producing correspondingly or import terminal master key TMK according to each terminal serial number SN;
Described download request module, for setting up wire communication while being connected with key downloader, sends to key downloader by terminal serial number SN and master key download request; Described encrypting module 203 imports for verifying whether the terminal serial number SN of POS terminal 10 is present in the terminal serial number SN that module imports, and for after being verified, using private key Pr to encrypt terminal master key TMK and generate master key ciphertext Ctmk;
Described master key sending module 204 is for being sent to POS terminal 10 by PKI Pu and master key ciphertext Ctmk;
Described master key receiver module 101 obtains terminal master key TMK for the Pu deciphering master key ciphertext Ctmk that uses public-key, and terminal master key TMK is stored to code keypad.
Referring to Fig. 2, is the method flow diagram of a kind of method of secure download terminal master key in an embodiment of the present invention, and this comprises step:
S1, the generation of key downloader or importing secret key are to private key Pu, PKI Pr;
S2, key downloader produce or import terminal master key TMK;
S3, key downloader use private key Pr to encrypt terminal master key TMK and generate master key ciphertext Ctmk;
S4, key downloader are sent to POS terminal by PKI Pu and master key ciphertext Ctmk;
S5, the POS terminal Pu deciphering master key ciphertext Ctmk that uses public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
Referring to Fig. 3, is the method flow diagram of the method for a kind of secure download terminal master key of another embodiment of the present invention, and the method specifically comprises step:
S1, key downloader produce or import public private key pair private key Pr and PKI Pu, and PKI Pu is issued to CA center, CA center generates acquirer root certificate AcquireRCRT and corresponding private key AcquireRCRT_Prk, the key receiving is downloaded to PKI Pu and use AcquireRCRT_Prk signature to generate acquirer work certificate AcquireWCRT;
Key downloader is stored described work certificate AcquireWCRT and private key AcquireWCRT_Prk;
Acquirer root certificate AcquireRCRT described in POS terminal storage;
S2, key downloader produce or import terminal master key TMK;
S3, key downloader use private key Pr to encrypt terminal master key TMK and generate master key ciphertext Ctmk;
S4, key downloader are sent to POS terminal by acquirer work certificate AcquireWCRT and master key ciphertext Ctmk, POS terminal is used the legitimacy of acquirer root certificate AcquireRCRT authentication acquirer work certificate AcquireWCRT, if it is legal to authenticate, from acquirer work certificate AcquireWCRT, extract Pu;
S5, the POS terminal Pu deciphering master key ciphertext Ctmk that uses public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
Wherein, described step S1 also comprises:
POS terminal is set up wire communication with key downloader and is connected, and described wire communication is connected to serial ports connection or USB connects.
Referring to Fig. 4, is the method flow diagram of a kind of method of secure download terminal master key in an embodiment of the present invention, and the method specifically comprises step:
S1, by all terminal serial number SN importing secret key downloaders that need to download the POS terminal of master key TMK, key downloader produce or importing secret key to private key Pu, PKI Pr;
S2, key downloader produce or import terminal master key TMK correspondingly according to each terminal serial number SN;
S3, POS terminal are set up wire communication with key downloader and are connected, and terminal serial number SN and master key download request are sent to key downloader, key downloader verifies whether the terminal serial number SN of this POS terminal is present in the terminal serial number SN importing in step S1, after being verified, key downloader uses private key Pr to encrypt terminal master key TMK and generates master key ciphertext Ctmk;
S4, key downloader are sent to POS terminal by PKI Pu and master key ciphertext Ctmk;
S5, the POS terminal Pu deciphering master key ciphertext Ctmk that uses public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
Beneficial effect of the present invention is: after using unsymmetrical key to encrypt master key between key downloader of the present invention and POS terminal, download, master key is all to transmit with ciphertext form in transmitting procedure, can only POS terminal and key downloader self can obtain master key expressly to its deciphering, the potential safety hazard that the master key of having avoided existing by plaintext transmission master key is intercepted midway, has greatly improved master key and has downloaded safety.
Further, the present invention produces by key downloader or from the unique public private key pair having of outside importing secret key downloader, PKI is issued to CA center, CA center is the work certificate that key downloader generates specific acquirer, and work certificate is stored in key downloader, CA center is that the acquirer that key downloader is corresponding produces acquirer root certificate, by acquirer root certificate storage in POS terminal, by described work certificate and root certificate, identify this key downloader and whether POS terminal is to belong to same acquirer, therefore effectively guarantee to only have the POS terminal downloads master key that the key downloader of this acquirer could be to this acquirer, realize the privatization of POS terminal acquirer.
Further, the present invention is by importing in advance the POS terminal serial number in key downloader, when POS terminal access key downloader, whether the terminal serial number by judging this POS terminal is within the terminal serial number importing, thereby judge whether this POS terminal is the POS terminal that belongs to phase acquirer, POS terminal downloads master key to the acquirer under key downloader, therefore effectively prevents that master key from downloading in the POS terminal of non-acquirer.
The foregoing is only embodiments of the invention; not thereby limit the scope of the claims of the present invention; every equivalent structure or conversion of equivalent flow process that utilizes instructions of the present invention and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.

Claims (7)

1. a method for secure download terminal master key, is characterized in that, comprises step:
S1, the generation of key downloader or importing secret key are to private key Pu, PKI Pr;
S2, key downloader produce or import terminal master key TMK;
S3, key downloader use private key Pr to encrypt terminal master key TMK and generate master key ciphertext Ctmk;
S4, key downloader are sent to POS terminal by PKI Pu and master key ciphertext Ctmk;
S5, the POS terminal Pu deciphering master key ciphertext Ctmk that uses public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
2. the method for secure download terminal master key according to claim 1, is characterized in that, specifically comprises step:
S1, key downloader produce or import public private key pair private key Pr and PKI Pu, and PKI Pu is issued to CA center, CA center generates acquirer root certificate AcquireRCRT and corresponding private key AcquireRCRT_Prk, uses AcquireRCRT_Prk signature to generate acquirer work certificate AcquireWCRT the Pu receiving;
Key downloader is stored described work certificate AcquireWCRT and private key AcquireWCRT_Prk;
Acquirer root certificate AcquireRCRT described in POS terminal storage;
S2, key downloader produce or import terminal master key TMK;
S3, key downloader use private key Pr to encrypt terminal master key TMK and generate master key ciphertext Ctmk;
S4, key downloader are sent to POS terminal by acquirer work certificate AcquireWCRT and master key ciphertext Ctmk, POS terminal is used the legitimacy of acquirer root certificate AcquireRCRT authentication acquirer work certificate AcquireWCRT, if it is legal to authenticate, from acquirer work certificate AcquireWCRT, extract Pu;
S5, the POS terminal Pu deciphering master key ciphertext Ctmk that uses public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
3. the method for secure download terminal master key according to claim 1 and 2, is characterized in that, POS terminal is set up wire communication with key downloader and is connected, and described wire communication is connected to serial ports connection or USB connects.
4. the method for secure download terminal master key according to claim 3, is characterized in that, concrete steps comprise:
S1, by all terminal serial number SN importing secret key downloaders that need to download the POS terminal of master key TMK, key downloader produce or importing secret key to private key Pu, PKI Pr;
S2, key downloader produce or import terminal master key TMK correspondingly according to each terminal serial number SN;
S3, POS terminal are set up wire communication with key downloader and are connected, and terminal serial number SN and master key download request are sent to key downloader, key downloader verifies whether the terminal serial number SN of this POS terminal is present in the terminal serial number SN importing in step S1, after being verified, key downloader uses private key Pr to encrypt terminal master key TMK and generates master key ciphertext Ctmk;
S4, key downloader are sent to POS terminal by PKI Pu and master key ciphertext Ctmk;
S5, the POS terminal Pu deciphering master key ciphertext Ctmk that uses public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
5. a system for secure download terminal master key, is characterized in that, comprises key downloader and POS terminal; Described key downloader comprises key generation module, master key generation module, encrypting module, master key sending module,
Described POS terminal comprises master key receiver module;
Described key generation module for generation of or importing secret key to private key Pu, PKI Pr;
Described master key generation module for generation of or import terminal master key TMK;
Described encrypting module is used for using private key Pr to encrypt terminal master key TMK generation master key ciphertext Ctmk;
Described master key sending module is for being sent to POS terminal by PKI Pu and master key ciphertext Ctmk;
The described master key receiver module Pu deciphering master key ciphertext Ctmk that is used for using public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
6. the system of secure download terminal master key according to claim 5, is characterized in that, also comprises CA center;
Described CA center comprises certificate preset module;
Described key generation module for generation of or import public private key pair private key Pr and PKI Pu, and PKI Pu is issued to CA center; Described certificate preset module is used for generating acquirer root certificate AcquireRCRT and corresponding private key AcquireRCRT_Prk, uses AcquireRCRT_Prk signature to generate acquirer work certificate AcquireWCRT the Pu receiving; And for described work certificate AcquireWCRT and private key AcquireWCRT_Prk are stored in to key downloader, described acquirer root certificate AcquireRCRT is stored in to POS terminal;
Described master key generation module for generation of or import terminal master key TMK;
Described encrypting module is used for using private key Pr to encrypt terminal master key TMK generation master key ciphertext Ctmk;
Described master key sending module is for being sent to POS terminal by acquirer work certificate AcquireWCRT and master key ciphertext Ctmk; Described master key receiver module is used for using the legitimacy of acquirer root certificate AcquireRCRT authentication acquirer work certificate AcquireWCRT, and for when described authentication is legal, from acquirer work certificate AcquireWCRT, extracts Pu;
The master key receiver module Pu deciphering master key ciphertext Ctmk that is used for using public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
7. the system of secure download terminal master key according to claim 5, is characterized in that, described key downloader also comprises importing module,
Described POS terminal also comprises download request module;
Described importing module is used for all terminal serial number SN importing secret key downloaders that need to download the POS terminal of master key TMK;
Described key generation module for generation of or importing secret key to private key Pu, PKI Pr;
Described master key generation module is for producing correspondingly or import terminal master key TMK according to each terminal serial number SN;
Described download request module, for setting up wire communication while being connected with key downloader, sends to key downloader by terminal serial number SN and master key download request; Described encrypting module imports for verifying whether the terminal serial number SN of POS terminal is present in the terminal serial number SN that module imports, and for after being verified, using private key Pr to encrypt terminal master key TMK and generate master key ciphertext Ctmk;
Described master key sending module is for being sent to POS terminal by PKI Pu and master key ciphertext Ctmk;
The described master key receiver module Pu deciphering master key ciphertext Ctmk that is used for using public-key obtains terminal master key TMK, and terminal master key TMK is stored to code keypad.
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CN2013100846538A CN103237005A (en) 2013-03-15 2013-03-15 Method and system for key management
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CN2013100843972A CN103237004A (en) 2013-03-15 2013-03-15 Key download method, key management method, method, device and system for download management
CN2013100846716A CN103220270A (en) 2013-03-15 2013-03-15 Downloading method, management method, downloading management method, downloading management device and downloading management system for secret key
CN2013100846735 2013-03-15
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CN2013100846735A CN103220271A (en) 2013-03-15 2013-03-15 Downloading method, management method, downloading management method, downloading management device and downloading management system for secret key
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CN201310742681.4A Active CN103714640B (en) 2013-03-15 2013-12-27 A kind of sending method of transmission security key and system
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CN201310741948.8A Active CN103714639B (en) 2013-03-15 2013-12-27 A kind of method and system that realize the operation of POS terminal security
CN201310740540.9A Active CN103716154B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
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CN201310742686.7A Active CN103745351B (en) 2013-03-15 2013-12-27 A kind of acquisition method and system for transmitting cipher key T K
CN201310742886.2A Active CN103716321B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
CN201310740642.0A Active CN103731259B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
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CN201310740226.0A Active CN103714634B (en) 2013-03-15 2013-12-27 A kind of method of main key of secure download terminal and system
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CN201310740158.8A Active CN103716320B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
CN201310740537.7A Active CN103746800B (en) 2013-03-15 2013-12-27 TMK (terminal master key) safe downloading method and system
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CN201310740430.2A Active CN103729943B (en) 2013-03-15 2013-12-27 A kind of method and system transmission security key being imported KMS system
CN201310740264.6A Active CN103701812B (en) 2013-03-15 2013-12-27 TMK (Terminal Master Key) secure downloading method and system
CN201310740644.XA Active CN103714638B (en) 2013-03-15 2013-12-27 A kind of method and system of quick position terminal master key failed download
CN201310740244.9A Active CN103701609B (en) 2013-03-15 2013-12-27 A kind of server and the method and system operating terminal two-way authentication
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CN201310742713.0A Active CN103701610B (en) 2013-03-15 2013-12-27 A kind of acquisition method and system for transmitting cipher key T K
CN201310740188.9A Active CN103716153B (en) 2013-03-15 2013-12-27 Terminal master key TMK safety downloading method and systems
CN201310740360.0A Active CN103714636B (en) 2013-03-15 2013-12-27 A kind of method of batch capture and upload transfers cipher key T K data and operating terminal
CN201310741948.8A Active CN103714639B (en) 2013-03-15 2013-12-27 A kind of method and system that realize the operation of POS terminal security
CN201310740540.9A Active CN103716154B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
CN201310740285.8A Active CN103729940B (en) 2013-03-15 2013-12-27 A kind of main cipher key T MK method for safely downloading of terminal and system
CN201310742686.7A Active CN103745351B (en) 2013-03-15 2013-12-27 A kind of acquisition method and system for transmitting cipher key T K
CN201310742886.2A Active CN103716321B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
CN201310740642.0A Active CN103731259B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
CN201310740100.3A Active CN103714633B (en) 2013-03-15 2013-12-27 A kind of method of safe generating transmission key and POS terminal
CN201310740574.8A Active CN103729945B (en) 2013-03-15 2013-12-27 A kind of method and system of secure download terminal master key
CN201310742991.6A Active CN103714641B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK method for safely downloading and system
CN201310742661.7A Active CN103716167B (en) 2013-03-15 2013-12-27 Method and device for safely collecting and distributing transmission keys
CN201310740231.1A Active CN103714635B (en) 2013-03-15 2013-12-27 A kind of POS terminal and terminal master key downloading mode collocation method thereof
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CN201310740158.8A Active CN103716320B (en) 2013-03-15 2013-12-27 A kind of terminal master key TMK safety downloading method and systems
CN201310740537.7A Active CN103746800B (en) 2013-03-15 2013-12-27 TMK (terminal master key) safe downloading method and system
CN201310740567.8A Active CN103729944B (en) 2013-03-15 2013-12-27 A kind of method and system of secure download terminal master key
CN201310742648.1A Active CN103716155B (en) 2013-03-15 2013-12-27 A kind of method of automated maintenance POS terminal and operation terminal
CN201310740430.2A Active CN103729943B (en) 2013-03-15 2013-12-27 A kind of method and system transmission security key being imported KMS system
CN201310740264.6A Active CN103701812B (en) 2013-03-15 2013-12-27 TMK (Terminal Master Key) secure downloading method and system
CN201310740644.XA Active CN103714638B (en) 2013-03-15 2013-12-27 A kind of method and system of quick position terminal master key failed download
CN201310740244.9A Active CN103701609B (en) 2013-03-15 2013-12-27 A kind of server and the method and system operating terminal two-way authentication
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