JP3250610B2 - How to get fund transfer information - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the acquisition of data required for reliability used in electronic transactions, and more particularly to a method of acquiring funds transfer destination information in a bank that transfers funds.

[0002]

2. Description of the Related Art Conventionally, there is known a technique for securing electronic transactions by using an encryption key.

[0003] For example, Japanese Patent Publication No. 60-1628 ("Confidential transmission system for electronic funds transfer")
Discloses a system for secretly transmitting a message including a transaction date, a transaction amount, an account number, and a retail store company.

Japanese Patent Application Laid-Open No. Sho 60-61863 ("Encryption Key Management Method and System") discloses that a central host generates a master key and, under the master key, a secondary key of a transaction card issuing organization. A deriving system is disclosed.

Japanese Patent Application Laid-Open No. Hei 7-234904 (“Method of Performing Non-Cash Transactions”) discloses that in a transaction using a credit card, a bank is required to verify the identity of a cardholder who is a customer. Methods are disclosed for receiving personal information and using this information to ask one or more questions.

[0006]

However, in order for a customer bank to transfer funds to a dealer bank, for example, 1
In the SECE payment and settlement (bank transaction) protocol specification on December 3, 997, the store account information is acquired as follows.

[0007] (1) The dealer informs the customer of the dealer's account information during the commercial transaction.

(2) The customer includes the notified store account information in the data sent to the customer bank by the customer.

(3) The store includes the store account information in the data sent to the customer bank.

[0010] That is, the customer transaction bank obtains the store account information as the fund transfer destination information according to (2) and (3). In addition, this protocol includes the store account information in the store certificate to increase the reliability of the information. Therefore, under the above protocol, confidentiality of information is an issue, and by including the store account information in the store certificate as it is, the store account information can be transmitted to a third party unrelated to the commercial transaction with the store. Be published.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system in which a customer's bank can confirm fund transfer destination information without revealing the fund transfer destination information.

Another object of the present invention is to provide a system that allows a store to select fund transfer destination information from a plurality of accounts.

[0013]

SUMMARY OF THE INVENTION The present invention for solving the above-mentioned problems is a method of acquiring fund transfer destination information using a data registration system, a database system, and a data request system.

In the present invention, when using the common key encryption method, the data registration system encrypts registration data including at least a pair of a store ID and a store account number using a key agreed with the database system. And send it,
The database system decrypts and stores the registration data using a key corresponding to the key. The data request system requests the database system for conversion data including at least a pair of a store ID and a store account number, and the database system accepts a request from the data request system and stores the stored data. The converted data is extracted, encrypted using a key agreed with the data requesting system, and transmitted, and the data requesting system decrypts the converted data using a key corresponding to the key.

Further, in the present invention, when using the public key encryption method, the data registration system stores the registration data including at least the pair of the store ID and the store account number with the key agreed with the database system. Applying an electronic signature, encrypting and transmitting, the database system,
The received data is decrypted using the keys corresponding to the respective keys, the signature is verified, and the data is stored. The data request system requests the database system for conversion data including at least a pair of a store ID and a store account number, and the database system accepts a request from the data request system and stores the stored data. Taking the converted data, applying an electronic signature using a key agreed with the data request system, encrypting and transmitting the data, the data request system performs the conversion using a key corresponding to each of the keys. Decrypt the data and verify the signature.

In the present invention, when the data requesting system has store account information and confirms the validity of the information, the data registration system includes at least the store ID.
And the registration data including the digest of the store account number and the digest algorithm are electronically signed using a key agreed with the database system and transmitted, and the database system uses the key corresponding to the key to transmit the data. Verify and store the signature of the registration data. Also, the data request system requests the database system for conversion data including at least a digest of a store ID and a store account number and a digest algorithm, and the database system accepts a request from the data request system, and Retrieve the converted data to be stored, send an electronic signature using a key agreed with the data request system, and transmit the data,
The electronic signature of the conversion data is verified using a key corresponding to the key, a digest of a store account number given from the outside is created using the digest algorithm, and the digest matches the digest of the store account number. Confirm whether or not.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

First, an embodiment in which a common key encryption method is used will be described.

Referring to FIG. 1, in an embodiment of the present invention, a data registration system 1 for registering data including a pair of a store ID and a store account number to provide to a customer bank, and a store The system includes a data request system 2 for acquiring data necessary for converting an ID into a store account number, and a database system 3 for managing data including a pair of a store ID and a store account number.

The data registration system 1 includes a registration data encryption unit 7, a common key A8, and a registration unit sending unit 9.

The registration data encrypting means 7 encrypts registration data including a pair of a store ID and a store account number.

The common key A8 is a key previously agreed with the database system 3.

The registered data sending means 9 transmits the data passed from the registered data encrypting means 7 to the database system 3.
Send to

The data request system 2 includes a converted data requesting unit 11, a converted data receiving unit 12, a converted data decrypting unit 13, and a common key B14.

The conversion data requesting means 11 sends the store ID to the database system 3.

The conversion data receiving means 12 receives the encrypted data including the pair of the store ID and the store account number from the database system 3.

The converted data decrypting means 13 decrypts the encrypted data passed from the converted data receiving means 12.

The common key B14 is stored in the database system 3
Is a key agreed in advance between

The database system 3 includes a registered data receiving unit 16, a registered data decrypting unit 17, a common key A18,
Conversion data management means 19, conversion data request receiving means 2
0, a conversion data encryption unit 21, a common key B22, and a conversion data transmission unit 23.

The registration data receiving means 16 receives the encrypted data including the pair of the store ID and the store account number from the data registration system 1.

The registered data decrypting means 17 decrypts the encrypted data passed from the registered data receiving means 16 and passes it to the converted data managing means 19.

The common key A 18 is a key previously agreed with the data registration system 1.

The conversion data management means 19 stores data including a pair of a store ID and a store account number, which is passed from the registered data decrypting means 17. Further, the store ID is received from the conversion data request receiving means 20, and the store ID is received.
And the data conversion data encryption means 21 including the pair of the store account number.

The conversion data request receiving means 20 receives the store ID from the data request system 2 and passes it to the conversion data management means 19.

The converted data encrypting means 21 encrypts the data passed from the converted data managing means 19 and including the pair of the store ID and the store account number.

The common key 22 is a key previously agreed with the data request system 2.

The converted data sending means 23 sends the data passed from the converted data encrypting means 21 to the data request system 2.

Next, an embodiment in which a public key encryption method is used will be described. When using the public key method,
An electronic signature is required so that the recipient can confirm the validity of the data sender.

Referring to FIG. 3, data registration system 1
Is replaced with a key exchange public key C26, the common key B of the data request system 2 is replaced with a key exchange secret key B27, the common key A of the database system 3 is replaced with a key exchange secret key C30, The key B differs from FIG. 1 in that the key B is replaced with a key exchange public key B35.

The data registration system 1 has a registered data signature means 24 and a signature key A25, and the data request system 2 has a converted data signature verification means 28 and a signature verification key C
1 in that the database system 3 includes a registered data signature verification unit 31, a signature verification key A32, a converted data signature unit 33, and a signature key C34.

The registration data signature means 24 digitally signs the data including the pair of the store ID and the store account number passed from the in-bank data management means 6 using the signature key A25.

The signature key A25 is a secret key known only to the data registration means 1.

The registration data encryption means 7 converts the data passed from the registration data signature means 24 into a key exchange public key C26.
And passes it to the registration data sending means 9.

The key exchange public key C26 is a public key corresponding to the key exchange private key C30 known only by the database system 3.

The converted data decrypting means 13 decrypts the encrypted data passed from the converted data receiving means 12 using the key exchange secret key B27.

The key exchange secret key B27 is a secret key known only to the data request system 2.

The converted data signature verifying means 28 verifies the electronic signature of the data passed from the converted data decrypting means 13 using the signature verification key C29.

The signature verification key C29 is a public key corresponding to the signature key C34 known only by the database system 3.

The registered data decrypting means 17 decrypts the encrypted data passed from the registered data receiving means 16 using the key exchange secret key C30.

The key exchange secret key 30 is a secret key known only to the database system. Registration data signature verification means 3
1 verifies the electronic signature of the data passed from the registered data decrypting means 17 using the signature verification key A32.

The signature verification key C32 is a public key corresponding to the signature key A25 known only by the data registration system 1.

The conversion data management means 19 stores data including a pair of a store ID and a store account number passed from the registered data signature verifying unit 31. Further, it receives the store ID from the conversion data request receiving means 20 and passes it to the data conversion data signing means 33 including the pair of the store ID and the store account number.

The conversion data signing means 33 digitally signs the data including the pair of the store ID and the store account number passed from the conversion data management means 19 using the signature key C34.

The signature key C34 is stored in the database system 3
Only the secret key that is known.

The converted data encryption means 21 converts the data passed from the converted data signature means 33 into a key exchange public key B35.
And encrypt it.

The key exchange public key B35 is a public key corresponding to the key exchange secret key B27 known only to the data request system 2.

Finally, an embodiment in which the data request system has store account information and checks the validity of the information will be described in detail with reference to the drawings.

Referring to FIG. 4, since data encryption is not required in the present embodiment, data registration system 1 does not have registered data encryption means 7 and key exchange public key C26.
The data request system 2 does not have the converted data decryption means 13 and the key exchange secret key B27, and the database management system 3 has the registered data decryption means 17, the key exchange secret key C30,
3 in that it does not have the converted data encryption means 21 and the key exchange public key B35.

The data registration system 1 has an account number hash means 36 and a registered data creation means 37, and the data request system 2 has an account number hash means 38, an account number digest storage means 39, an account number digest comparison means. The difference from FIG.

The account number hashing means 36 generates a digest of the store account number passed from the in-bank data management means 6.

The registration data creating means 37 registers the registration data (FIG. 5) from the store ID passed from the in-bank data management means 6 and the digest of the store account number and the digest algorithm passed from the account number hashing means 36. Generate

The registration data signature unit 24 digitally signs the registration data passed from the registration data creation unit 37 using the signature key A25.

The registration data sending means 9 transmits the registration data with the electronic signature passed from the registration data signature means 24 to the line 4
Through to the database system 3.

The conversion data management means 19 stores the registration data (FIG. 5) composed of the store ID, the digest of the store account number, and the digest algorithm passed from the registration data signature verification means 31. Also, a store ID is received from the conversion data request receiving means 20,
The conversion data (FIG. 5) including the digest of the store ID and the store account number and the digest algorithm are passed to the conversion data signature means 33.

The conversion data receiving means 12 receives the conversion data with the electronic signature transmitted from the conversion data sending means 23 through the line 5 and passes it to the conversion data signature verification means 28.

The conversion data signature verification unit 28 verifies the electronic signature of the conversion data with the electronic signature, which is passed from the conversion data reception unit 12, using the signature verification key C29, and converts the digest algorithm in the conversion data into the account number hashing unit. At 38, the digest of the store account number is passed to the account number digest storage means 39.

The account number hashing means 38 hashes the store account number passed from the conversion source data input means 10 using the digest algorithm passed from the converted data signature verification means 28.

The account number digest storage unit 39 stores the digest of the store account number passed from the converted data signature verification unit 28.

The account number digest comparing means 40 determines whether or not the digest of the store account number passed from the account number hash means 38 matches any of the digests of the store account numbers passed from the account number digest storage means 39. And verifies the verification result into data conversion means 1.
Pass to 5.

Next, a case will be described in which data (FIG. 2) including a pair of a store ID and a store account number is registered using a common key encryption method.

The registration data encryption means 7 stores the data including the pair of the store ID and the store account number passed from the in-bank data management means 6 with the common key A8 which has been agreed with the database system 3 in advance. Then, it is transmitted to the registered data transmitting means 9.

The registered data transmitting means 9 transmits the data passed from the registered data encrypting means 7 to the database system 3 via the line 4.

The registered data receiving means 16 receives the data transmitted from the registered data transmitting means 9 via the line 4 and passes the data to the registered data decoding means 17.

The registered data decrypting means 17 decrypts the data passed from the registered data receiving means 16 using the common key A18 previously agreed with the data registration system 1,
It is passed to the conversion data management means 19.

Next, acquisition of data including a pair of a store ID and a store account number using the common key encryption method will be described.

The conversion data requesting means 11 transmits the store ID passed from the conversion source data input means 10 to the database system 3 via the line 5.

The conversion data request accepting means 20 transmits the converted data from the store I transmitted from the conversion data requesting means 11 through the line 5.
D is received and passed to the conversion data management means 19.

The conversion data management means 19 transfers the conversion data including the pair of the store ID and the store account number passed from the conversion data request receiving means 20 to the conversion data encryption means 21.

The conversion data encryption means 21 converts the conversion data including the pair of the store ID and the store account number passed from the conversion data management means 19 into a common key which has been agreed with the data request system 2 in advance. The data is encrypted using B22 and passed to the conversion data sending means 23.

The converted data transmitting means 23 transmits the data passed from the converted data encrypting means 21 to the data request system 2 via the line 5.

The converted data receiving means 12 receives the data transmitted from the converted data sending means 23 through the line 5 and passes the data to the converted data decoding means 13.

The converted data decrypting means 13 decrypts the data passed from the converted data receiving means 12 using the common key B14 agreed in advance with the database system 3 and passes the data to the data converting means 15.

Next, an operation for registering data (FIG. 2) including a pair of a store ID and a store account number using a public key encryption method will be described.

The registration data signature means 24 digitally signs the data including the pair of the store ID and the store account number passed from the in-bank data management means 6 using the signature key 25 known only by the data registration system 1. And passes it to the registered data encryption means 7.

The registered data encrypting means 7 encrypts the signed data passed from the registered data signing means 24 using the key exchange public key C26 of the database system 3 in advance, and passes the data to the registered data sending means 9.

The registered data transmitting means 9 transmits the data passed from the registered data encrypting means 7 to the database system 3 via the line 4.

The registered data receiving means 16 receives the data transmitted from the registered data transmitting means 9 via the line 4 and passes the data to the registered data decoding means 17.

The registered data decrypting means 17 decrypts the data passed from the registered data receiving means 16 using the key exchange secret key C30, and passes the data to the registered data signature verifying means 31.

The registered data signature verifying means 31 verifies the signature of the data passed from the registered data decrypting means 17 using the signature verification key A32, and then converts the data including the pair of the store ID and the store account number. The data is passed to the data management means 19.

Next, acquisition of data including a pair of a store ID and a store account number using a public key encryption method will be described.

The conversion data requesting means 11 transmits the store ID passed from the conversion source data input means 10 to the database system 3 via the line 5.

The conversion data request receiving means 20 stores the sales data of the store I transmitted from the conversion data request means 11 through the line 5.
D is received and passed to the conversion data management means 19.

The conversion data management means 19 passes the conversion data including the pair of the store ID and the store account number passed from the conversion data request receiving means 20 to the conversion data signing means 33.

The conversion data signature unit 33 converts the conversion data containing the pair of the store ID and the store account number passed from the conversion data management unit 19 into an electronic signature using the signature key 34 known only by the database system 3. And passes it to the converted data encryption means 21.

The converted data encryption means 21 encrypts the signed data passed from the converted data signature means 33 using the key exchange public key B35 of the data request system 2,
It is passed to the conversion data sending means 23.

The converted data transmitting means 23 transmits the data passed from the converted data encrypting means 21 to the data request system 2 via the line 5.

The converted data receiving means 12 receives the data transmitted from the converted data transmitting means 23 through the line 5 and passes the data to the converted data decoding means 13.

The converted data decrypting means 13 decrypts the data passed from the converted data receiving means 12 using the key exchange secret key B27 and passes the data to the converted data signature verifying means.

The conversion data signature verification unit 28 verifies the electronic signature of the data passed from the conversion data decryption unit 13 using the signature verification key C29, and then converts the data including the pair of the store ID and the store account number. The data is passed to the data conversion means 15.

Finally, the operation in the case where the data request system has store account information and confirms the validity of the information will be described.

The account number hashing means 36 generates a digest of the store account number passed from the in-bank data management means 6 and passes it to the registration data creating means 37.

The registration data creating means 37 registers the registration data (FIG. 5) from the shop ID passed from the in-bank data management means 6 and the digest of the shop account number passed from the account number hashing means 36 and the digest algorithm. Is generated and passed to the registered data signature means 24.

The registration data signature means 24 applies an electronic signature to the registration data passed from the registration data creation means 37 using the signature key A25 known only by the data registration system 1.
It passes to the registration data sending means 9.

The registration data sending means 9 transmits the registration data with the electronic signature passed from the registration data signature means 24 to the line 4
Through to the database system 3.

The registered data receiving means 16 receives the data with the electronic signature transmitted from the registered data transmitting means 9 via the line 4 and passes it to the registered data signature verifying means 31.

The registered data signature verifying means 31 verifies the signature of the data with the electronic signature passed from the registered data receiving means 16 by using the signature verification key A32, and then a digest of the store ID and the store account number and a digest. The registration data including the algorithm is passed to the conversion data management unit 19.

Next, a description will be given of the acquisition of conversion data including a digest of a store ID and a store account number and a digest algorithm.

The conversion data request unit 11 transmits the store ID passed from the conversion source data input unit 10 to the database system 3 via the line 5.

The conversion data request accepting means 20 transmits the converted data from the store I transmitted from the conversion data requesting means 11 through the line 5.
D is received and passed to the conversion data management means 19.

The conversion data management means 19 passes the conversion data comprising the store ID, the digest of the store account number, and the digest algorithm passed from the conversion data request receiving means 20 to the conversion data signature means 33.

The conversion data signature means 33 uses the signature key 34 known only by the database system 3 for the conversion data passed from the conversion data management means 19 and comprising the digest of the store ID and the store account number and the digest algorithm. Means for sending an electronic signature, and converting data sending means 2
Pass to 3.

The converted data sending means 23 sends the data passed from the converted data signature means 33 to the data request system 2 via the line 5.

The converted data receiving means 12 receives the data transmitted from the converted data sending means 23 through the line 5 and passes the data to the converted data signature verifying means 28.

The converted data signature verifying means 28 verifies the electronic signature of the data passed from the converted data receiving means 12 using the signature verification key C29, and then converts the digest algorithm in the converted data to the account number hashing means 38. The digest of the store account number is passed to the account number digest storage means 39.

The account number hash unit 38 hashes the store account number passed from the conversion source data input unit 10 using the digest algorithm passed from the converted data signature verification unit 28 and passes it to the account number digest comparison unit 40. .

The account number digest storage means 39 stores the digest of the store account number passed from the converted data signature verification means 28.

The account number digest comparing means 40 determines whether or not the digest of the store account number passed from the account number hash means 38 matches any of the digests of the store account numbers passed from the account number digest storage means 39. And verifies the verification result into data conversion means 1.
Pass to 5.

[0118]

According to the present invention described above, the store can realize the transfer request from the customer without making the store account number public. In addition, customer banks and dealer banks can confirm that the registration system is not spoofing, without using a special line, and access the dealer account information without giving it to third parties. can do.

[Brief description of the drawings]

FIG. 1 shows a store account number acquisition system using a common key encryption system.

[FIG. 2] Registration including a pair of a store ID and a store account number.
Conversion data.

FIG. 3 is a store account number acquisition method using a public key encryption method.

FIG. 4 is a method of confirming a store account number by digesting the store account number.

FIG. 5 is a registration / conversion data including a digest of a store ID and a store account number and a digest algorithm.

[Brief description of reference numerals]

DESCRIPTION OF SYMBOLS 1 Data registration system 2 Data request system 3 Database systems 8, 18, Common key A14, 2
2 Common key B 25 Signature key A 26 Key exchange public key C 27 Key exchange secret key B 29 Signature verification key C 30 Key exchange secret key 30 32 Signature verification key A 34 Signature key C 35 Key exchange public key B

Continuation of the front page (56) References JP-A-9-251494 (JP, A) JP-A-7-311806 (JP, A) JP-A-10-105783 (JP, A) JP-A-7-234904 (JP) JP-A-10-214288 (JP, A) Nozaki, Kimura, Ito, "Internet Security System", NEC Technical Report, Vol. 49, no. 7, July 30, 1996, p. 127-132 (58) Field surveyed (Int. Cl. ⁷ , DB name) G06F 17/60 G06F 19/00 G09C 1/00 JICST file (JOIS)

Claims (3)

(57) [Claims] 1. A common key for encrypting registration data including at least a pair of a store ID and a store account number, a registration data encryption unit for encrypting the registration data, and the registration data encryption unit A registration data transmitting unit for transmitting the encrypted registration data, a registration data receiving unit for receiving the encrypted registration data, and a registration data receiving unit for receiving the encrypted registration data. A common key for decrypting the encrypted registration data, a registration data decrypting means for decrypting the encrypted registration data passed from the registration data receiving means, at least a store ID and a store A conversion data request receiving means for receiving a request for conversion data including a pair of account numbers; a common key for encrypting the conversion data; Conversion data encryption means for encrypting the data, conversion data transmission means for transmitting the encrypted conversion data passed from the conversion data encryption means, and selling the registration data passed from the registration data decryption means. A database system comprising: a conversion data management unit that manages for each store bank; receives a request for the conversion data from the conversion data request reception unit; and passes the conversion data to the conversion data encryption unit. A conversion data requesting unit that requests data from the database system; a conversion data receiving unit that receives the encrypted conversion data from the database system; and a conversion data receiving unit that receives the encrypted conversion data from the conversion data receiving unit. A common key for decryption, and an encrypted key passed from the conversion data receiving means. The converted data to a fund transfer destination information acquisition method using a data requesting system that includes a conversion data decryption means for decrypting said data request system, at least the dealer ID
Requesting the conversion data including the pair of the account number and the store account number from the database system, the database system accepts a request from the data request system, retrieves the conversion data stored therein, And transmitting the encrypted data using the key agreed between the two, and the data requesting system decrypts the converted data using a key corresponding to the agreed key. . 2. A signature key for electronically signing registration data including at least a pair of a store ID and a store account number, a registration data signing unit for electronically signing the registration data, and an output from the registration data signing unit. key exchange public key for encrypting the signed the registration data, the signed the registration data and the registration data encryption means for encrypting is passed from the registered data encryption means, encrypted
A data registration system that includes a registration data transmission means for transmitting the signed the registration data, the registration data receiving means for receiving the signed the registration data that is encrypted and transferred from the enrollment data receiving means, Before encrypted
Serial key exchange private key to decrypt the signed the registration data, the passed from registration data receiving means, before encrypted
Registration data decoding means for decoding the serial signed the registration data, the passed from registration data decoding means, and the signature verification key for verifying the digital signature of the registration data is passed from the registered data decoding means, wherein Registration data signature verification means for verifying an electronic signature of registration data; conversion data request reception means for receiving a request for conversion data including at least a pair of a store ID and a store account number from a data request system to be described later; A signature key for electronically signing the conversion data, a conversion data signature unit for electronically signing the conversion data, a key exchange public key for encrypting the conversion data with a signature passed from the conversion data signature unit, Conversion data encryption means for encrypting the conversion data with a signature passed from the conversion data signature means, and the conversion data encryption means Conversion data transmitting means for transmitting encrypted signed conversion data passed from a stage; managing the registered data passed from the registered data signature verification means for each dealer bank; and receiving the converted data request receiving means A conversion data management unit that receives a request for the conversion data from the server and passes the conversion data to the conversion data signing unit; a conversion data requesting unit that requests the conversion data from the database system; Conversion data receiving means for receiving the converted data with a signature from the database system; a key exchange secret key for decrypting the encrypted signed conversion data passed from the conversion data receiving means; and the conversion data Conversion for decrypting the encrypted signed conversion data passed from the receiving means Data decryption means, a signature verification key for verifying an electronic signature of the conversion data with the signature passed from the conversion data decryption means, and a conversion for verifying the electronic signature of the conversion data with the signature passed from the conversion data decryption means A data transfer destination information acquisition method using a data request system including a data signature verification unit, wherein the data registration system includes at least the store ID.
And applying the electronic signature to the registration data including the pair of the store account number and a key agreed with the database system, encrypting the data, and transmitting the data. A method for acquiring funds transfer destination information, comprising decrypting using a key corresponding to each key, verifying and storing the signature. 3. A first account number hashing unit for creating a digest of a store account number, a registration data creating unit for creating registration data including a store ID, the store account number digest, and a digest algorithm; Data comprising a signature key for electronically signing the registration data, registration data signing means for electronically signing the registration data, and registration data sending means for transmitting signed registration data passed from the registration data signing means A registration system, registration data receiving means for receiving the signed registration data transmitted from the registration data sending means, and signature verification for verifying an electronic signature of the signed registration data passed from the registration data receiving means. Verifying a key and an electronic signature of the signed registration data passed from the registration data receiving means; Registration data signature verification means, conversion data request reception means for receiving a request for conversion data including at least a pair of a store ID and a store account number from a data request system described later, and a signature for electronically signing the conversion data A key, conversion data signing means for digitally signing the conversion data, conversion data sending means for transmitting the conversion data with a signature passed from the conversion data signature means, and the registration handing over from the registration data signature verification means A database system comprising: conversion data management means for managing data for each dealer bank; receiving a request for the conversion data from the conversion data request receiving means; and passing the conversion data to the conversion data signature means. A conversion data requesting unit for requesting the conversion data from the database system; A conversion data receiving unit that receives the conversion data from the database system; a signature verification key that verifies an electronic signature of the conversion data with the signature passed from the conversion data receiving unit; and a signature verification key that is passed from the conversion data receiving unit. A conversion data signature verification unit for verifying an electronic signature of the conversion data; a second account number hashing unit for generating a digest of a store account number using a digest algorithm passed from the conversion data signature verification unit; An account number digest storage unit that stores the digest of the store account number passed from the signature verification unit, and a digest of the store account number passed from the second account number hash unit and the account number digest storage unit is compared. Account number digest comparison means A fund transfer destination information acquisition method using the chromatography data requesting system, wherein the data request system has the dealer account information,
When confirming the validity of the information, the data registration system uses at least the store ID and the digest of the store account number and the registration data including the digest algorithm using the key agreed with the database system. An electronic signature is sent, and the database system verifies and stores the signature of the registration data using a key corresponding to the agreed key, and stores the information.