blacklist processing method and system based on a POS machine

Abstract

The invention discloses a blacklist processing method based on a POS machine, and the method comprises the steps: receiving a transaction request, converting the transaction request into a transactioninstruction, and sending the transaction instruction to the POS machine; The POS machine reads the card number and returns the card number to the client; Judging whether the card number exists in a blacklist or not, and if yes, terminating the transaction; And if not, sending a transaction continuing instruction to the POS machine. The invention further discloses a blacklist processing system based on the POS machine. The blacklist processing system comprises a transaction request module, a card number reading module and a card number judging module. The blacklist downloading and judgment mechanism is independently opened, downloading and judgment problems of mass blacklists are solved, the judgment accuracy is improved, and the efficiency is greatly improved by using a dichotomy to search in the ordered sequence.

Description

technical field [0001] The invention relates to the technical field of data processing, in particular to a POS machine-based blacklist processing method and system thereof. Background technique [0002] As prepaid card issuance has risen exponentially, so has the number of lost cards. After the user's card is lost, he will report the loss to the card issuer, and then the reported card will refuse transactions (enter the blacklist) on all terminals. [0003] Due to the huge number of loss reports and their rapid growth, the storage space of traditional terminal devices (POS machines or PIN pads and other card-swiping devices) is too small to store them; In addition, every time the blacklist is downloaded, several batches are downloaded through the ISO8583 standard protocol, and the speed is very slow. [0004] Disadvantages of traditional POS machine workflow: [0005] 1. Downloading the blacklist requires the support of the ISO8583 protocol. There are a large number of he...

AI Technical Summary

Problems solved by technology

[0005] 1. Downloading the blacklist requires the support of the ISO8583 protocol. There are a large number of headers and unnecessary fields, which will occupy a large amount of unnecessary traffic bandwidth, resulting in a large bandwidth required by the terminal. If the bandwidth is insufficient, the speed will be very slow;

[0006] 2. In addition to the large traffic, the ISO8583 protocol has a maximum limit. One message exchange can only download one batch (up to about 19 blacklist records). To download hundreds of thousands of records, several interactions are required;

[0007] 3. In order to solve the above shortcomings, the traditional POS machine adopts the "incremental update" method, that is, only the updated part is downloaded each time. Although this solves the problem of real-time update efficiency, it cannot solve the speed of new machine update (every time) A new device will take a lot of time to update the blacklist for the first time);

[0008] 4. Because it is incremental, it cannot be sorted, and the downloaded blacklist data is out of order. Every blacklist judgment needs to traverse the entire record, which is very time-consuming and the user experience is also very poor;

[0009] 5. Since it is incremental, it cannot be deduplicated, which may result in several identical data in the blacklist file;

[0010] 6. Unable to solve the storage problem of POS machine after the explosive growth of blacklist

Images