GB/T 39465-2020 in English

VALID

Card of smart city union—Interface for charging data

Issued on:2020-11-19
Implemented on:2021-06-01
File Format:PDF
Delivery:Via email within 1~3 business days

Price(USD)： $250.00
$243.00

Standard No:	GB/T 39465-2020
Document status:	VALID
Title in English:	Card of smart city union—Interface for charging data
Title in Chinese:	城市智慧卡互联互通充值数据接口
Language:	English
File Format:	Electronic (PDF)
Delivery:	Via email within 1~3 business days
Issued on:	2020-11-19
Implemented on:	2021-06-01
ICS Classification:	35.240-Applications of information technology
Chinese Classification:	L65-System equipment interface
Professional Classification:	GB-National Standard
Related Keywords:	city card platform smart city union interface ic card interface compatibility support standard general requirements
Related Topics:	General technical requirements for digital city card interconnection All-in-one card interconnection technology digital city interconnection Digital city card interconnection value General technical requirements for digital city card interconnection Digital City Card General technical requirements for digital city card interconnection data card value data data card interconnection GBT39465 GB/T 39465-2020 Data communication interface HDMI Standard interconnection Smart city IoT sensing data access

《GB/T 39465-2020城市智慧卡互联互通充值数据接口》由TC426（全国智能建筑及居住区数字化标准化技术委员会）归口，主管部门为住房和城乡建设部。

Introduction

Analysis of the core content of the standard

Technical dimensions	Requirements of this standard	General requirements of the industry
Message security	SM2/RSA/MD5 triple signature mechanism	Usually only a single encryption algorithm is used
Interface compatibility	Support four modes of APP/self-service terminal/eSE/HCE	Generally only 2-3 terminal types are supported
Exception handling	Transaction counter comparison + MAC double verification	Most standards do not specify specific verification methods

Key technology implementation

The standard adopts a layered security architecture:

IC card generates a transaction verification code (TAC)
The transport layer uses the SM2 algorithm for signature
RSA key exchange is used between platforms

Typical application case: When a city card platform is connected to the Alipay recharge function, it must strictly follow the JSON message format definition in Section 6.3 of the standard, and pay special attention to the instruction sequence encapsulation requirements of the APDUset field.

Implementation Suggestions

Key points of system connection:

The recharge terminal needs to be pre-installed with the public key certificate issued by the Tongka platform
The naming of the daily reconciliation file must comply with the 8-digit institution code rule in Section 10.4.2
Abnormal transactions need to retain the original MAC value for error handling

Version evolution: Based on the general technical requirements of GB/T 31778-2015, this standard focuses on strengthening the following:

HCE wallet support in mobile payment scenarios
Secure transmission requirements based on national encryption algorithms
Unified specification of multi-terminal instruction sets

More samples: YD/T 3934-2021 GB 18306-2015 NB/T 47013.2-2015

Sample only — not a preview of GB/T 39465-2020

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