LD/T 01.2-2022 in English
VALIDHuman Resources and Social Security Electronic Seal System Part 2:Technical Specification of the Seal
- Issued on:2022-03-23
- Implemented on:2022-06-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$388.00
| Standard No: | LD/T 01.2-2022 |
| Document status: | VALID |
| Title in English: | Human Resources and Social Security Electronic Seal System Part 2:Technical Specification of the Seal |
| Title in Chinese: | 人力资源社会保障电子印章体系 第2部分：印章技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 1~3 business days |
| Issued on: | 2022-03-23 |
| Implemented on: | 2022-06-01 |
| ICS Classification: | 35.040-Character sets and information coding |
| Chinese Classification: | L80-Data encryption |
| Professional Classification: | LD-Labor and Safety |
| Related Topics: | seal
social Security ld/t Electronic seal Electronic seal Electronic seal system |
本文件规定了人力资源社会保障电子印章的数据格式和电子印章的生成、验证流程、数据格式、数据结构、印章信息。
本文件适用于人力资源社会保障电子印章系统的建设、使用和各地区人力资源社会保障电子印章系统的接入。
Introduction
Analysis of the core architecture of the standard
This specification adopts PKI public key cryptography technology and digital image processing technology, and uses SM2 algorithm signature and SM3 hash algorithm to ensure the electronic seal's:
- Authenticity (verifiable seal source)
- Integrity (tamper-proof protection)
- Non-repudiation (traceability of signature behavior)
Electronic seal data structure
| Data domain | ASN.1 definition | Key requirements |
|---|---|---|
| Seal information | SES_SealInfo | Contains a unique identifier for the unified social credit code + a 3-digit serial number |
| Seal making system certificate | OCTET STRING | DER encoding format, in compliance with GB/T 20518 |
| Signature algorithm identifier | 1.2.156.10197.1.501 | Fixed SM2withSM3 encryption identifier |
Seal image technical specifications
Standard requirements for electronic seal images:
- Format requirements: Supports PNG/BMP/SVG and other formats, and uses PNG8 format (2 colors, 600DPI) for filing
- Dimensioning: Definition of width and height accurate to millimeter level (width/height fields)
- Ethnic compatibility: Support ethnic minority scripts through the sealHoldingUnitEthnicMinoritiesName field
Implement key processes
Seal generation process
- Coding by superior departments (cross-industry mutual recognition scenario)
- Construct seal information domain in ASN.1 format
- SM2 algorithm signature operation generates signature value
- Data packaging forms the final electronic seal
Five-step verification mechanism
| Steps | Verification content | Failure handling |
|---|---|---|
| 1 | Data structure compliance | Terminate and return format error |
| 2 | SM2 signature validity | Terminate and return invalid signature |
| 3 | Online status query | Check revocation list |
Standard evolution and government connection
This specification adopts:
- References to 5 national standards including ZWFWC 0119-2018 to achieve connection with the national government service platform
- Modular design (4 parts in total) is adopted to facilitate subsequent revisions
- Reserved extension fields support scenarios such as minority languages and English names
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