Home / Standards / GB/T 40949-2021 GB/T 40949-2021 Active Digital rights management—Specification for trusted counting technology 数字版权保护 可信计数技术规范 Standard Type GBT ICS 01.140.40 CCS A19 Status 现行 Issue Date 2021-11-26 Implementation 2022-06-01 Responsible Dept 国家新闻出版署(国家版权局) Drafting Unit N/A