Home / Standards / GB/T 31503-2015 GB/T 31503-2015 Abolished Information security technology—Encryption and signature message syntax for electronic document 信息安全技术 电子文档加密与签名消息语法 Standard Type GBT ICS 35.040 CCS L80 Status 废止 Issue Date 2015-05-15 Implementation 2016-01-01 Responsible Dept 国家标准委 Drafting Unit N/A