Standard No.:	GB/T 31308.4-2023
English Name:	Processes|| data elements and documents in commerce|| industry and administration—Long term signature—Part 4: Attributes pointing to proof of existence objects used in long term signature formats
Chinese Name:	行政、商业和行业中的数据元、过程和文档 长效签名 第4部分：用于长效签名格式的存证对象属性
Chinese Classification:	L79    Opening and system interconnection of computer
Professional Classification:	GB    National Standard
ICS Classification:	35.240.60 35.240.60    IT applications in transport and trade 35.240.60
Issued by:	SAMR; SAC
Issued on:	2023-12-28
Implemented on:	2024-4-1
Status:	valid
Language:	English
File Format:	PDF
Word Count:	20000 words
Price(USD):	600.00
Delivery:	via email in 1~5 business day

本文件规定了用于长效签名格式的存证（PoE, Proof of existence）属性和对象，描述了PoE基本概念、属性特征，给出了PoE对象的类型、基本字段，以及相关实例。
本文件适用于长效签名格式中所使用的（外部）存证对象，即通过既存可用的数字签名和可信时间值实现长效签名的动态验证。