本文档指定了生成、更新和验证独立时间戳的机制。为了验证独立的时间戳令牌，时间戳验证器不需要访问任何其他时间戳令牌。也就是说，这样的时间戳标记没有链接。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies mechanisms that generate, renew, and verify independent time-stamps. In order to verify an independent time-stamp token, time-stamp verifiers do not need access to any other time-stamp tokens. That is, such time-stamp tokens are not linked.All current amendments available at time of purchase are included with the purchase of this document.