保存到DB的PDF丢失了其数字签名

问题描述

我设法在SQL 2008数据库的BLOB字段中上载并保存了经过数字签名的PDF.我去查看它，签名消失了.有人知道为什么吗?

I have managed to upload and save a digitally signed PDF in a BLOB field in my SQL 2008 database. I go to view it and the signature is gone. Does anyone know why?

推荐答案

1. 签名是存储在硬盘驱动器其他位置的文件.
2. 签名可能存储在(备用数据流).

1. The signature is a file stored elsewhere on the hard drive. Perhaps an entry in a certificate store.
2. The signature is something that is stored in the ADS (alternate data stream) of the file.

这篇关于保存到DB的PDF丢失了其数字签名的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！