jsignpdf是一个Java应用，PDF文件添加数字签名。它可以作为一个独立的应用程序或作为添加在OpenOffice.org。jsignpdf是开源软件，可以自由使用私人和商业部门。
特征：
可见的签名图像和/或描述位于视觉上可在一个PDF文件（网页和位置可以指定）
几种不同类型的密钥（通过Java提供）
从权威在签名时间戳（TSA）
证书验证通过CRL和/或OCSP
设置认证级别
设置哈希算法
PDF加密和设置的权利
综合Swing GUI
批处理支持（通过命令行参数，控制无GUI）
JSignPdf is a Java application which adds digital signatures to PDF documents. It can be used as a standalone application or as an Add-On in OpenOffice.org. JSignPdf is open-source software and can be freely used in both private and business sectors.
Features:
visible signatures - image and/or description located visualy in a PDF file (page and position can be specified)
several different keystore types (as provided by Java)
timestamps from authority in signature (TSA)
certificate validation through CRL and/or OCSP
setting certification level
setting hash algorithm
PDF encryption and setting rights
comprehensive Swing GUI
support for batch processing (controlled by command line arguments, without GUI)
