a very old plugin for Acrobat(Reader) 3.x,4.x,5.x,had better 4.x or 3.x, developed by a Chinese developer, and has no update.
It aim to open XESC_EXLock encrypted PDF documents winrar zip download for free german.
Download it here,
If you meet this issue, then you need this plugin,
Donations are welcome,vogelstimmen kostenlos herunterladen