Издатель

pdf security
http://www.pdfencryption.net/pdfen/pdf-security-software.html

Другие публикации этого издателя:

1. WTM PDF Security with Copy Protection - Protect your PDF, SWF, EXE and other data against illegal use with trial limits.
2. Adobe Pdf Security Software - Get 128 bit AES & RC4 strong protection to lock pdf with open owner guard