There was a download of SmartShelter|PDF 5.21 on the developer's website when we last checked. We cannot confirm if there is a free download of this software available.
We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software. This free software was originally designed by WIBU-SYSTEMS AG. The software belongs to Security Tools.
From the developer:
SmartShelter | PDF integrates batch processing capability for Adobe Acrobat. For that purpose a new command Encrypt multiple files is available.
This command, used in batch processing, permits the presetting of all CodeMeter parameters to produce the encrypted documents. Therefore it is possible to encrypt all PDF documents in a directory or to automatically convert and encrypt Microsoft Word documents in a single step.
You may want to check out more software, such as ANtsP2P, MessageLock or SiteAdvisor for Internet Explorer, which might be similar to SmartShelter|PDF.