VeryPDF PDF Security, Encrypt PDF files by PDF Security software, add Electronic Signatures to PDF files, add Digital Signatures to PDF files

VeryPDF PDF Security component offers comprehensive functionality to encrypt your PDF files.

EncryptPDF Command Line and EncryptPDF SDK products,

https://www.verypdf.com/app/encrypt-pdf/try-and-buy.html

Protect PDF files by PDF Toolbox Command Line software,

https://www.verypdf.com/app/pdftoolbox/index.html

PDF documents used in professional circumstances contain important information that needs to be protected against unauthorized access and unintentional alteration. This is achieved by protecting PDF documents through encryption and user permission flags.

PDF Security has following functions:

Application of compliant signatures to PDF/A documents
Verification of signatures in a PDF document
Simple, advanced and qualified electronic signatures
Long-term signatures with embedded trust chain, time stamp and verification
information on certificate validity
Support for mass signature devices (HSM) via PKCS#11
Author's signature (MDP)
Listing and restoring revisions
Invisible and visible signatures and design functions for visible signatures
Protect PDF files against unauthorized access
Encrypt and decrypt PDF documents with owner and user passwords
Set document permission flags
    Read
    Print
    Extract
    Annotate, sign
    Change
    etc.
Set encryption filters (none, RC4, AES)
Set encryption key length (40... 128 bit)
Decrypt including AES V3 (256 bit)

The Digital Signature function is not included in free trial version of PDF Security component, if you wish evaluate Digital Signature function, please e feel free to let us know, we are glad to assist you asap,

http://support.verypdf.com/