SecurSign 5 encrypts, digitally signs and verifies digital signatures on PDF documents.

The server-based application runs in real time with other processes in an unattended environment to handle high-volume and on-demand production needs. SecurSign can also batch process large collections of PDF documents.

Digital signatures placed by SecurSign allow organizations to distribute electronic documents without fear of tampering. Since the process is compatible with the Adobe Acrobat® Digital Signature Mechanism, no additional software is required to open documents or verify signatures using Adobe Acrobat, Adobe Reader or other digital signature-aware PDF viewers.

End-users with Adobe Reader or other digital signature-aware software can immediately verify whether or not a digitally-signed PDF file has been altered.

SecurSign can encrypt PDF documents to restrict the end user’s ability to edit, copy, or print with 256-bit AES encryption. Other security features in SecurSign 5 allow users to set passwords to control who may view, print, or modify a document, or set higher level passwords that control who may change security settings.

SecurSign 5 produces ISO 32000-compliant PDF files and can perform optimization and cleanup routines prior to signing, and reduces file size in most instances.

Representation of Secure Sign functionality


PDF Document Security with SecurSign 5

  • Signature Validation – detects tampering independent of Acrobat
  • PDF/A Support – Sign PDF/A documents without losing PDF/A compliance
  • OpenType Fonts – Place signature text using any OpenType font
  • 2048-Bit Key Lengths for Digital Certificates

Digital Signature and Verification Features

  • Digitally Sign using visible or invisible digital signatures
  • X.509v3 Digital Certificates from any Certificate Authority
  • Dynamically Add New Signature Fields to any PDF page
  • Multiple Digital Signatures can be applied sequentially
  • Custom Graphics including watermarks, logos and handwritten signatures
  • Verification to detect file modification or tampering since it was signed
  • Linearization to optimize signed PDF documents with Fast Web View for faster viewing on a network
  • No additional software is required – use any digital-signature aware PDF viewer to view or verify signatures

Encryption Features

  • Advanced Encryption Standard (AES) encryption algorithm with 128-bit or 256-bit key lengths
  • RC4 encryption algorithm with 40-bit or 128-bit key length for compatibility with older PDF viewers
  • Secure envelopes; encrypt PDF and non-PDF attachments, leaving the “envelope” PDF unencrypted
  • Set User Passwords to control who may view, print, or modify a document
  • Set Owner Passwords to control who may change security settings
  • Set Document Permissions to control viewing, printing, copying, assembly and accessibility.

File Handling Options

  • Optionally, retain current file modification date
  • Utilize PDF as a secure delivery envelope for attached files
  • Linearize output PDFs for faster access and viewing when downloaded from the Web or a network (Fast Web View)
  • Optimize to reduce output file size
  • Consistent with Title 1 of the United States Digital Millennium Copyright Act (DMCA) of 1998, Appligent software will only permit the modification of encrypted documents when the owner password is supplied
Representation of Secure Sign functionality

Tech Specs

Technical Features of SecurSign

  • X.509v3 Digital Certificates
  • PKCS#12 Personal Information Exchange Syntax Standard
  • SHA-1 Message Digests
  • RC4 Stream Ciphers

Integration Features

  • No limit on concurrent users or connections
  • No limit on the number of documents processed
  • No limit on threads – run as many instances as you want
  • Supports PDF 1.0 and higher
  • Call from any programming or scripting language including (but not limited to) Perl, PHP, Java, C++, ASP & .Net, Visual Basic, Cold Fusion and Lotus Notes
  • May be integrated with other Appligent server products as part of a complete PDF workflow solution

Operating Systems Supported

Microsoft Windows
Windows 7 and higher (32 or 64 bit)

Linux (RedHat, SUSE, Ubuntu, etc.)
Kernel 2.6, 32 bit
Kernel 2.6 64 bit

5.2 & above on Power

Oracle (Sun) Solaris
10 and above on SPARC

Hewlett-Packard HP-UX
11i v2 & above on Itanium

Apple Mac OS X
10.5 & above on Intel x86


Use SecurSign as an integral part of your web server to encrypt and sign documents on the fly before delivery. In a document workflow, SecurSign can be scripted for multistage processing and deployed with our other products as part of a complete PDF workflow solution.


See the SecurSign documentation for complete information.

Representation of Secure Sign functionality

Try & Buy

How to Buy SecurSign

SecurSign starts at $2,495.00 (USD) for a single server with up to 4 cores. Development licenses are available at a 50% discount. Contact us for more information.

Download from the Appligent Web Store

Free Trial… Buy SecurSign…
Representation of Secure Sign functionality

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SecurSign - Sign, Encrypt, and Verify Digital Signatures on PDF Documents