J Sign PDF 1.6.4: A Free and Open Source Tool for Adding Digital Signatures to PDF Documents
Do you need to sign PDF documents digitally for your personal or professional purposes? Do you want to use a free and open source tool that is easy to use and reliable? If yes, then you should check out J Sign PDF 1.6.4, a Java application that adds digital signatures to PDF documents. In this article, we will tell you what J Sign PDF is, how to download and install it, how to use it to sign PDF documents, and what benefits it offers.
What is J Sign PDF and why do you need it?
J Sign PDF is an open source Java application that adds digital signatures to PDF documents. It can be used as a standalone application or as an Add-On in OpenOffice.org. The application uses the OpenPDF library for PDF manipulations.
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J Sign PDF is useful for anyone who needs to sign distance contracts or other documents digitally. Digital signatures are electronic signatures that are created using cryptographic techniques and are attached to electronic documents. They provide authenticity, integrity, and non-repudiation of the signed documents. This means that the signer can be verified, the document cannot be tampered with, and the signer cannot deny signing the document.
Features of J Sign PDF
J Sign PDF has many features that make it a powerful and versatile tool for adding digital signatures to PDF documents. Some of these features are:
Visible signatures - image and/or description located visually in a PDF file (page and position can be specified)
Several different keystore types (as provided by Java)
Timestamps from authority in signature (TSA)
Certificate validation through CRL and/or OCSP
Setting certification level
Setting hash algorithm
PDF encryption and setting rights
Comprehensive Swing GUI
Support for batch processing (controlled by command line arguments, without GUI)
Certificate revocation checks (CRL, OCSP)
How to download and install J Sign PDF
You can download the latest version of J Sign PDF from its official website or from its project page on SourceForge. There are different versions available for Windows, Linux, Mac OS X, and other platforms. You can also download an Add-On for OpenOffice.org if you want to use J Sign PDF as an extension in your office suite.
If you use Windows installer, which already includes Java, you don't need any additional software to run J Sign PDF. Just run the installer and follow the instructions. If you don't use Windows installer, you'll need a Java Runtime Environment in version 8 or newer. You can run JSignPdf.exe on Windows machine or jsignpdf.sh on other platforms from a command line.
How to use J Sign PDF to sign PDF documents
To use J Sign PDF to sign PDF documents, you need to have a digital certificate and a keystore file. A digital certificate is a file that contains your public key and your identity information, such as your name and email address. A keystore file is a file that contains your private key and your digital certificate. You can obtain a digital certificate from a trusted certificate authority (CA) or create a self-signed one using J Sign PDF or other tools.
Once you have your digital certificate and keystore file, you can follow these steps to sign PDF documents using J Sign PDF:
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Launch J Sign PDF and select the PDF files you want to sign. You can also drag and drop the files to the application window.
Click on the "Options" button to configure the signature settings. You can choose the keystore type, file, and password, the signature type, the signature appearance, the timestamp authority, the certification level, the hash algorithm, and the encryption settings.
Click on the "Sign" button to start the signing process. You can monitor the progress and status of the signing process in the application window.
Once the signing process is completed, you can open the signed PDF files and verify the signatures using a PDF viewer that supports digital signatures, such as Adobe Reader.
Benefits of using J Sign PDF
Using J Sign PDF to sign PDF documents has many benefits, such as:
Security and validity of digital signatures
J Sign PDF uses standard cryptographic techniques and protocols to create and verify digital signatures. The signatures are compliant with the PDF specification and the PAdES standard. The signatures are also validated by certificate authorities or timestamp authorities, which ensure their authenticity and integrity. The signatures are legally binding and can be used as evidence in court cases or other disputes.
Compatibility and flexibility of J Sign PDF
J Sign PDF is compatible with various platforms, operating systems, and PDF viewers. It can be used as a standalone application or as an Add-On in OpenOffice.org. It supports different keystore types, signature types, hash algorithms, encryption settings, and signature appearances. It also allows batch processing of multiple PDF files at once.
Cost-effectiveness and convenience of J Sign PDF
J Sign PDF is free and open source software that can be downloaded and used without any fees or restrictions. It is easy to use and has a comprehensive user interface that guides you through the signing process. It saves you time and money by eliminating the need for printing, scanning, mailing, or faxing paper documents. It also reduces paper waste and environmental impact.
Conclusion
Summary of the main points
In conclusion, J Sign PDF is a free and open source tool for adding digital signatures to PDF documents. It offers security, compatibility, flexibility, cost-effectiveness, and convenience for anyone who needs to sign distance contracts or other documents digitally. It has many features that make it a powerful and versatile tool for creating and verifying digital signatures.
Call to action for the readers
If you want to try out J Sign PDF for yourself, you can download it from its official website or from its project page on SourceForge. You can also check out its documentation and its source code if you want to learn more about it. You can also join its community if you want to share your feedback, ask questions, report bugs, or request features.
FAQs
What are the system requirements for J Sign PDF?
J Sign PDF requires Java Runtime Environment in version 8 or newer. It also requires at least 512 MB of RAM and 50 MB of disk space.
What are the supported keystore types for J Sign PDF?
J Sign PDF supports several different keystore types, such as PKCS#12, JKS, BKS, UBER, Windows-MY, Windows-ROOT.
What are the supported signature types for J Sign PDF?
J Sign PDF supports two signature types: standard signature (visible or invisible) and certification signature (author signature).
How can I get support for J Sign PDF?
You can get support for J Sign PDF by visiting its official website, its project page on SourceForge, or its community forum. You can also contact its developer by email at jsignpdf@koula.cz.
How can I contribute to J Sign PDF?
You can contribute to J Sign PDF by donating money via PayPal[^8 ^]^, reporting bugs or suggesting features via SourceForge, translating the application to other languages via Crowdin, or submitting patches or pull requests via GitHub. You can also spread the word about J Sign PDF by sharing it with your friends, colleagues, or clients. 44f88ac181
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