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  1. Password Protect Excel Files in Java | Lock Unl...

    Let's learn how to password protect Excel spreadsheet files using Java. Change the existing password or remove it to unlock the XLS/XLSX files using Java API....Documents using Java Lock/Unlock PowerPoint Presentations using Java...

    blog.groupdocs.com/merger/lock-unlock-excel-fil...
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  2. Sign document with Digital signature | Document...

    Learn about the benefits of using digital signatures to sign documents securely. Discover how to add programmatically digital signatures in C# with step-by-step instructions....To sign PDF, Word, Excel, PowerPoint, and other documents you...

    docs.groupdocs.com/signature/net/sign-document-...
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  3. Sign documents with Metadata embedded object | ...

    This article explains how to create encrypted Metadata electronic signature with embedded custom object....To sign PDF, Word, Excel, PowerPoint, and other documents you...

    docs.groupdocs.com/signature/net/sign-documents...
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  4. Search for encrypted objects Metadata signature...

     This article explains how to search for encrypted electronic signatures in the document metadata. This topic contains example of using standard encryption, serialization, class definition and search for embedded objects in the document metadata with GroupDocs.Signature....to eSign PDF, Word, Excel, PowerPoint documents with free to use...

    docs.groupdocs.com/signature/java/search-for-en...
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  5. Search for embedded object with custom encrypti...

    This article explains how to search for embedded electronic signatures with custom encryption in QR code electronic signatures. This topic contains example of custom encryption, class definition and search for encrypted objects in the QR-codes with GroupDocs.Signature....To sign PDF, Word, Excel, PowerPoint, and other documents you...

    docs.groupdocs.com/signature/net/search-for-emb...
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  6. How to generate barcode and sign document using...

    This guide describes how to improve your document with generated barcodes using C#. Sign your documents with Codabar, Event or Code39Extended using GroupDocs.Signature .NET API by GroupDocs....Microsoft Word, Microsoft PowerPoint, Microsoft Excel, PNG, JPEG...

    docs.groupdocs.com/signature/net/how-to-generat...
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  7. eSign document with QR code signature | Documen...

    This article explains how sign documents with electronic signature as QR code on document page with GroupDocs.Signature API....To sign PDF, Word, Excel, PowerPoint, and other documents you...

    docs.groupdocs.com/signature/net/esign-document...
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  8. Sign documents with encrypted metadata text | D...

    This article explains how to create encrypted Metadata electronic signature with GroupDocs.Signature API...to eSign PDF, Word, Excel, PowerPoint documents with free to use...

    docs.groupdocs.com/signature/java/sign-document...
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  9. Deleting Barcode signatures - advanced | Docume...

    This article shows how to delete Barcode electronic signatures different ways with GroupDocs.Signature API....To sign PDF, Word, Excel, PowerPoint, and other documents you...

    docs.groupdocs.com/signature/net/deleting-barco...
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  10. Deleting Image signatures - advanced | Document...

    This article shows how to delete Image electronic signatures different ways with GroupDocs.Signature API....To sign PDF, Word, Excel, PowerPoint, and other documents you...

    docs.groupdocs.com/signature/net/deleting-image...
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