Sign documents with standard encryption for QR-code Leave feedback
GroupDocs.Signature provides ability to encrypt QR-code signature with symmetric algorithms. Class SymmetricEncryption implements one of the following values algorithms (DES, TripleDES, RC2, Rijndael or AES), string value key and string value salt.
Here are the steps to encrypt QR-code text with embedded encryption by GroupDocs.Signature:
- Create one or several objects of QrCodeSignOptions object with Data or Text property
- Instantiate the QrCodeSignOptions object according to your requirements and custom object to Data property.
- Call Sign method of Signature class instance and pass QrCodeSignOptions to it.
This example shows how to encrypt QR-code signature.
using (Signature signature = new Signature("sample.pdf"))
{
// setup key and passphrase
string key = "1234567890";
string salt = "1234567890";
// create data encryption
IDataEncryption encryption = new SymmetricEncryption(SymmetricAlgorithmType.AES, key, salt);
// setup QR-Code options
QrCodeSignOptions options = new QrCodeSignOptions()
{
// set QR-code text
Text = "This is secure text that will be encrypted",
// QR-code type
EncodeType = QrCodeTypes.QR,
// specify serialization encryption
DataEncryption = encryption,
// locate and aligh signature
Height = 100,
Width = 100,
VerticalAlignment = VerticalAlignment.Bottom,
HorizontalAlignment = HorizontalAlignment.Right,
Margin = new Padding() { Right = 10, Bottom = 10 }
};
// sign document to file
signature.Sign("QrCodeEncrypted.pdf", options);
}
You may easily run the code above and see the feature in action in our GitHub examples:
- GroupDocs.Signature for .NET examples, plugins, and showcase
- GroupDocs.Signature for Java examples, plugins, and showcase
- Document Signature for .NET MVC UI Example
- Document Signature for .NET App WebForms UI Example
- Document Signature for Java App Dropwizard UI Example
- Document Signature for Java Spring UI Example
Along with the full-featured .NET library, we provide simple but powerful free online apps.
To generate QR codes and/or sign your files with QR codes for free, you can use the QR Code Generator online app.
To sign PDF, Word, Excel, PowerPoint, and other documents you can use the other online apps from the GroupDocs.Signature App Product Family.
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