How to Verify Digital Signatures in JPEG

GroupDocs.Signature makes it easy for .NET developers to verify digital signatures in JPEG files from within their applications by implementing a few easy steps.

Create new instance of Signature class and pass source document path as a constructor parameter.
Instantiate the DigitalVerifyOptions object according to your requirements and specify verification options.
Call Verify method of Signature class and pass DigitalVerifyOptions to it.

System Requirements

GroupDocs.Signature for .NET APIs are supported on all major platforms and operating systems. Before executing the code below, please make sure that you have the following prerequisites installed on your system.

Operating Systems: Microsoft Windows, Linux, MacOS
Development Environments: Visual Studio, Xamarin, MonoDevelop
Frameworks: .NET Framework, .NET Standard, .NET Core, Mono
Download the latest version of GroupDocs.Signature for .NET from NuGet

using (Signature signature = new Signature("sample.pdf"))
{
    DigitalVerifyOptions options = new DigitalVerifyOptions("certificate.pfx")
    {
        Comments = "Test comment"
    };
    // verify document signatures
    VerificationResult result = signature.Verify(options);
    if (result.IsValid)
    {
        Console.WriteLine("\nDocument was verified successfully!");
    }
    else
    {
        Console.WriteLine("\nDocument failed verification process.");
    }
}

What is JPEG File Format

A JPEG is a type of image format that is saved using the method of lossy compression. The output image, as result of compression, is a trade-off between storage size and image quality. Users can adjust the compression level to achieve the desired quality level while at the same time reduce the storage size. Image quality is negligibly affected if 10:1 compression is applied to the image. The higher the compression value, the higher the degradation in image quality. JPEG image file format was standardized by the Joint Photographic Experts Group and, hence, the name JPEG. The format has been the choice of storing and transmitting photographic images on the web. Almost all Operating systems now have viewers that support visualization of JPEG images, which are often stored with JPG extension as well. Even the web browsers support visualization of JPEG images. Learn more about JPEG file format

Other Available Options

Multi format digital-signatures validation API for documents and images. Verify signatures from some of the popular file formats as stated below.

Verify Digital Signatures in a JPEG File

C# .NET API to verify digital signatures in an already signed JPEG file using popular electronic signature types. Manipulate e-signature properties within your documents by adding a few lined of code.

About GroupDocs.Signature for .NET API

How to Verify Digital Signatures in JPEG

System Requirements

Verify JPEG Signature Live Demos

What is JPEG File Format

Other Available Options