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17.4. Using Topaz Signatures
LincDoc supports the use of Topaz signature pads with PDF source documents. In order to use this technology, several steps must be followed to properly configure your form, the LincDoc application, and Adobe Reader. Currently, SignatureGem and SigLite pads are supported. For a list of Topaz products, click here.
About Prerequisites
The following prerequisites are required when using Topaz signatures:
- A valid LincDoc signature capture license
- A signing certificate, which can be acquired through LincWare or any of Adobe's CDS providers
- A PDF document with signature field(s) and a minimum signature field size of 20 pt x 20 pt (using Adobe Acrobat measurement tools)
Note: Word source documents are not supported with this signature type. - A Topaz signature pad (SignatureGem and SigLite pads are currently supported)
- The Java Runtime Environment must be installed on the workstation that the pad is plugged in to (recommendation: use the latest stable build of Java 8)
Configuring Topaz Signatures
- Upload the signing key file as described in Installing Your Signature Key.
- Add an Adobe digital signature to your PDF document.
- Commit the document, and reparse to enable configuration in LincDoc.
- Set up the appropriate fields via the administrator interface
- From the Admin dialog box, on the Fields/Sections tab, specify the necessary signature settings.
- Verify that the correct signature field is selected on the left side of the Fields/Sections tab.
- From the Field type drop-down list, select signature.
- From the Signature type drop-down list, select Topaz Signature Pad.
- Specify the Signature mode.
- Select the Certification level.
- From the Signer name field, choose the field that will contain the signers name.
- Specify the fields that will be updated when the document is signed (if any).
- Specify the fields that will be locked (if any).
- Specify the fields that will be updated when the document is not signed (if any).
- Use the Signable setting to specify a condition to control whether or not the document can be signed.
- Use the Exempt from flattening setting to specify a condition if the flatten generated PDFs? option is selected. You need to click the advanced check box, at the top of the Field attributes section, to see this setting.
- Set the trust levels for the certificates in order to validate signatures. (Must be completed only once)
When a document is signed, the signing certificate is used to validate the signature and raise a warning when the document is changed. When you see the Validity unknown mark inside the signature, that means that the PDF viewer does not have the certificate installed.
In order to do that, you need to read these instructions, and click the validity unknown icon in the upper right corner of the screen and follow the directions contained within. - There are 2 timeout settings to be aware of, and possibly adjusted. These are found under >system >configure client.
- Server timeout: How long the web application will wait for the user to launch the signature pad application and sign. The count starts when the user clicks the "sign" button to select which signature to sign. This should be set to at least 15 seconds longer than the client timeout.
- Client timeout: How long the signature pad application will wait for the user to sign before closing automatically. The count starts when the signature pad application launches. This should be set to at least 15 seconds shorter than the server timeout.
About Possible Errors
When using Topaz signatures, first-time users may encounter the issue noted below regarding missing dependent libraries and the SigUsb.dll driver.
To resolve this issue, you need to access this Microsoft web site and download the Visual C++ Redistributable for Visual Studio 2015.
After downloading the package, install it by following the instructions provided by the installation wizard.