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If this property is not null
when you call Sign, an X.509
RFC 3161
time-stamped signature will be created by using
the service provided in the URL. Note that this
property serves as an option for Sign, and is not
persisted in the PDF document.
If your time-stamping service provider requires authentication, you can
specify your credentials in the Uri. For example,
"https://username:[email protected]/tsp".
ABCpdf uses System.Net.WebRequest to send the time-stamping request. You can use System.Net.ServicePointManager.ServerCertificateValidationCallback
to customize trust relationship establishment when you connect to an SSL/TLS channel.
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