I\'m building a web application that most allow the user to digitally sign PDF documents with certificates installed in the client machine.
I would like to sign records in a database with a secure timestamp to prove they have not been altered by anyone after that date.
This is a followup question to question 1072540, \'WinVerifyTrust to check for a specific signature?\'.
At work we have a web app that we\'ll need to interface with another company\'s web app using Single Sign On validated by SAML. Our web apps are written in PHP, and it\'s obviously irrelevant what lan
I use iTextSharp to sign a PDF file. But Adobe Reader cannot verify my signature. I use SHA-2 test certificate (I tried also SHA-1) generated by certification authority. I h开发者_高级运维ave installe
Using Acrobat 9, if I sign a PDF using a self-signed certificate and then edit the PDF after I sign it, Acrobat will inform me that there is a valid signature on the document but that the document als
After a jar is signed and the -tsa option was used, how can I validate that the time stamp was included? I tried:
I need to append a pdf file to a digital signed pdf file, keepin开发者_开发知识库g valid the signature ...maybe using revision? ...using iTextSharp? How can I do it?
I\'m signing some data on a .net-based smartcard and trying to verify that signature in a java environment - but without success.
I have an application that records data from a manufacturing process on a periodic basis (various sample rates, minimum of 1 sec, the usual max is 10 min or more).The customer would like to know if th
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