Certify PDF document / Add a certifying signature

Q: Is it possible to certify a PDF document with Qoppa’s libraries and componentsA: As of version 2013R2, it is possible to add a certifying signature using our libraries jPDFProcess, jPDFSecure, jPDFNotes and jPDFEditor. What is a certifying signature? A certifying signature is a digital signature. A certifying signature has to be the first applied […]

Read More

Apply Digital Signature on a PDF document using USB hardware token PKCS 11

Q: Can jPDFSecure apply digital signatures using a hardware token? A: Yes, our 2 java PDF libraries jPDFSecure and jPDFProcess can apply a digital signature to PDF documents using a hardware token through PKCS#11. Sample Code // Load token configuration file and register provider String configName = "pkcs11.cfg"; Provider p = new sun.security.pkcs11.SunPKCS11(configName); Security.addProvider(p);   // Create key store […]

Read More

Apply / Verify PDF Digital Signature with Server Timestamp

What are Timestamped Digital Signatures? When creating a digital signature, it is possible to simply use the computer’s date and time. But this may not be valid in a lot of legal environments. Time-stamp servers, also called Time Stamp Authorities (TSA), can provide a legal timestamp and there is a protocol to access the servers […]

Read More