![]() ![]() You see a green badge in the upper right corner of the document. #KOFAX POWER PDF SIGNATURE FOR MAC#When you view a signed document in Kofax Power PDF for Mac the document will display one of three states: The certificate is checked against OSCP or CRLs to ensure it hasn't been revoked.The expiration date of the certificate is considered.The chain of trust of the certificate is validated.The signature of the certificate is tested to ensure the certificate is valid.The signed content of the document is validated to ensure it hasn't changed.When you open a PDF with a digital signature using Kofax Power PDF for Mac, the following steps occur to validate the signature: ![]() Kofax Power PDF for Mac is capable of checking both, as necessary. ![]() One system is called the Online Certificate Status Protocol (OSCP), and the other is Certificate Revocation Lists (CRLs). Issuers of digital certificates maintain systems to check whether a digital certificate has been revoked or remains valid. In an event such as this it's possible to revoke the digital certificate. For example, if you lose your laptop or your secure USB dongle someone else could gain access to your private key, which means the integrity of the certificate has been compromised. Just because a certificate is verified as trusted does not mean it always must be so. Adobe's applications only trust signatures with root certificates from the Adobe Approved Trust List (AATL). Securityĭigital certificates have a "chain of trust", which begins with a root certificate, may include intermediary certificates, and ends with the certificate of a person or company. It's safe to give your public key to others. Your digital certificate, containing your public key, along with your identity information and the digital signature, is embedded in any documents you sign. Documents are signed using this private key. Unlike the public key which helps make up the certificate, the private key is typically stored on your system keychain where other secure items, like passwords, are stored.
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