WASHINGTON, Jan. 23 (UPI) -- The National Security Agency has issued technical guidance for U.S. officials on redacting or editing sensitive documents for release following a series of embarrassing ...

As much as we fail to give Apple's free Preview app enough respect, it is true that there are PDF editing jobs it can't do. Yet there are many third-party apps that will let you do the most remarkable ...

There are times when a PDF truly needs encryption—for instance, if it contains sensitive information and someone just emailed it to you (let’s hope they used another communications method to send you ...