![]() ![]() During the early versions of PDF documents, security in the form of access controls or continuing use controls was not supplied, mainly because the most significant characteristic of Adobe PDF documents was to ensure that what was displayed on the screen or on a printed copy was identical, irrespective of the operating system or printing device being used. ![]() Adobe was the earliest pioneer in producing PDF documents, and over the years, they added a number of security controls to help secure PDF documents from misuse. ![]()
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