What is an apf file and how do I open an apf file?
The APF file extension is a data format associated to Adobe programs. APF files were developed by Adobe Systems. These files are also known as Adobe Profile File or Adobe Protected Format. These files contain a digital certificate or identification and signature used to authorize and identify a source of information. A digital signature consists of a handwritten name, a logo or other graphic, or text explaining the purpose of the signature. It also allowed adding graphics or pictures to the digital signature. Another option was to create invisible signatures. Adobe's legacy certificate format has not been used after Acrobat 5. They can be upgraded in Acrobat to a newer certificate format. Acrobat 6 used PFX file or the Windows Certificate Store. Then Acrobat 9 dropped neither creating nor importing APF files. Files in APF format can be opened with Adobe Acrobat X in Mac Os, Linux and Microsoft Windows based Systems.
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