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Adobe Reader 7 Revealed: Working Effectively with Acrobat PDF Files by Ted Padova

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Chapter 17. Using Digital Signatures and Security

Did you know that you can digitally sign a PDF document using Adobe Reader? The PDF document requires some special preparation, but once it's prepared with Adobe LiveCycle Reader Extensions, you have the ability to add a digital signature to a document.

In Adobe Reader you can view PDF documents that are signed electronically by other users and you can create your own personal digital signature. In addition, you can export a public certificate from a Digital ID that you create. A PDF author can use your exported public certificate to encrypt files in such a way that the file can only be opened with the password you used when you created your Digital ID.

There are two parts to using Digital IDs. The ...

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