Actually i don't have much knowledge in java Security. My requirement is Add Digital Signature to pdf from USB device in a client machine,If any one you worked on this type of issue Please assist me the link,
Thanks,
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iText is a PDF framework for Java that allows you to add signatures to PDF documents. Take a look at that: http://www.itextpdf.com/ . – Henrik Aasted Sørensen Nov 23 '12 at 14:22
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1You may want to take a look at iText, as @Henrik said, especially [this document](http://itextpdf.com/book/digitalsignatures) by the main iText architect demonstrates its current features concerning digital signatures. Of special interest might be the section on "Signing a document using a USB token" – mkl Nov 23 '12 at 21:39
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I've written a white paper about digital signing and PDF. It also explains what such an USB token is about. You can download this document for free from this URL: http://itextpdf.com/book/digitalsignatures
Bruno Lowagie
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Do you mean having Java code on the server and needing to sign the document on the client side? Such task requires having client-side mechanisms (usually a Java applet or ActiveX control or some standalone application) which will do the actual signing job.
Our SecureBlackbox library has a distributed cryptography add-on which lets you accomplish the task easily. You will find detailed description of the add-on on our site or in this SO answer.
If you need to sign the data in client-side Java code (i.e. the USB device is local to the code), then you can use PDFBlackbox package of our SecureBlackbox product - it supports operations with USB tokens and cryptocards.
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Eugene Mayevski 'Callback
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Interesting - but I have never heared of a "non-exporable private key" ;) – Robert Nov 23 '12 at 15:03
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@Robert - now you do. Cryptographic hardware doesn't let you extract the private key or symmetric key - this is one of main benefits of using this hardware. – Eugene Mayevski 'Callback Nov 23 '12 at 16:02
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Don't take comments with smileys too serious. This was just a broad hint because of the typo in your diagram. – Robert Nov 23 '12 at 16:04