is it possible to modify document after Signed by *.p12 file?

[HyungSikKIM]

Dear All.

Q1 :

Is it possible to modify PDF document after Signed by *.p12 file?

Even author or anybody?

Q2 :

Is there any other way to sign PDF doncument such as device connected to my computer, galaxy phone/tab(Samsung), I-Phone/pad or etc.

Thanks.

[Former Community Member]

Answer for Q1

Not exactly sure what you mean here, if you are referring to the "field locking" capability of a signature, then the answer is No, the locked fields cannot be modified (unless the signature is actually removed).  Any fields that are not locked (not associated with the signature) can be filled in\changed.

If the document is dynamic, it can change after a signature is applied, but the signature "status" will report that changes have occurred.

Answer for Q2

Many different types of electronic signatures are supported for PDF (signature pads, biometric, digital signatures etc.,..)  through plug-ins.  I am not aware of any solutions that currently use iPads or phones to act as the "signing" device.

Check this link for information on security partners:  http://www.adobe.com/security/partners/index.html

Regards

Steve