Invalid digital signature is considered valid by iTextSharp PdfPKCS7.Verify()

Hi guys,

Take a look at the attachment and use the digital signature verification code to verify the signature: http://itextpdf.sourceforge.net/howtosign.html#howtoverifycs

Adobe says that the signature is invalid but iTextSharp sees this signature valid.

I only modified the title font and deleted a word from the same title.

What could be the problem?

SampleSignedPDFDocumentNOT_VALID.pdf

[mkl]

victordomain,

[e-mail] wrote

Adobe says that the signature is invalid but iTextSharp sees this signature valid.

I only modified the title font and deleted a word from the same title.

What could be the problem?

SampleSignedPDFDocumentNOT_VALID.pdf

For an explanation simply take a look at what I answered Alexander Raitskin ("Adding content in append mode") about 6 hours ago.

Regards,   Michael