Digital certificates are the identities issued to a legal entity by the certified CAs (Certificate Authorities) proving that wherever the private key of this certificate is used it can only be used by the owner of the digital certificate to whom it was issued. Brief overviewÄigital certificates bind a certain state of the document to a digital certificate, approving that this state of the document was acknowledged by the owner of the digital certificate at a certain time. Lets dive into what these digital signatures are and how they are really performed programmatically using iText7 with bouncy castle and. Corporate businesses and now even small enterprises look for solutions related to digital signatures from the DocuSign, EchoSign, SigningHub, RightSignatures, ZohoSign and other big companies providing solutions for digital signatures with document workflows. Since ISO 320001, PDF is a standard portable document interface and its extensive support for digital signatures makes PDF the default go to document types to preserve document integrity in business scenarios. ITextSharp is a wonderful library written to interact with PDF or create new PDF files, the latest version available is called iText7.
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