PDF Sign&Seal can sign PDF/A 1a and 1b compliant documents. PDF/A is an archive format of the PDF standards and now recognised as ISO 19005-1:2005. It was conceived to ensure that documents can be accurately rendered in years to come. This is the format of choice when archiving PDFs.
Automatic Adobe CDS Signature Support
PDF Sign&Seal automatically recognises Adobe CDS certificates (which chain to the Adobe Root CA) and uses the information they contain to create advanced long-term PDF signatures. End-users do not need any training or make any special configurations to utilise these high security PDF signatures on their important documents."
Source : Google Reader
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