Note This page contains release notes for GroupDocs.Signature for .NET 20.7 Major Features There are about ten new features, improvements and fixes in this release. New features implement ability to add timestamp and certification to digital signatures for PDF documents. Important changes were made to storing signatures metadata information. This data layer will be encrypted and compressed into one system document metadata. With these improvements we introduced ability to track document history of actions performed with a various processes like signing, modyfying or deletion signatures....layer will be encrypted and compressed into one system document...