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2. Digital signature - Wikipedia

   en.wikipedia.org/wiki/Digital_signature

   Download as PDF; Printable version; In other projects Wikimedia Commons; ... A digital signature is a mathematical scheme for verifying the authenticity of digital ...

3. List of file signatures - Wikipedia

   en.wikipedia.org/wiki/List_of_file_signatures

   However, some file signatures can be recognizable when interpreted as text. In the table below, the column "ISO 8859-1" shows how the file signature appears when interpreted as text in the common ISO 8859-1 encoding, with unprintable characters represented as the control code abbreviation or symbol, or codepage 1252 character where available ...

4. PDF - Wikipedia

   en.wikipedia.org/wiki/PDF

   Before PDF version 1.5, ... Apply a digital signature to existing digital signature form field; Create, delete, modify, copy, import, and export annotations;

5. History of PDF - Wikipedia

   en.wikipedia.org/wiki/History_of_PDF

   3D artwork, e.g. support for Universal 3D file format; OpenType font embedding; support for XFA 2.2 rich text elements and attributes (XFA 2.1 and 2.2 defined for example the following features: dynamic XFA forms, W3C XML digital signatures for XFA, XFA support for Web Services, XFA 'doc-literal' SOAP operations over HTTP, the Web Service's ...

6. Electronic signature - Wikipedia

   en.wikipedia.org/wiki/Electronic_signature

   An electronic signature, or e-signature, is data that is logically associated with other data and which is used by the signatory to sign the associated data. [1] [2] [3] This type of signature has the same legal standing as a handwritten signature as long as it adheres to the requirements of the specific regulation under which it was created (e.g., eIDAS in the European Union, NIST-DSS in the ...

7. PAdES - Wikipedia

   en.wikipedia.org/wiki/PAdES

   The EU recognizes three different eIDAS-compliant implementations of advanced electronic signatures through digital signatures: PAdES, XAdES and CAdES. [7] An electronic signature can carry legal effect and be used as evidence in legal proceedings. A qualified electronic signature shall have the equivalent legal effect of a handwritten signature.