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  2. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    This is an accepted version of this page This is the latest accepted revision, reviewed on 13 November 2024. Portable Document Format, a digital file format For other uses, see PDF (disambiguation). Portable Document Format Adobe PDF icon Filename extension.pdf Internet media type application/pdf, application/x-pdf application/x-bzpdf application/x-gzpdf Type code PDF (including a single ...

  3. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    He uses Alice's public key to verify the authenticity of the signed message. A digital signature is a mathematical scheme for verifying the authenticity of digital messages or documents. A valid digital signature on a message gives a recipient confidence that the message came from a sender known to the recipient. [1] [2]

  4. List of file signatures - Wikipedia

    en.wikipedia.org/wiki/List_of_file_signatures

    A file signature is data used to identify or verify the content of a file. Such signatures are also known as magic numbers or magic bytes. Many file formats are not intended to be read as text. If such a file is accidentally viewed as a text file, its contents will be unintelligible.

  5. PAdES - Wikipedia

    en.wikipedia.org/wiki/PAdES

    If in the document itself the validar to confirm that the signature was valid is concept known as long-term validation (LTV). [2] The PAdES standard, ETSI European Standard (EN) 319 142, introduces a number of adaptations and extensions to PDF to satisfy the Directive's requirements. ETSI will feed these European-specific elements back into ISO ...

  6. Adobe Sign - Wikipedia

    en.wikipedia.org/wiki/Adobe_Sign

    Adobe Acrobat Sign (formerly EchoSign, eSign & Adobe Sign) is a cloud-based e-signature service that allows the user to send, sign, track, and manage signature processes using a browser or mobile device. [4] It is part of the Adobe Document Cloud suite of services.

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