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  2. Digital Postmarks - Wikipedia

    en.wikipedia.org/wiki/Digital_Postmarks

    A Digital Postmark (DPM) is a technology that applies a trusted time stamp issued by a postal operator to an electronic document, validates electronic signatures, and stores and archives all non-repudiation data needed to support a potential court challenge. It guarantees the certainty of date and time of the postmarking.

  3. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    The branch office can later sign a message and the central office can use the public key to verify the signed message was not a forgery before acting on it. A forger who doesn't know the sender's private key can't sign a different message, or even change a single digit in an existing message without making the recipient's signature verification ...

  4. List of PDF software - Wikipedia

    en.wikipedia.org/wiki/List_of_PDF_software

    A commercial PDF editor, markup and collaboration product aimed at engineering and architectural markets. Foxit Reader: Freeware: Highlight text, draw lines, measure distances of PDF documents. Foxit PDF Editor Suite: Free trial: Integrated PDF Editing and eSign anywhere. Optionally, ChatGPT+ gDoc Fusion: Proprietary/Shareware

  5. Customize your signature in AOL Mail

    help.aol.com/articles/customize-your-siganture...

    AOL Mail provides a comprehensive set of tools designed to help you craft a distinctive and memorable email signature. Whether you're personalizing fonts, adding images, or formatting text, AOL Mail offers a wide range of options to ensure your signature reflects your unique style and professionalism. Add a signature

  6. BLS digital signature - Wikipedia

    en.wikipedia.org/wiki/BLS_digital_signature

    A BLS digital signature, also known as Boneh–Lynn–Shacham [1] (BLS), is a cryptographic signature scheme which allows a user to verify that a signer is authentic.. The scheme uses a bilinear pairing:, where ,, and are elliptic curve groups of prime order , and a hash function from the message space into .

  7. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    PDF files may be digitally signed, to provide secure authentication; complete details on implementing digital signatures in PDF are provided in ISO 32000-2. PDF files may also contain embedded DRM restrictions that provide further controls that limit copying, editing, or printing. These restrictions depend on the reader software to obey them ...

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