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  2. Adobe Sign - Wikipedia

    en.wikipedia.org/wiki/Adobe_Sign

    Adobe Sign is sold in subscriptions at the individual, small business, or enterprise level. [10] Some of the services available are: Sign forms with an electronic signature or digital signature; Request e-signatures; Create branded forms; Track responses, get email notifications, and send reminders for e-signatures [11]

  3. Digital signature - Wikipedia

    en.wikipedia.org/wiki/Digital_signature

    The first widely marketed software package to offer digital signature was Lotus Notes 1.0, released in 1989, which used the RSA algorithm. [26] Other digital signature schemes were soon developed after RSA, the earliest being Lamport signatures, [27] Merkle signatures (also known as "Merkle trees" or simply "Hash trees"), [28] and Rabin ...

  4. PDF - Wikipedia

    en.wikipedia.org/wiki/PDF

    Apply a digital signature to existing digital signature form field; Create, delete, modify, copy, import, and export annotations; For example, Adobe Systems grants permissions to enable additional features in Adobe Reader, using public-key cryptography.

  5. SignNow - Wikipedia

    en.wikipedia.org/wiki/SignNow

    The company's software-as-a-service platform is intended for individuals and businesses to sign, and manage documents from any computer. The e-signature product is also available for free on iPhone, iPad, and Android devices, which lets users upload and sign documents from their smartphone's e-mail, camera, or Dropbox account. [1]

  6. PDF/UA - Wikipedia

    en.wikipedia.org/wiki/PDF/UA

    PDF/UA (PDF/Universal Accessibility), [1] formally ISO 14289, is an International Organization for Standardization (ISO) standard for accessible PDF technology. A technical specification intended for developers implementing PDF writing and processing software, PDF/UA provides definitive terms and requirements for accessibility in PDF documents and applications. [2]

  7. PAdES - Wikipedia

    en.wikipedia.org/wiki/PAdES

    the signature verifying algorithm that uses the public key, message and digital signature to confirm the authenticity of the message. For PDF documents, the signature data is incorporated directly within the signed PDF document, much as an ink signature becomes an integral part of a paper document, allowing the complete self-contained PDF file ...

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