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2. Digital signature - Wikipedia

   en.wikipedia.org/wiki/Digital_signature

   Alice signs a message—"Hello Bob!"—by appending a signature computed from the message and her private key. Bob receives both the message and 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 ...

3. Message authentication - Wikipedia

   en.wikipedia.org/wiki/Message_authentication

   Message authentication or data origin authentication is an information security property that indicates that a message has not been modified while in transit (data integrity) and that the receiving party can verify the source of the message. [1] Message authentication does not necessarily include the property of non-repudiation. [2] [3]

4. 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 ...

5. 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 ...

6. Why do businesses require a signature for credit card ... - AOL

   www.aol.com/finance/why-businesses-require...

   The use of signatures to verify credit transactions dates back to ancient times, with the practice even mentioned in the Talmud. Carried over into the credit card era, signatures serve to confirm ...

7. Here's how most states use signatures to verify voters ... - AOL

   www.aol.com/heres-most-states-signatures-verify...

   In the process of “signature verification,” election officials compare a voter’s signature on a ballot’s security envelope with a past signature on file, often from the state department of ...