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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 ...
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 ...
On-line/off-line Digital Signatures. First proposed in 1989 by Even, Goldreich and Micali [2] [3] [4] in order to speed up the signature creation procedure, which is usually much more time-consuming than verification. In case of RSA, it may be one thousand times slower than verification. On-line/off-line digital signatures are created in two ...
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.
To verify the signature, local cryptographic verification can do a quick check of integrity or the full receipt or even the original document can be retrieved from the DPM service using the XML Verify request by other parties at a later date and compared with the receipt stored with the document. [5]
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