Posts tagged "Message Digest"

Message Digest

A message digest is a mathematical function that creates a fixed length data item, also known as a one-way hash, in a PDF document when it is digitally signed. Any tampering or changes in the document will result in a different message digest alerting Acrobat or the Reader that the document has been changed.

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Digital Signature

A digital signature is a process performed on a data stream that is based on the use of public key cryptography and cryptographic message digests. The purpose and function of a digital signature is twofold: Determine the data “signed” has not been altered Determine the person or entity who signed the data has been authenticated. […]

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