Public Key

Public Key Usage Basic Terms (SARS Explained)

This blog gives one more list of useful definitions while using Public Key Infrastructure in EDI communication.

  • Message Digest A string of digits (or string value) that is created by using a formula called a one-way hash function. The data for which the message digest is calculated is used as input to the hash function. If any portion of the original data should change, it must result in a different message digest.
  • Digital Signature Encrypting a message digest with a private key, creates a digital signature, which is an electronic means of authentication.
  • SHA1 The “Secure Hash Algorithm 1” is a one-way hash algorithm that is used to calculate a hash value for a piece of data. Any change in the data should yield a different hash value. It is not possible to reconstruct the original data from only the hash value. This algorithm is defined in the National Institute for Standards and Technology’s (NIST) FIPS 180-1 document.
  • Triple-DES Triple-DES (also known as “3DES”) is a symmetrical encryption algorithm.
  • RSA RSA (“Rivest, Shamir, Adleman”) is an asymmetrical encryption algorithm as developed by Ron Rivest, Adi Shamir, and Leonard Adleman.
  • MIME “Multipurpose Internet Mail Extensions” is a specification for the formatting of non-ASCII messages, so that they can be sent over the Internet, as part of SMTP e-mail messages.
  • S/MIME “Secure Multipurpose Internet Mail Extensions” is a specification for secure electronic mail. S/MIME was designed to add security to e-mail messages in MIME format.
  • MDN A “Message Disposition Notification” is an electronic receipt that an e-mail message has been delivered, read or processed by the recipient of the original message. The MDN itself is in the form of an SMTP e-mail message that is sent back to the notify-party of the original message.

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