[PostFinance] How to setup the «Compose the string to be hashed by concatenating the value of» option?

Extensions PostFinance
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Log in to the merchant interface, and then:

  1. Select the «Configuration» item from the top menu.
  • Select the «Technical information» item from the top submenu.
  • Select the «Global security parameters» item from the 3-rd level submenu.
  • Locate the «Compose the string to be hashed by concatenating the value of» option, and choose the «Each parameter followed by the passphrase» value.
  • Press the «SAVE» button.

The value affects the algorithms of the SHA-IN and SHA-OUT signatures calculation.

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