DIBS offers a solution which uses MD5 or SHA-1 hash algorthims to protect that the parameters are not manipulated, this is called MAC. The MAC ensures that unauthorized persons from altering the information. The MAC can be sent both on the way to and from the shop and also it can also be used in the HTTP reports for verification.
For more information see chapter 6 about security in the web manual or chapter 4 in the server manual.
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