International Verifact Inc., which supplies technology for the point of sale and electronic funds transfer market, introduced a line of terminals to process personal identification numbers at the point of sale. The Sentinel and Sentinel Plus personal identification number pads interact with all POS terminals, without any software or programming changes.

The pads support both current data encryption standards, called Master Session or DUKPT (derived unique key per transaction) security. Master Session uses an internal algorithm with a coded variable for each institution. It requires new variables to be put in the system manually by the host.

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