When configuring the proximity cards of your business, you need to consider the privacy of the credentials. Choosing to display or not display the card numbering can affect the level of privacy of your employee. To understand how the numbering of proximity cards can affect the data privacy level of your business, you need to have an understanding of the differences between internal and external proximity card numbers.
Internal Proximity Card Number
This is the number that is encoded into an individual proximity card. This is the credential or number that is read by a proximity card reader.
External Proximity Card Number
This is the number that is printed on the outside of cards using ID card printers. This number will be visible to all. In general terms, there are three levels of proximity card privacy and each of these levels has different card numbering options, denoted by code numbers like “A”, “M”, “B”, “S” etc. Let us see these options in detail.
Low Privacy
In this level of proximity card privacy, the sequential number encoding matches with the printed numbering, that is, the internal card number and the external card number match with each other. When the external card number is printed, it will be denoted by the letter “M” and when it is engraved, it will be denoted by the letter “A” on the packaging of the card. This is a very commonly used level of privacy as it is easy to use.
Medium Privacy
In this privacy level, the sequential number encoding does not match with the printed number on the card. The internal and external card numbers will be sequential, but they will not match. The letter “B” will be used to denote engraved numbers and “S” will be used when the numbers are printed using common ID card printers like Fargo printers, Zebra printers, etc. This is more secure as the internal card number cannot be obtained from the back of the proximity card. Both these card numbers should be logged in to avoid the risk of duplicating cards.
High Privacy
In this level of proximity card privacy, there will not be any printed card numbering. The card will not be having any external card number engraved or printed on its packaging. Making use of a proximity card reader will be the only way to reach the internal card number of the ID card.
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