Mifare CSN

• All Mifare cards come with a built-in CSN or card serial number
• This electronic number is presented in much the same way as 125kHz in that it is not encrypted and can be read by a larger range of devices easily purchased on the open market

  For instance, many smart phones are able to read this information, making it an even less secure method than most 125kHz systems

• CSN is generally used where there is a requirement to read Mifare cards from a number of different access control systems, or from third party cards such as pay as you go cards
• While it offers great flexibility, it is very insecure