Then you could generate symmetric keys using a secret algoritm using the GPS device's serial number + a secret master key as input.įor all those who wanted to transfer all their applications into the SD cards by default on their Android 2.2 Froyo operating system, we will check out the same on how you can do it. Preferably, your GPS device then contains a 'smart card chip' containing keys, and your map SD card will communicate with this chip to create a encrypted channel. ![]() I suggest you make a note of the old CID first, in case you want to set it back later. If you only need to change the card serial number (part of the CID) you can supply the old CID and the new serial number and the new CID will be calculated for you. ![]() Supply the new CID you want to set on the command line.
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