Revision 9d63d6fd
Added by laforge about 4 years ago
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= Specification for IMSI Pseudonymization on the Radio Interface for 2G and Above
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= Specification for IMSI Pseudonymization on the Radio Interface for 2G/3G/4G
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== Introduction |
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But this is not enough. So-called IMSI catchers were invented and are used to |
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not only record IMSIs when they have to be sent. But also to force ME to send |
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their IMSI by immitating a Base Transceiver Station (BTS). IMSI catchers have
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their IMSI by imitating a Base Transceiver Station (BTS). IMSI catchers have |
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become small and affordable, even criminals actors without much budget can use |
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them to track anybody with a mobile phone. |
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[[hlr-imsi-pseudo-i]] |
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==== imsi_pseudo_i |
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The counter imsi_pseudo_i indicates how often a subscriber's pseudonymous IMSI
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The counter imsi_pseudo_i indicates how often a subscribers pseudonymous IMSI |
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was changed. The value is 1 for the first allocated pseudonymous IMSI of a |
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subscriber. When allocating a new pseudonymous IMSI for the same subscriber, |
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the new imsi_pseudo_i value is increased by 1. The counter is used by the SIM |
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spec: minor language/wording improvements