Revision 5e998f11
Added by osmith about 4 years ago
| docs/imsi-pseudo-spec.adoc | ||
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// FIXME: do we need to enforce the LU now, with an arbitrary CM Service |
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// Request, or would this only be necessary for Osmocom? (OS#4404) |
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The SIM must start a Location Updating Request after changing the pseudonymous |
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IMSI, so the CN does not try to contact the ME with the previous pseudonymous |
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IMSI. The SIM applet must wait before switching the pseudonymous IMSI, because |
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otherwise it would be possible for an attacker to correlate the arrival time of |
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the SMS with the time of the following Location Updating Request. |
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===== Warning the Subscriber If the Pseudonymous IMSI Does Not Change |
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An attacker could potentially block the next pseudonymous IMSI SMS on purpose. |
Also available in: Unified diff
spec: explain sleep in sim app before imsi switch