Revision 29a79afa
Added by laforge about 4 years ago
| docs/imsi-pseudo-spec.adoc | ||
|---|---|---|
| 32 | 32 |
which uses public-key cryptography to ensure that the permanent subscriber |
| 33 | 33 |
identity (IMSI) is not transmitted over the air interface anymore. |
| 34 | 34 |
Rather, a concealed version of it is transmitted (3GPP TS 33.501, |
| 35 |
Section 6.12.2). The 5G SUCI mechanism can not be used 1:1 for previous |
|
| 36 |
generations of cellular networks as it relies on extending the |
|
| 37 |
subscriber identity from the small, 15-decimal-digit IMSI to a much |
|
| 38 |
larger SUPI (Subscriber Permanent Identifier) only available in 5G. |
|
| 35 |
Section 6.12.2). The 5G SUCI mechanism can not be adapted easily for previous |
|
| 36 |
generations of cellular networks as it relies on introducing an entirely |
|
| 37 |
new mobile identity type of larger size (SUCI) than any of the existing |
|
| 38 |
ones (e.g. IMSI), causing significant implications on protocol stacks |
|
| 39 |
and implementations all across the protocol stack of all network elements, |
|
| 40 |
including the ME. |
|
| 39 | 41 |
|
| 40 | 42 |
No mechanism for increasing subscriber identity and location privacy on |
| 41 | 43 |
the radio interface has been specified for the previous cellular |
Also available in: Unified diff
spec: fix paragraph regarding SUPI
The SUPI often is not larger than the IMSI, but the SUCI is.