name: 2G
full_form: 2nd Generation
context: it can be predicted that breaking 64-bit keys will be âcommon placeâ in at most 10 years, but probably much earlier, to attackers with quite moderate resources. The conclusion is that 2G SIM key sizes will not remain secure for the economic life-time of SAE/LTE. Moreover, if 2G SIM support is kept in SAE/LTE, it can be envisioned that the practical problems of phasing out 2G SIMs is just pushed ahead, and when the ânext-generationâ systems are to be designed, the problem of the âSIM-legacyâ will still exist. Security drawbacks of 2G SIM 2: Lack of Mutual Authentication As is well known, 2G SIM application does not support (home) network authentication. In SA3 it has been discussed whether in LTE, it should be possible to authenticate even the visited network. In any case, use of 2G SIM is clearly a major security risk. Security drawbacks of 2G SIM3: Lack of replay protection There is no guaranty of random freshness in GSM AKA. Related to the issue of network authentication is the
description: 2G refers to the second generation of wireless communication standards used in mobile networks. It predates 3G and LTE technologies, defining network architecture, protocols, and security features for mobile devices.
explanation: The text explicitly mentions '2G' as a set of standards for wireless communication, highlighting its role in mobile networks before the advent of newer technologies.
section_title: 7.2.1.3	LTE access
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