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SIM and USIM Filesystem: a Forensics Perspective
No full textThe main purpose of this paper is to describe the real filesys-
tem of SIM and USIM cards, enlightening what the offi
cial standard reference does not say. By analyzing the full
filesystem of such embedded devices, it is possible to find
a lot of undocumented files usable to conceal sensitive and
arbitrary information that are unrecoverable with the stan-
dard tools normally used in a forensic field. In order to
understand how it is possible to use a SIM/USIM for data
hiding purposes, the paper will present a tool capable of
extracting the entire observable memory of these devices to-
gether with the effective filesystem structure. Further, some
practical examples regarding the data hiding procedure as a
proof of concept will be analyzed and discussed
L’intervento pubblico nel trasporto ferroviario tra liberalizzazione e esigenze di servizio pubblico
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