Data Hiding in SIM/USIM Cards: A Steganographic Approach

Author

Savoldi, Antonio ; Gubian, Paolo

Author_Institution

Dept. of Electron. for Autom., Brescia Univ.

fYear

2007

fDate

10-12 April 2007

Firstpage

86

Lastpage

100

Abstract

The aim of this paper is twofold. First, the real structure of a SIM/USIM card file system will be presented, analyzing what is valuable from a forensics perspective and showing what evidence is not detectable and extractable with the tools present in the arena of open-source and proprietary software. After that, the paper will focus on a framework that can be used to detect and extract the so-called nonstandard part of a SIM/USIM file system, which is a concealed part usable also to store arbitrary and sensitive information. As a pro of-of-concept, an interesting example will be presented on the methods usable to obtain the data hiding in an ordinary SIM/USIM card

Keywords

cryptography; data encapsulation; file organisation; memory cards; SIM card file system; USIM card file system; data hiding; steganographic approach; Automation; Data encapsulation; Data mining; Data security; EPROM; Forensics; Information technology; Open source software; Software tools; Steganography; SIM/USIM card; data hiding; filesystem; imaging tool;

fLanguage

English

Publisher

ieee

Conference_Titel

Systematic Approaches to Digital Forensic Engineering, 2007. SADFE 2007. Second International Workshop on

Conference_Location

Bell Harbor, WA

Print_ISBN

0-7695-2808-2

Electronic_ISBN

0-7695-2808-2

Type

conf

DOI

10.1109/SADFE.2007.7

Filename

4155352