Efficient scheme of verifying integrity of application binaries in embedded operating systems |
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Authors: | Soon Seok Kim Deok Gyu Lee Jong Hyuk Park |
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Affiliation: | 1.Department of Computer Engineering,Halla University,Kangwon-do,Republic of Korea;2.ETRI (Electronics & Telecommunications Research Institute),Daejeon,Republic of Korea;3.Department of Computer Science and Engineering,Seoul National University of Technology,Seoul,Republic of Korea |
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Abstract: | Currently, embedded systems have been widely used for ubiquitous computing environments including digital setup boxes, mobile
phones, and USN (Ubiquitous Sensor Networks). The significance of security has been growing as it must be necessarily embedded
in all these systems. Up until now, many researchers have made efforts to verify the integrity of applied binaries downloaded
in embedded systems. The research of problem solving is organized into hardware methods and software-like methods. In this
research, the basic approach to solving problems from the software perspective was employed. From the software perspective,
unlike in the existing papers (Seshadri et al., Proc. the IEEE symposium on security and privacy, 2004; Seshadri et al., Proc. the symposium on operating systems principals, 2005) based on the standardized model (TTAS.KO-11.0054.
2006) publicized in Korea, there is no extra verifier and conduct for the verification function in the target system. Contrary
to the previous schemes (Jung et al. , 2008; Lee et al., LNCS, vol. 4808, pp. 346–355, 2007), verification results are stored in 1 validation check bit, instead of storing signature value for application binary files
in the i-node structure for the purpose of reducing run-time execution overhead. Consequently, the proposed scheme is more
efficient because it dramatically reduces overhead in storage space, and when it comes to computing, it performs one hash
algorithm for initial execution and thereafter compares 1 validation check bit only, instead of signature and hash algorithms
for every application binary. Furthermore, in cases where there are frequent changes in the i-node structure or file data
depending on the scheme application, the scheme can provide far more effective verification performance compared to the previous
schemes. |
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