12/15/2015
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`IEEE Xplore Abstract - A secure and reliable bootstrap architecture
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`Browse Conference Publications > Security and Privacy, 1997.P ...
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`A secure and reliable bootstrap
`architecture
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`Author(s)
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`Arbaugh, W.A.; Distributed Syst. Lab., Pennsylvania Univ., Philadelphia, PA, USA ; Farber, D.J. ; Smith, J.M.
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`Underthe presumption that the hardware comprising the machine (the lowestlayer)is valid, the
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`In a computer system, the integrity of lowerlayersis typically treated as axiomatic by higherlayers.
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`integrity of a layer can be guaranteedif and onlyif: (1) the integrity of the lower layers is checked and
`(2) transitions to higher layers occuronly after integrity checks on them are complete. The resulting
`integrity “chain” inductively guarantees system integrity. When these conditions are not met, as they
`typically are not in the bootstrapping(initialization) of a computer system,no integrity guarantees can be
`made,yet these guaranteesare increasingly importantto diverse applications such as Internet
`commerce, security systems and “active networks”. In this paper, we describe the AEGIS architecture
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`forinitializing a computer system.It validates integrity at each layer transition in the bootstrap process.
`AEGISalsoincludes a recovery processforintegrity checkfailures, and we show howthis results in
`robust systems
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`Publishedin:
`
`Security and Privacy, 1997. Proceedings., 1997 IEEE Symposium on
`Date of Conference:
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`4-7 May 1997
`
`Page(s):
`65 - 71
`
`Meeting Date:
`04 May 1997-07 May 1997
`ISSN:
`1081-6011
`
`Print ISBN:
`0-8186-7828-3
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`INSPEC Accession Number:
`5602912
`
`Conference Location:
`Oakland, CA
`
`DOI:
`10.1109/SECPRI.1997.601317
`Publisher:
`IEEE
`
`
`
`Be 5
`pub i shed
`author In
`Bhat
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`HTC EX. 1028
`HTC v. Ancora
`
`US Patent No. 6,411,941
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`HTC EX. 1028
`HTC v. Ancora
`US Patent No. 6,411,941
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`12/15/2015
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`IEEE Xplore Abstract - A secure and reliable bootstrap architecture
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