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- W2949778071 abstract "Key insulation (KI) and Intrusion resilience (IR) are methods to protect a user’s key against exposure by utilizing periodic communications with an auxiliary helper. But existing work assumes a secure channel between user and helper. If we want to realize KI or IR in practice we must realize this secure channel. This paper looks at the question of how to do this when the communication is over what we are more likely to have in practice, namely a public channel such as the Internet or a wireless network. We explain why this problem is not trivial, introduce models and definitions that capture the desired security in a public channel setting, and provide a complete (and surprising) answer to the question of when KI and IR are possible over a public channel. The information we provide is important to guide practitioners with regard to the usage of KI and IR and also to guide future research in this area. ∗Dept. of Computer Science & Engineering, University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA. E-Mail: mihir@cs.ucsd.edu. URL: http://www-cse.ucsd.edu/users/mihir. Supported in part by NSF grant CNS 0524765 and CNS 0627779 and a gift from Intel corporation. †Dept. of Computer Science & Engineering, University of California at San Diego, 9500 Gilman Drive, La Jolla, California 92093, USA. E-Mail: shduan@cs.ucsd.edu. URL: http://www-cse.ucsd.edu/users/shduan. Supported in part by the grants of the first author. ‡Computer Science Department, Bowdoin College, 8650 College Station, Brunswick, ME 04011-8486, USA. EMail: apalacio@bowdoin.edu. URL: http://academic.bowdoin.edu/faculty/A/apalacio/." @default.
- W2949778071 created "2019-06-27" @default.
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- W2949778071 date "2009-01-01" @default.
- W2949778071 modified "2023-09-23" @default.
- W2949778071 title "Key Insulation and Intrusion Resilience Over a Public Channel." @default.
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