From key predistribution to key redistribution
نویسندگان
چکیده
منابع مشابه
Linear Key Predistribution Schemes
In a key predistribution scheme (KPS), some secret information is distributed among a set of users. This secret information must enable every user in some specified privileged groups to compute a common key associated to that group. Besides, this common key must remain unknown to some coalitions of users outside the privileged group. The information rate, that is, the ratio between the length o...
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A key assignment scheme is a model for enforcing an information flow policy using cryptographic techniques. Such schemes have been widely studied in recent years. Each security label is associated with a symmetric encryption key: data objects are encrypted and authorised users are supplied with the appropriate key(s). However, updates to encryption keys pose a significant problem, as the new ke...
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Key predistribution schemes for distributed sensor networks have received significant attention in the recent literature. In this paper we propose a new construction method for these schemes based on combinations of duals of standard block designs. Our method is a broad spectrum one which works for any intersection threshold. By varying the initial designs, we can generate various schemes and t...
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Key establishment in sensor networks is a challenging problem because asymmetric key cryptosystems are unsuitable for use in resource constrained sensor nodes, and also because the nodes could be physically compromised by an adversary. We present three new mechanisms for key establishment using the framework of pre-distributing a random set of keys to each node. First, in the q-composite keys s...
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Key establishment in sensor networks is a challenging problem because asymmetric key cryptosystems are unsuitable for use in resource constrained sensor nodes, and also because the nodes could be physically compromised by an adversary. We present three new mechanisms for key establishment using the framework of pre-distributing a random set of keys to each node. First, in the q-composite keys s...
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ژورنال
عنوان ژورنال: Theoretical Computer Science
سال: 2012
ISSN: 0304-3975
DOI: 10.1016/j.tcs.2012.06.001