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|Title:||On compression of cryptographic keys|
|Citation:||Chan, A.C.-F. (2008). On compression of cryptographic keys. IEEE International Symposium on Information Theory - Proceedings : 1853-1857. ScholarBank@NUS Repository. https://doi.org/10.1109/ISIT.2008.4595309|
|Abstract:||Any secured system can be modeled as a capabilitybased access control system in which each user is given a set of secret keys of the resources he is granted access to. In some systems which are sensitive to key storage cost, key derivation is commonly used. With a goal to minimize the maximum key storage per user, key compression based on key linking, that is, deriving one key from another without compromising security, is studied. A lower bound on key storage needed for a general access structure with key derivation is derived. This bound demonstrates the theoretic limit of any systems which do not trade off security and can be treated as a negative result to provide ground for designs with security tradeoff. A concrete, provably secure key linking scheme based on pseudorandom functions is given, along with an algorithm for finding optimal key linking patterns. © 2008 IEEE.|
|Source Title:||IEEE International Symposium on Information Theory - Proceedings|
|Appears in Collections:||Staff Publications|
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