Please use this identifier to cite or link to this item: https://doi.org/10.1109/ISIT.2008.4595309
Title: On compression of cryptographic keys
Authors: Chan, A.C.-F. 
Issue Date: 2008
Source: 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
URI: http://scholarbank.nus.edu.sg/handle/10635/42091
ISBN: 9781424422579
DOI: 10.1109/ISIT.2008.4595309
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