Cryptology ePrint Archive: Report 2012/449

Long Term Confidentiality: a Survey

Johannes Braun and Johannes Buchmann and Ciaran Mullan and Alex Wiesmaier

Abstract: Sensitive electronic data may be required to remain confi dential for long periods of time. Yet encryption under a computationally secure cryptosystem cannot provide a guarantee of long term confi dentiality, due to potential advances in computing power or cryptanalysis. Long term confi dentiality is ensured by information theoretically secure ciphers, but at the expense of impractical key agreement and key management. We overview known methods to alleviate these problems, whilst retaining some form of information theoretic security relevant for long term confi dentiality.

Category / Keywords: long term confidentiality, information theoretic security, perfect secrecy, everlasting security

Publication Info: The nal publication is available at (DOI : 10.1007/s10623-012-9747-6)

Date: received 6 Aug 2012, last revised 13 Sep 2012

Contact author: jbraun at cdc informatik tu-darmstadt de

Available format(s): PDF | BibTeX Citation

Note: Update to final version.

Version: 20120913:155343 (All versions of this report)

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