Cryptology ePrint Archive: Report 2009/436

On the Connection between Signcryption and One-pass Key Establishment

M. Choudary Gorantla and Colin Boyd and Juan Manuel Gonz\'alez Nieto

Abstract: Key establishment between two parties that uses only one message transmission is referred to as one-pass key establishment (OPKE). OPKE provides the opportunity for very efficient constructions, even though they will typically provide a lower level of security than the corresponding multi-pass variants. In this paper, we explore the intuitive connection between signcryption and OPKE. By establishing a formal relationship between these two primitives, we show that with appropriate security notions, OPKE can be used as a signcryption KEM and vice versa. In order to establish the connection we explore the definitions of security for signcryption (KEM) and give new and generalised definitions. By making our generic constructions concrete we are able to provide new examples of signcryption KEMs and an OPKE protocol.

Category / Keywords: cryptographic protocols / One Pass Key establishment, Signcryption, Signcryption KEM

Publication Info: Preliminary version appeared in IMA Conference on Cryptography and Coding 2007

Date: received 5 Sep 2009

Contact author: mc gorantla at isi qut edu au

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Note: This is full version, submitted to Designs, Codes and Cryptography.

Version: 20090908:045802 (All versions of this report)

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