RSA-TBOS signcryption with proxy re-encryption

10 years 3 months ago
RSA-TBOS signcryption with proxy re-encryption
The recent attack on Apple iTunes Digital Rights Management [17] has brought to light the usefulness of proxy re-encryption schemes for Digital Rights Management. It is known that the use of proxy reencryption would have prevented the attack in [17]. With this utility in mind and with the added requirement of non-repudiation, we propose the first ever signcryption scheme with proxy re-encryption that does not involve bilinear maps. Our scheme is called RSA-TBOS-PRE and is based on the RSA-TBOS signcryption scheme of Mao and Malone-Lee [7]. We adapt various models available in the literature concerning authenticity, unforgeability and non-repudiation and propose a signature non-repudiation model suitable for signcryption schemes with proxy reencryption. We show the non-repudiability of our scheme in this model. We also introduce and define a new security notion of Weak-IND-CCA2, a slightly weakened adaptation of the IND-CCA2 security model for signcryption schemes and prove that RSA-TB...
Varad Kirtane, C. Pandu Rangan
Added 19 Oct 2010
Updated 19 Oct 2010
Type Conference
Year 2008
Where DRM
Authors Varad Kirtane, C. Pandu Rangan
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