Unlinkable content playbacks in a multiparty DRM system

Petrlic, Ronald and Sekula, Stephan
(2013) Unlinkable content playbacks in a multiparty DRM system.
In: Data and Applications Security and Privacy XXVII.

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We present a solution to the problem of privacy invasion in a multiparty digital rights management scheme. (Roaming) users buy content licenses from a content provider and execute it at any nearby content distributor. Our approach, which does not need any trusted third party - in contrast to most related work on privacy-preserving DRM - is based on a re-encryption scheme that runs on any mobile Android device. Only a minor security-critical part needs to be performed on the device's smartcard which could, for instance, be a SIM card.


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