Private encrypted content distribution using private broadcast encryption
Authors: A. Barth, D. Boneh, and B. Waters
Abstract:
In many content distribution systems it is important to both restrict access
of content to authorized users and to protect the identities of these users.
We show that current systems for encrypting content to a set of users are
subject to attacks on user privacy. We propose a new mechanism, private
broadcast encryption, to protect the privacy of users of encrypted file
systems and content delivery systems. We construct a private broadcast
scheme, with a strong privacy guarantee against an active attacker, while
achieving ciphertext length, encryption time, and decryption time comparable
with the non-private schemes currently used in encrypted file systems.
Reference:
In proceedings of Financial Crypto (FC) '06, 2006, LNCS 4107, pp. 52-64
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