Privacy in Encrypted Content Distribution Using Private Broadcast Encryption [chapter]

Adam Barth, Dan Boneh, Brent Waters
2006 Lecture Notes in Computer Science  
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 discover that current systems for encrypting content to 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
more » ... ve attacker, while achieving ciphertext length, encryption time, and decryption time comparable with the non-private schemes currently used in encrypted file systems. * Supported by NSF.
doi:10.1007/11889663_4 fatcat:eqzpgt36qrcf5fl4uqrcr5bzm4