NDLI: Poster: attribute based broadcast encryption with permanent revocation

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Poster: attribute based broadcast encryption with permanent revocation

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Poster: attribute based broadcast encryption with permanent revocation

Content Provider	ACM Digital Library
Author	Kopeetsky, Marina Dolev, Shlomi Gilboa, Niv
Abstract	We propose a new and efficient scheme for broadcast encryption. A broadcast encryption system allows a broadcaster to send an encrypted message to a dynamically chosen subset RS, \|RS\|=n of a given set of users, such that only users in this subset can decrypt the message. An important component of broadcast encryption schemes is revocation of users by the broadcaster, thereby updating the subset RS. Revocation may be either temporary, for a specific ciphertext, or permanent. We present the first public key broadcast encryption scheme that support permanent revocation of users. Our scheme is fully collusion resistant. In other words, even if all the users in the network collude with a revoked user, the revoked user cannot encrypt messages without receiving new keys from the broadcaster. The procedure is based on Cipher-text Policy Attribute-Based Encryption (CP-ABE). The overhead of our system is O(log n) in all major performance measures including length of private and public keys, computational complexity, user's storage space, and computational complexity of encryption and decryption.
Starting Page	757
Ending Page	760
Page Count	4
File Format	PDF
ISBN	9781450309486
DOI	10.1145/2046707.2093486
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2011-10-17
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Attribute based encryption Broadcast encryption
Content Type	Text
Resource Type	Article

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