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Paper 2014/195
Low Overhead Broadcast Encryption from Multilinear Maps
Dan Boneh and Brent Waters and Mark Zhandry
Abstract
We use multilinear maps to provide a solution to the long-standing problem of public-key broadcast encryption where all parameters in the system are small. In our constructions, ciphertext overhead, private key size, and public key size are all poly-logarithmic in the total number of users. The systems are fully collusion-resistant against any number of colluders. All our systems are based on an O(log N)-way multilinear map to support a broadcast system for N users. We present three constructions based on different types of multilinear maps and providing different security guarantees. Our systems naturally give identity-based broadcast systems with short parameters.
Metadata
- Available format(s)
- Category
- Public-key cryptography
- Publication info
- A major revision of an IACR publication in CRYPTO 2014
- Keywords
- Broadcast encryptionmultilinear maps
- Contact author(s)
- mzhandry @ stanford edu
- History
- 2014-06-28: last of 2 revisions
- 2014-03-13: received
- See all versions
- Short URL
- https://ia.cr/2014/195
- License
-
CC BY