SPEAKER:
Kristiyan Haralambiev

TITLE:
Dual System Encryption and Recent IBE/HIBE Constructions

AUTHORS:
Waters '09 and Lweko & Waters '09

ABSTRACT:
We study the dual system encryption concept, recently introduced by
Waters, following the presentation of Lewko and Waters: Fully Secure
HIBE with Short Ciphertexts ( http://eprint.iacr.org/2009/482 ). Their
construction looks quite similar to the Boneh-Boyen IBE and
Boneh-Boyen-Goh HIBE which were shown to be only selectively secure.
The scheme works in composite order groups (of three primes) and is
secure under three static assumptions analogously to the composite
order group construction of Waters the techniques of which were
adopted for the main result of Waters'  Crypto'09 paper
(http://eprint.iacr.org/2009/385 ).
If time permits, we will discuss that result as well due to its
security being shown under the well
known DBDH and DLIN assumptions.

ONLINE VERSION:
http://eprint.iacr.org/2009/385
http://eprint.iacr.org/2009/482