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CCS
2007
ACM
14 years 1 months ago
Attribute-based encryption with non-monotonic access structures
We construct an Attribute-Based Encryption (ABE) scheme that allows a user’s private key to be expressed in terms of any access formula over attributes. Previous ABE schemes wer...
Rafail Ostrovsky, Amit Sahai, Brent Waters
CCS
2008
ACM
13 years 9 months ago
Efficient attributes for anonymous credentials
We extend the Camenisch-Lysyanskaya anonymous credential system such that selective disclosure of attributes becomes highly efficient. The resulting system significantly improves ...
Jan Camenisch, Thomas Groß
SP
2010
IEEE
206views Security Privacy» more  SP 2010»
13 years 11 months ago
Revocation Systems with Very Small Private Keys
In this work, we design a method for creating public key broadcast encryption systems. Our main technical innovation is based on a new “two equation” technique for revoking us...
Allison B. Lewko, Amit Sahai, Brent Waters
EUROPKI
2009
Springer
13 years 5 months ago
ABUSE: PKI for Real-World Email Trust
Current PKI-based email systems (such as X.509 S/MIME and PGP/ MIME) potentially enable a recipient to determine a name and organizational affiliation of the sender. This informati...
Chris Masone, Sean W. Smith
CRYPTO
2012
Springer
327views Cryptology» more  CRYPTO 2012»
11 years 10 months ago
Functional Encryption for Regular Languages
We provide a functional encryption system that supports functionality for regular languages. In our system a secret key is associated with a Deterministic Finite Automata (DFA) M....
Brent Waters