Cryptography is an indispensable tool used to protect information in computing systems. It is
used everywhere and by billions of people worldwide on a daily basis. It is used to protect …

Abstract We present a Hierarchical Identity Based Encryption (HIBE) system where the
ciphertext consists of just three group elements and decryption requires only two bilinear …

We describe two new public key broadcast encryption systems for stateless receivers. Both
systems are fully secure against any number of colluders. In our first construction both …

In many important applications, a collection of mutually distrustful parties must perform
private computation over multisets. Each party's input to the function is his private input …

We identify and fill some gaps with regard to consistency (the extent to which false positives
are produced) for public-key encryption with keyword search (PEKS). We define …

In this work, we show how to use indistinguishability obfuscation to build multiparty key
exchange, efficient broadcast encryption, and efficient traitor tracing. Our schemes enjoy …

This paper describes the first identity-based broadcast encryption scheme (IBBE) with
constant size ciphertexts and private keys. In our scheme, the public key is of size linear in …

We present new techniques for achieving adaptive security in broadcast encryption systems.
Previous work on fully collusion resistant broadcast encryption systems with very short …

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 users …

We construct a fully collusion resistant tracing traitors system with sublinear size ciphertexts
and constant size private keys. More precisely, let N be the total number of users. Our …