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CRYPTO
2005
Springer

Collusion Resistant Broadcast Encryption with Short Ciphertexts and Private Keys

11 years 10 months ago
Collusion Resistant Broadcast Encryption with Short Ciphertexts and Private Keys
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 ciphertexts and private keys are of constant size (only two group elements), for any subset of receivers. The public key size in this system is linear in the total number of receivers. Our second system is a generalization of the first that provides a tradeoff between ciphertext size and public key size. For example, we achieve a collusion resistant broadcast system for n users where both ciphertexts and public keys are of size O( √ n) for any subset of receivers. We discuss several applications of these systems.
Dan Boneh, Craig Gentry, Brent Waters
Added 26 Jun 2010
Updated 26 Jun 2010
Type Conference
Year 2005
Where CRYPTO
Authors Dan Boneh, Craig Gentry, Brent Waters
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