In this paper, we propose a semi-static secure broadcast encryption scheme with constant-sized private keys and ciphertexts. Our result improves the semi-static secure broadcast encryption scheme introduced by Gentry and Waters. Specifically, we reduce the private key and ciphertext size by half. By applying the generic transformation proposed by Gentry and Waters, our scheme also achieves adaptive security. Finally, we present an improved implementation idea which can reduce the ciphertext size in the aforementioned generic transformation.
|Number of pages||15|
|Journal||Lecture Notes in Computer Science|
|State||Published - 2014|
|Event||6th International Conference on Pairing-Based Cryptography, Pairing 2013 - Beijing, China|
Duration: 22 Nov 2013 → 24 Nov 2013
- broadcast encryption
- constant size