Motivated by an identity-based broadcast encryption scheme from lattice and a forward-secure identity-based encryption scheme, we propose a forward-secure identity-based broadcast encryption scheme from lattice by adding the forward-security mechanism on broadcast encryption scheme. Our scheme satisfies the security requirements of both the broadcast encryption scheme and forward-security scheme, that is, it is forward-secure for the secret keys used previously, and we prove that it is semantic secure based on LWE (Learning With Error)assumption in the random oracle model. In addition, our construction is believed to be secure against quantum computer.
Zhang, Xinwen and Wang, Shangping
"Forward-Secure Identity-based Broadcast Encryption Scheme from Lattice,"
Applied Mathematics & Information Sciences: Vol. 09
, Article 39.
Available at: https://dc.naturalspublishing.com/amis/vol09/iss4/39