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Author Country (or Countries)

P. R. China

Abstract

Motivated by an identity-based broadcast encryption scheme from lattice[1] and a forward-secure identity-based encryption scheme[2], 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[3] in the random oracle model. In addition, our construction is believed to be secure against quantum computer.

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