An Adaptively Secure KP-ABE Scheme Supporting User's Private Key Revocation
Zhang Li-wu · Journal of Chinese Computer Systems · 2012
User's private key revocation is crucial to the practical use of ABE.The existing ABE schemes supporting user's private key revocation could revoke user's private key by introducing the concept of the user's identity and revoking user's identity.But the security of these schemes could only reach selective security.Based on the idea of the existing schemes,we construct an adaptively secure KP-ABE scheme supporting user's private key revocation on composite order bilinear groups by combining Lewko's adaptively secure ABE scheme and Leyou Zhang's adaptively secure identity-based broadcast encryption scheme.