An Adaptively Secure Multi-Authority Ciphertext-Policy ABE Scheme on Prime Order Groups
Li Qiu · Dianzi xuebao · 2014
Previous adaptively secure multi-authority attribute-based encryption( ABE) schemes suffered from superfluous computation overhead on composite order groups. To tackle this problem,an adaptively secure multi-authority ciphertext-policy ABE( MA-CP-ABE) scheme on prime order groups was proposed when a dual pairing vector space approach was employed. The proposed scheme supports any monotone access structure,and is proven adaptively secure from the decisional linear assumption in the standard model. Performance analysis indicates that our scheme is more efficient while achieving the adaptive security.