The paper “Efficient Extended ABAC Evaluation” by Charles Morisset (Newcastle University), Tim Willemse and Nicola Zannone (TU/e) has been accepted for presentation at the ACM Symposium on Access Control Models and Technologies (SACMAT 2018) in Indianapolis, IN, USA. The paper proposes an efficient, BDD-based method to evaluate extended ABAC policies, addressing attribute hiding attacks. A case study on two real-world policies illustrates the feasibility of the approach.