Experiment and Evaluation Clause Samples

Experiment and Evaluation. ‌ In order to evaluate the performance and the overhead of our BlendCAC scheme, two benchmark models, RBAC and ABAC, were also transcoded to separate smart contracts and enforced on the experimental web service system. All transcoded access control models had similar smart contract data structures, except for the type of authorization representation. In the RBAC-based smart contract, authorization was defined as the approach to bridge the relationship between the user and permission, and the ABAC-based smart contract used users’ attributes as a representative format for authorization. Both the RBAC and ABAC need a local database, either to maintain the user–role–permission or to manage the attribute-permission policy for authorization validation process. The profiles and policy rule management were developed using an embedded SQL database engine, called SQLite [44]. The lower memory and computation cost make the SQLite an ideal database solution for resource constrained systems like Raspberry Pi. All documents and source code are available on the BlendCAC project repository [45].