Hierarchical Access Control Using the Secure Filter

概要

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Access control plays an important role in the area of information security, which guarantees that any access to data is authorized. Hierarchical access control is a special access control model in distributed environment, in which each user protects his local data using a secret key;moreover, for any two related users u_i and u_j, u_i can access u_j's data if, and only if, u_i's priority is higher than u_j. Therefore, there should be a way for u_i to obtain the secret key of u_j if u_i's priority is higher than u_j. This paper presents an efficient solution to the problem. A special kind of function called secure filter is used as the building block of the proposed solution. In the solution, an authorized user can acquire correct keys efficiently and securely via secure filters. The proposed solution is also well-performed while inserting/deleting users, injecting/removing relations, and changing secret keys. Especially, only deleting users and removing relations will change some keys in the system, other operations can be performed freely without affecting other keys in the system;only secure filters need to be modified in these cases.
社団法人電子情報通信学会の論文
2001-06-01