| 大会名称 |
|---|
| 2010年 情報科学技術フォーラム(FIT) |
| 大会コ－ド |
| F |
| 開催年 |
| 2010 |
| 発行日 |
| 2010/8/20 |
| セッション番号 |
| 7Q |
| セッション名 |
| クラウドとデータ統合 |
| 講演日 |
| 2010/09/09 |
| 講演場所(会議室等) |
| Q会場（ウエスト2号館3F 第5講義室） |
| 講演番号 |
| D-031 |
| タイトル |
| Preserving Integrity and Confidentiality of a Directed Acyclic Graph Model of Provenance |
| 著者名 |
| Syalim Amril, Nishide Takashi, Sakurai Kouichi, |
| キーワード |
| Database Encryption, Provenance Security, Path-based Access Control |
| 抄録 |
|
This paper describes how to preserve integrity and confidentiality of a directed acyclic graph (DAG) model of provenance database. We show a method to preserve integrity by using digital signature where both of the provenance owner and the process executors (i.e. contributors) sign the nodes and the relationships between nodes in the provenance graph so that attacks to integrity can be detected by checking the signatures. To preserve confidentiality of the nodes and edges in the provenance graph we propose an access control model based on paths on the provenance graph because an auditor who need to audit a result normally need to access all nodes that have causal relationship with the result (i.e. all nodes that have a path to the result). We also complement the path-based access control with a compartment-based access control where each node is classified into compartments and the auditor is not allowed to access the nodes included in a compartment that can not be accessed by him/her (because of the sensitivity of the compartment). We implement the path-based access control by encrypting the nodes and later store encrypted encryption's keys in the children of the nodes. The compartment-based access control is implemented by encrypting the nodes in different compartments with different keys. We developed a prototype of the model and performed experiments to measure the overhead of digital signature and the double encryptions. |
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