DS-CKDSE: デュアルサーバー連想キーワード動的検索可能暗号化(フォワードおよびバックワードセキュリティ付き)
Haiyan Sun1, Yihua Liu1, Yanhua Zhang2
1Software Engineering College, Zhengzhou University of Light Industry, Zhengzhou 450001, China.
Entropy (Basel, Switzerland)
|January 28, 2026
まとめ
本研究では、デュアルサーバー連想キーワード動的検索可能暗号化(DSE)スキームであるDS-CKDSEを紹介します。これは、キーワードペア結果パターン(KPRP)の漏洩を防ぎ、暗号化されたクラウドデータのフォワード/バックワードセキュリティを達成することでセキュリティを強化します。
科学分野:
- コンピュータサイエンス
- 暗号理論
- クラウドセキュリティ
背景:
- 動的検索可能暗号化(DSE)は、安全なクラウドデータ検索に不可欠である。
- 既存のシングルサーバーDSEスキームは、キーワードペア結果パターン(KPRP)の漏洩に悩まされており、同時フォワード/バックワードセキュリティが欠如している。
研究 の 目的:
- 新しいデュアルサーバー連想キーワードDSEスキーム(DS-CKDSE)を提案する。
- KPRP漏洩に対処し、堅牢なフォワードおよびバックワードセキュリティを達成する。
- 暗号化されたデータに対する効率的な連想クエリをサポートする。
主な方法:
- デュアルサーバーアーキテクチャを採用する。
- 安全なインデックスは、完全二分木と識別不可能なブルームフィルタ(IBF)を使用して構築される。
- ランダム状態の更新、デュアルステート配列、およびタイムスタンプのトラップドアにより、セキュリティと機能性が保証される。
主要な成果:
- DS-CKDSEスキームは、インデックスストレージとトラップドア検証を分離することにより、KPRP漏洩を軽減する。
- 定義された漏洩関数の下で、適応的セキュリティを満たす。
- 実験結果は、更新および検索操作における高い効率を示している。
結論:
- 提案されたデュアルサーバーDSEスキームは、機密性の高いクラウドデータ検索のセキュリティと効率を効果的に向上させる。
- パフォーマンスを維持しながら、既知の漏洩攻撃に対する堅牢なソリューションを提供する。
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