Protection against internal leakage of sensitive data using a time-bounded key management system

• Project/Area Number: 16K00185
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Information security
• Research Institution: Okayama University
• Principal Investigator: Kuribayashi Minoru 岡山大学, 自然科学研究科, 准教授 (50346235)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Project Status: Completed (Fiscal Year 2018)
• Budget Amount: ¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000); Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000); Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000); Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 電子指紋 / 結託耐性符号 / 暗号プロトコル / 電子透かし / 高機能暗号 / 最適な検出器 / PDFファイル / アクセス制御 / 鍵管理 / 結託耐性 / 時限付鍵管理 / 電子指紋技術 / 不正者追跡

Outline of Final Research Achievements

It is difficult to prevent a malicious user who has privilege in an organization from leaking sensitive data even if an encryption tool is used. In this study, we proposed a secure data management system which gives permission for users by access control technique based on cryptographic tools and allows a system manager to identify traitors from leaked file. The traceability is realized by embedding digital fingerprint of the user who access to the file. We proposed a method for embedding such a fingerprint into PDF document and implement on a management system. The fingerprint is encoded by a collusion secure code so as to tolerate a collusion attack by a coalition of traitors. We proposed an optimal detector by estimating the collusion strategy and the number of traitors from the information extracted from a pirated copy.

Academic Significance and Societal Importance of the Research Achievements

本研究により，機密データの管理システムにおいて，暗号化ツールだけでは防ぐことが難しかったスパイのような内部犯罪者による情報漏洩対策を施すことを可能にした．本成果では，漏洩自体を防ぐことは困難であるが，漏洩した場合にそのファイルを検挙できれば，不正者が誰であるかを特定することが可能である．それゆえ，本システムが導入されていることが広く認識されれば，情報漏洩の抑止に繋がるものと考えられる．本システムは，クラウド環境においても比較的高速に動作させることが可能であり，適用できる範囲は広い．安全なデータ管理において，本研究で得られた成果を応用させれば，産業スパイによる情報漏洩抑止が期待できる．

Research Products

• [Int'l Joint Research] Ahmedabad University(インド)
• [Int'l Joint Research] Norwegian University of Sci. and Tech.(ノルウェー)
• [Int'l Joint Research] NTNU Norwegian University/of Science and Technology(Norway)
• [Int'l Joint Research] Ahmedabad University(India)
• [Int'l Joint Research] Alesund University(Norway)
• [Int'l Joint Research] National University of Singapore(Singapore)
• [Journal Article] Robust and Secure Data Hiding for PDF Text Document (2019)
  • Author(s): M. Kuribayashi, T. Fukushima, and N. Funabiki
  • Journal Title: IEICE Transactions on Information and Systems Volume: E102.D Issue: 1 Pages: 41-47
  • DOI: 10.1587/transinf.2018MUP0003
  • NAID: 130007542013
  • ISSN: 0916-8532, 1745-1361
  • Year and Date: 2019-01-01
  • Peer Reviewed
• [Journal Article] Decentralized tracing protocol for fingerprinting system (2019)
  • Author(s): M. Kuribayashi and N. Funabiki
  • Journal Title: APSIPA Trans. Signal and Information Processing Volume: vol.8 Issue: 1 Pages: 1-8
  • DOI: 10.1017/atsip.2018.28
  • Peer Reviewed / Open Access
• [Journal Article] Bias-based binary fingerprinting code under erasure channel (2018)
  • Author(s): M. Kuribayashi
  • Journal Title: IEEE Signal Processing Letters Volume: vol.25, no.9 Issue: 9 Pages: 1423-1427
  • DOI: 10.1109/lsp.2018.2863034
  • Peer Reviewed
• [Journal Article] Fingerprinting for multimedia content broadcasting system (2018)
  • Author(s): M. Kuribayashi and N. Funabiki
  • Journal Title: Journal of Information Security and Applications Volume: vol.41 Pages: 52-61
  • DOI: 10.1016/j.jisa.2018.06.002
  • Peer Reviewed
• [Journal Article] Universal Scoring Function Based on Bias Equalizer for Bias-Based Fingerprinting Codes (2018)
  • Author(s): Minoru Kuribayashi, Nobuo Funabiki
  • Journal Title: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Volume: E101.A Issue: 1 Pages: 119-128
  • DOI: 10.1587/transfun.E101.A.119
  • NAID: 130006300809
  • ISSN: 0916-8508, 1745-1337
  • Peer Reviewed
• [Journal Article] Reversible data hiding based compressible privacy preserving system for color image (2018)
  • Author(s): Vaibhav B. Joshi, Mehul S. Raval, Minoru Kuribayashi
  • Journal Title: Multimedia Tools and Applications Volume: 印刷中 Issue: 13 Pages: 16597-16622
  • DOI: 10.1007/s11042-017-5230-8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Obfuscation in digital fingerprinting (2017)
  • Author(s): Hans Georg Schaathun, Minoru Kuribayashi
  • Journal Title: International Journal on Information and Coding Theory Volume: 4 Issue: 2/3 Pages: 185-200
  • DOI: 10.1504/ijicot.2017.10004711
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Secure data management system with traceability against internal leakage (2017)
  • Author(s): Minoru Kuribayashi, Takahiro Ueda, Nobuo Funabiki
  • Journal Title: Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2017) Volume: - Pages: 1486-1494
  • DOI: 10.1109/apsipa.2017.8282268
  • Peer Reviewed
• [Journal Article] Data hiding for text document in PDF file (2017)
  • Author(s): Minoru Kuribayashi, Takuya Fukushima, Nobuo Funabiki
  • Journal Title: Smart Innovation, Systems and Technologies Volume: 81 Pages: 390-398
  • DOI: 10.1007/978-3-319-63856-0_47
  • ISBN: 9783319638553, 9783319638560
  • Peer Reviewed
• [Journal Article] Aesthetic QR Code Based on Modified Systematic Encoding Function (2017)
  • Author(s): Minoru Kuribayashi and Morii Morii
  • Journal Title: IEICE Transactions on Information and Systems Volume: E100.D Issue: 1 Pages: 42-51
  • DOI: 10.1587/transinf.2016MUP0002
  • NAID: 130005188291
  • ISSN: 0916-8532, 1745-1361
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] DCT-OFDM Watermarking Scheme Based on Communication System Model (2017)
  • Author(s): Minoru Kuribayashi, Shogo Shigemoto and Nobuo Funabiki
  • Journal Title: IEICE Transactions on Fundamentals of Electronics, Communications and Computer Sciences Volume: E100.A Issue: 4 Pages: 944-952
  • DOI: 10.1587/transfun.E100.A.944
  • NAID: 130005529521
  • ISSN: 0916-8508, 1745-1337
  • Peer Reviewed / Acknowledgement Compliant
• [Journal Article] Watermarking with fixed decoder for aesthetic 2D barcode (2017)
  • Author(s): Minoru Kuribayashi, Ee-Chien. Chang and Nobuo Funabiki
  • Journal Title: Lecture Notes in Computer Science Volume: 10082 Pages: 379-392
  • DOI: 10.1007/978-3-319-53465-7_28
  • ISBN: 9783319534640, 9783319534657
  • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
• [Presentation] 雑音環境における電子指紋符号に対する結託攻撃の攻撃戦略推定 (2019)
  • Author(s): 安井達哉, 栗林稔, 舩曵信生
  • Organizer: 電子通信学会EMM研究会
• [Presentation] Delegated tracing protocol for asymmetric fingerprinting (2019)
  • Author(s): M. Kuribayashi and N. Funabiki
  • Organizer: The 2019 Symp. on Cryptography and Information Security (SCIS2019)
• [Presentation] Optimal error correcting decoder with self-synchronization capability (2019)
  • Author(s): M. Kuribayashi and N. Funabiki
  • Organizer: Technical Report of IEICE, EMM, Jan.
• [Presentation] Efficient decoding algorithm for cyclically permutable code (2018)
  • Author(s): M. Kuribayashi, S. Suma, N. Funabiki
  • Organizer: 2018 IEEE Information Theory Workshop (ITW2018)
  • Int'l Joint Research
• [Presentation] Estimation of collusion attack in bias-based binary fingerprinting code (2018)
  • Author(s): T. Yasui, M. Kuribayashi, N. Funabiki, and I. Echizen
  • Organizer: Asia-Pacific Signal and Information Processing Association Anual Sumit and Conf. (APSIPA ASC 2018)
  • Int'l Joint Research
• [Presentation] Secure data management system with traceability against internal leakage (2018)
  • Author(s): M. Kuribayashi, T. Ueda, and N. Funabiki
  • Organizer: Asia-Pacific Signal and Information Processing Association Anual Sumit and Conf. (APSIPA ASC 2017)
  • Int'l Joint Research
• [Presentation] PDF文書に対する電子指紋システムへの適用を考慮した行セグメント分割埋め込み法 (2018)
  • Author(s): 福島拓哉, 栗林稔, 舩曵信生
  • Organizer: 電子通信学会EMM研究会
• [Presentation] 組織内の情報漏洩を抑止するための電子指紋システムの実装評価 (2018)
  • Author(s): 上田貴大, 栗林稔, 舩曵信生
  • Organizer: 電子通信学会EMM研究会
• [Presentation] 電子指紋符号における不正者検出のための動的戦略推定 (2018)
  • Author(s): 安井達哉, 栗林稔, 舩曵信生
  • Organizer: 電子通信学会EMM研究会
• [Presentation] Cyclically Permutable Codeの同期回復と誤り訂正に関する考察 (2018)
  • Author(s): 須磨尚大, 栗林稔, 舩曵信生
  • Organizer: 電子通信学会EMM研究会
• [Presentation] 画像の局所的な特徴を考慮したデザインQRコードに関する考察 (2018)
  • Author(s): 栗林稔, 村上元貴, 舩曵信生
  • Organizer: 電子通信学会EMM研究会
• [Presentation] 電子指紋符号における結託攻撃の戦略推定 (2018)
  • Author(s): 安井達哉, 栗林稔, 舩曵信生
  • Organizer: 信学技報, EMM 3月
• [Presentation] データハイディング技術における攻撃耐性 ～ ロバスト性と安全性 ～ (2018)
  • Author(s): 栗林稔
  • Organizer: 信学技報, EMM 3月
  • Invited
• [Presentation] A study of tracing algorithm for fingerprinting code considering erasure symbols (2018)
  • Author(s): Minoru Kuribayashi, Nobuo Funabiki
  • Organizer: Technical Report of IEICE, EMM Jan.
• [Presentation] 組織内からの情報漏洩対策のための電子指紋システムの提案 (2017)
  • Author(s): 上田貴大, 栗林稔, 舩曵信生
  • Organizer: 電子情報通信学会 EMM研究会
  • Place of Presentation: 山形
  • Year and Date: 2017-05-22
• [Presentation] PDFファイルの内部構造を考慮した大容量電子透かし法 (2017)
  • Author(s): 福島拓哉, 栗林稔, 舩曵信生
  • Organizer: 電子情報通信学会 EMM研究会
  • Place of Presentation: 山形
  • Year and Date: 2017-05-22
• [Presentation] Universal scoring functions for bias-based fingerprinting code under relaxed marking assumption (2017)
  • Author(s): Minoru Kuribayashi and Nobuo Funabiki
  • Organizer: 2017 Symposium on Cryptography and Information Security
  • Place of Presentation: Okinawa
  • Year and Date: 2017-01-24
• [Presentation] Secure data management system with traceability against internal leakage (2017)
  • Author(s): Minoru Kuribayashi, Takahiro Ueda, Nobuo Funabiki
  • Organizer: Asia-Pacific Signal and Information Processing Association Annual Summit and Conference (APSIPA ASC 2017)
  • Int'l Joint Research
• [Presentation] Fingerprinting system for secure manegement of sensitive data (2017)
  • Author(s): Takahiro Ueda, Minoru Kuribayashi, Nobuo Funabiki
  • Organizer: International Workshop on Security (IWSEC2017)
  • Int'l Joint Research
• [Presentation] Imperceptible watermarking scheme with large capacity considering the internal structure of PDF file (2017)
  • Author(s): Takuya Fukushima, Minoru Kuribayashi, Nobuo Funabiki
  • Organizer: International Workshop on Security (IWSEC2017)
  • Int'l Joint Research
• [Presentation] Data hiding for text document in PDF file (2017)
  • Author(s): Minoru Kuribayashi, Takuya Fukushima, Nobuo Funabiki
  • Organizer: The Thirteenth International Conference on Intelligent Information Hiding and Multimedia Signal Processing
  • Int'l Joint Research
• [Presentation] Compression-friendly reversible data hiding for privacy protection (2017)
  • Author(s): Minoru Kuribayashi, Vaibhav B. Joshi, Mehul S. Raval
  • Organizer: Technical Report of IEICE, EMM Nov.
• [Presentation] 誤り訂正符号を用いたDCT-OFDM型電子透かし方式の耐性向上に関する考察 (2017)
  • Author(s): 重本章吾, 栗林稔, 舩曵信生
  • Organizer: 信学技報, EMM 11月
• [Presentation] 電子透かし方式の安全性を高めるための難読化処理に関する考察 (2017)
  • Author(s): 山下晃一郎, 栗林稔, 舩曵信生
  • Organizer: 信学技報, EMM 11月
• [Presentation] PDFファイルの内部構造を考慮した大容量電子透かし法 (2017)
  • Author(s): 福島拓哉, 栗林稔, 舩曵信生
  • Organizer: 信学技報, EMM 5月
• [Presentation] 組織内からの情報漏洩対策のための電子指紋システムの提案 (2017)
  • Author(s): 上田貴大, 栗林稔, 舩曵信生
  • Organizer: 信学技報, EMM 5月
• [Presentation] 任意の画像のQRコード化とそのアプリ開発 (2016)
  • Author(s): 行地将智, 栗林稔, Ee-Chien Chang, 舩曵信生, 石原信也
  • Organizer: 電子情報通信学会 EMM研究会
  • Place of Presentation: 大分
  • Year and Date: 2016-11-17
• [Presentation] Watermarking with fixed decoder for aesthetic 2D barcode (2016)
  • Author(s): Minoru Kuribayashi, Ee-Chien. Chang and Nobuo Funabiki
  • Organizer: 15th Int. Workshop Digital-forensics and Watermarking (IWDW2016)
  • Place of Presentation: Beijing, China
  • Year and Date: 2016-09-17
  • Int'l Joint Research
• [Presentation] ケルクホフスの原理に基づく電子透かし方式の安全性において特徴選出および信号処理の重要性 (2016)
  • Author(s): 山下晃一郎, 栗林稔, 舩曵信生
  • Organizer: 電子情報通信学会 EMM研究会
  • Place of Presentation: 山口
  • Year and Date: 2016-07-14
• [Presentation] 雑音特性を考慮した電子透かし方式への誤り訂正符号の適用と考察 (2016)
  • Author(s): 重本章吾, 栗林稔, 舩曵信生
  • Organizer: 電子情報通信学会 EMM研究会
  • Place of Presentation: 山口
  • Year and Date: 2016-07-14