two secure anonymous proxy based
play

Two Secure Anonymous Proxy-based Data Storages * Olivier Blazy 1 - PowerPoint PPT Presentation

Jan 10, 2023 •46 likes •556 views

Two Secure Anonymous Proxy-based Data Storages * Olivier Blazy 1 Xavier Bultel 2 Pascal Lafourcade 2 Universit de Limoges, Xlim, Limoges, France Clermont Universit Auvergne, LIMOS, Clermont-Ferrand, France July 29, 2016 SECRYPT 2016, Lisbon

  1. Two Secure Anonymous Proxy-based Data Storages * Olivier Blazy 1 Xavier Bultel 2 Pascal Lafourcade 2 Université de Limoges, Xlim, Limoges, France Clermont Université Auvergne, LIMOS, Clermont-Ferrand, France July 29, 2016 SECRYPT 2016, Lisbon * This research was conducted with the support of the “Digital Trust” Chair from the University of Auvergne Foundation. Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 1 / 20

  2. Proxy Re-Encryption (PRE) Alice ( pk a , sk a ) Bob ( pk b , sk b ) Proxy Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 2 / 20

  3. Proxy Re-Encryption (PRE) Alice ( pk a , sk a ) Bob ( pk b , sk b ) re-key rk b → a Proxy Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 2 / 20

  4. Proxy Re-Encryption (PRE) Alice ( pk a , sk a ) ( rk b → a ) Bob Offline Proxy Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 2 / 20

  5. Proxy Re-Encryption (PRE) Alice ( pk a , sk a ) ( rk b → a ) Bob Offline c Proxy c = E pk b ( m ) Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 2 / 20

  6. Proxy Re-Encryption (PRE) Alice ( pk a , sk a ) ( rk b → a ) Bob Offline c Proxy c ′ c ′ = RE rk b → a ( c ) c = E pk b ( m ) = E pk a ( m ) Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 2 / 20

  7. Proxy Re-Encryption (PRE) Alice ( pk a , sk a ) ( rk b → a ) Bob Offline c Proxy c ′ c ′ = RE rk b → a ( c ) c = E pk b ( m ) m = D sk a ( c ′ ) = E pk a ( m ) Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 2 / 20

  8. Proxy Re-Encryption (PRE) Alice ( pk a , sk a ) ( rk b → a ) Bob Offline c Proxy c ′ c ′ = RE rk b → a ( c ) c = E pk b ( m ) m = D sk a ( c ′ ) = E pk a ( m ) P learns nothing about m (IND-CPA). Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 2 / 20

  9. PRE History Blaze et al. (1998) First definition of PRE. Ivan et al. (2003) Formal treatment. Ateniese et al. (2006) Unidirectional PRE. Canetti et al. (2007) CCA security. Libert et al. (2007) Unidirectional + CCA. Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 3 / 20

  10. PRE History Blaze et al. (1998) First definition of PRE. Ivan et al. (2003) Formal treatment. Ateniese et al. (2006) Unidirectional PRE. New application: encrypted storage management . Canetti et al. (2007) CCA security. Libert et al. (2007) Unidirectional + CCA. Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 3 / 20

  11. PRE based storage Owner ( pk o , sk o ) User ( pk u , sk u ) Encrypted Proxy storage Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 4 / 20

  12. PRE based storage Owner ( pk o , sk o ) re-key rk o → u User ( pk u , sk u ) Encrypted Proxy storage Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 4 / 20

  13. PRE based storage Owner Offline User ( pk u , sk u ) rk o → u Encrypted Proxy storage Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 4 / 20

  14. PRE based storage Owner Offline User ( pk u , sk u ) rk o → u Encrypted file c ? file c ? Proxy storage Check user rights Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 4 / 20

  15. PRE based storage Owner Offline User ( pk u , sk u ) rk o → u c ′ = E pk u ( m ) c = E pk o ( m ) Encrypted Proxy storage c ′ = RE rk o → u ( c ) m = D sk u ( c ′ ) Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 4 / 20

  16. PRE based storage Semi-trust proxy: -No info about m Owner Offline - P knows U id. - P knows U rights - P knows c User ( pk u , sk u ) rk o → u c ′ = E pk u ( m ) c = E pk o ( m ) Encrypted Proxy storage c ′ = RE rk o → u ( c ) m = D sk u ( c ′ ) Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 4 / 20

  17. PRE based storage Semi-trust proxy: -No info about m Owner Offline - P knows U id. - P knows U rights - P knows c Goal: more privacy! User ( pk u , sk u ) rk o → u c ′ = E pk u ( m ) c = E pk o ( m ) Encrypted Proxy storage c ′ = RE rk o → u ( c ) m = D sk u ( c ′ ) Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 4 / 20

  18. PRE & anonymity? Ateniese et al. (2009) Anonymous re-encryption key. Shao et al. (2012) Anonymity for recipient message. Zheng et al. (2014) Anonymous re-encryption key + CCA. Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 5 / 20

  19. PRE & anonymity? Ateniese et al. (2009) Anonymous re-encryption key. Shao et al. (2012) Anonymity for recipient message. Zheng et al. (2014) Anonymous re-encryption key + CCA. → Only partial anonymity. Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 5 / 20

  20. Our idea Owner ( pkg i , skg i ) User Encrypted Proxy storage member of the group i Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 6 / 20

  21. Our idea Owner ( pkg i , skg i ) Member key MSK i proxy key K User Encrypted Proxy storage member of the group i Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 6 / 20

  22. Our idea Owner Offline User ( MSK i ) K Encrypted Proxy storage Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 6 / 20

  23. Our idea Owner Offline User ( MSK i ) K Encrypted file c ? Proxy storage Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 6 / 20

  24. Our idea Owner Offline User ( MSK i ) K c = E pkg i ( m ) Encrypted Proxy storage Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 6 / 20

  25. Our idea Owner Offline User ( MSK i ) K c = E pkg i ( m ) Encrypted Proxy storage User knows MSK i and c Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 6 / 20

  26. Our idea Owner Offline User ( MSK i ) K Encrypted Proxy storage Randomization with r MSK ′ i and c ′ Olivier Blazy, Xavier Bultel , Pascal Lafourcade (Université de Limoges, Xlim, Limoges, France, Clermont Université Auvergne, LIMOS, Cler Two Secure Anonymous Proxy-based Data Storages July 29, 2016 6 / 20

Download Presentation
Download Policy: The content available on the website is offered to you 'AS IS' for your personal information and use only. It cannot be commercialized, licensed, or distributed on other websites without prior consent from the author. To download a presentation, simply click this link. If you encounter any difficulties during the download process, it's possible that the publisher has removed the file from their server.

Recommend

COIN Secure and Anonymous Decentralized Bitcoin Mixing PARTY Jan

COIN Secure and Anonymous Decentralized Bitcoin Mixing PARTY Jan

COIN Secure and Anonymous Decentralized Bitcoin Mixing PARTY Jan Henrik Ziegeldorf, Roman Matzu7, Fred Grossmann, Mar;n Henze, Klaus Wehrle Communica;on and

492 views • 28 slides
Provably Secure Anonymous-yet-Accountable Crowdsensing with Scalable Sublinear Revocatjon Sazzadur

Provably Secure Anonymous-yet-Accountable Crowdsensing with Scalable Sublinear Revocatjon Sazzadur

PETS 2017 The 17th Privacy Enhancing T echnologies Symposium July 1821, 2017 Minneapolis, MN, USA Provably Secure Anonymous-yet-Accountable Crowdsensing with Scalable Sublinear Revocatjon Sazzadur Rahaman 1 , Long Cheng 1 , Danfeng (Daphne)

650 views • 18 slides
Beta Presentation Secure Application Layer API Proxy The Capstone Experience Team Symantec

Beta Presentation Secure Application Layer API Proxy The Capstone Experience Team Symantec

Beta Presentation Secure Application Layer API Proxy The Capstone Experience Team Symantec Lauren Allswede Steven Kneiser Jacob Carl TJ Kelly Yili Luo Department of Computer Science and Engineering Michigan State University Fall 2017

547 views • 12 slides
Alpha Presentation Secure Application Layer API Proxy The Capstone Experience Team Symantec

Alpha Presentation Secure Application Layer API Proxy The Capstone Experience Team Symantec

Alpha Presentation Secure Application Layer API Proxy The Capstone Experience Team Symantec Lauren Allswede Steven Kneiser Jacob Carl TJ Kelly Yili Luo Department of Computer Science and Engineering Michigan State University Fall 2017

225 views • 9 slides
I n t e r n s L i g h t n i n g T a l k s Proxy editing PiTiVi Proxy editing

I n t e r n s L i g h t n i n g T a l k s Proxy editing PiTiVi Proxy editing

I n t e r n s L i g h t n i n g T a l k s Proxy editing PiTiVi Proxy editing Anton Belka, antonbelka@gmail.com GUADEC 2013 The TM Conference GUADEC Proxy editing What is proxy editing? Proxy editing is the ability to

1.75k views • 143 slides
Project Plan Secure Application Layer API Proxy The Capstone Experience Team Symantec Lauren

Project Plan Secure Application Layer API Proxy The Capstone Experience Team Symantec Lauren

Project Plan Secure Application Layer API Proxy The Capstone Experience Team Symantec Lauren Allswede Steven Kneiser Jacob Carl TJ Kelly Yili Luo Department of Computer Science and Engineering Michigan State University Fall 2017 From

265 views • 12 slides
Web Proxy Caching Model Web Servers Aggregate Proxy Workload server Web Clients Factors and

Web Proxy Caching Model Web Servers Aggregate Proxy Workload server Web Clients Factors and

Web Proxy Caching Model Web Servers Aggregate Proxy Workload server Web Clients Factors and Levels Cache size Cache Replacement Policy Recency-based LRU Frequency-based LFU-Aging Size-based GD-Size Workload

303 views • 3 slides
Entwurfsmuster und Frameworks Proxy Oliver Haase Oliver Haase Emfra Proxy 1/14

Entwurfsmuster und Frameworks Proxy Oliver Haase Oliver Haase Emfra Proxy 1/14

Entwurfsmuster und Frameworks Proxy Oliver Haase Oliver Haase Emfra Proxy 1/14 Description I Classification : Object-based structural pattern Also known as : Surrogate Purpose : Control access to a subject through

435 views • 14 slides
January 29, 2018 Proxy Statements under Maryland Law 2018 The 2018 proxy season is here.

January 29, 2018 Proxy Statements under Maryland Law 2018 The 2018 proxy season is here.

January 29, 2018 Proxy Statements under Maryland Law 2018 The 2018 proxy season is here. Based on our experience reviewing proxy statements for Maryland public companies, we would like to call your attention to certain matters of Maryland

272 views • 12 slides
Mixminion: A next-generation anonymous remailer George Danezis Roger Dingledine Nick Mathewson

Mixminion: A next-generation anonymous remailer George Danezis Roger Dingledine Nick Mathewson

Mixminion: A next-generation anonymous remailer George Danezis Roger Dingledine Nick Mathewson 1 Outline Background Related systems A few improvements over past work Secure single-use reply block mechanism 2 Anonymous,

544 views • 22 slides
GLM Proxy Data Monte Bateman Proxy Data Creator Introduction GLM is an optical instrument

GLM Proxy Data Monte Bateman Proxy Data Creator Introduction GLM is an optical instrument

GLM Proxy Data Monte Bateman Proxy Data Creator Introduction GLM is an optical instrument Closest analog is LIS LIS is LEO; has a limited time on station for a particular storm Have several ground-based, 24x7 networks;

133 views • 10 slides
MySQL Proxy Making MySQL more flexible Jan Kneschke jan@mysql.com MySQL Proxy proxy-servers

MySQL Proxy Making MySQL more flexible Jan Kneschke jan@mysql.com MySQL Proxy proxy-servers

MySQL Proxy Making MySQL more flexible Jan Kneschke jan@mysql.com MySQL Proxy proxy-servers forward requests to backends and can transform, handle or block them released under the GPL see http://forge.mysql.com/wiki/MySQL_Proxy

945 views • 27 slides
Anonymous Tokens Michele Orr ia.cr/2020/072 1 Anonymous Tokens Michele Orr joint work

Anonymous Tokens Michele Orr ia.cr/2020/072 1 Anonymous Tokens Michele Orr joint work

Anonymous Tokens Michele Orr ia.cr/2020/072 1 Anonymous Tokens Michele Orr joint work with Ben Kreuter, Tancrde Lepoint, Mariana Raykova ia.cr/2020/072 1 Definition Anonymous tokens are lightweight, single-use anonymous credentials.

657 views • 61 slides
HIP-based P2PSIP proxy HIP RG Meeting 70 th IETF Vancouver Joakim Koskela HIP-based P2PSIP

HIP-based P2PSIP proxy HIP RG Meeting 70 th IETF Vancouver Joakim Koskela HIP-based P2PSIP

HIP-based P2PSIP proxy HIP RG Meeting 70 th IETF Vancouver Joakim Koskela HIP-based P2PSIP P2PSIP in general: replace SIP server architecture with a DHT Used for routing messages and locating peers & services New challenges

219 views • 8 slides
NTRUReEncrypt An Efficient Proxy Re-Encryption Scheme based on NTRU David Nu nez , Isaac Agudo,

NTRUReEncrypt An Efficient Proxy Re-Encryption Scheme based on NTRU David Nu nez , Isaac Agudo,

Outline Proxy Re-Encryption NTRU NTRUReEncrypt PS-NTRUReEncrypt Experimental results Conclusions NTRUReEncrypt An Efficient Proxy Re-Encryption Scheme based on NTRU David Nu nez , Isaac Agudo, and Javier Lopez Network, Information and

929 views • 38 slides
Anonymous classes Polymorphism Anonymous classes motivation You probably have many buttons

Anonymous classes Polymorphism Anonymous classes motivation You probably have many buttons

Two cool ideas: Anonymous classes Polymorphism Anonymous classes motivation You probably have many buttons and/or menu items in your VectorGraphics project Three approaches for responding to the events from selecting those buttons /

406 views • 6 slides
Chuan Liu Institute of Theoretical Physics School of Physics, Peking University Basic

Chuan Liu Institute of Theoretical Physics School of Physics, Peking University Basic

Chuan Liu Institute of Theoretical Physics School of Physics, Peking University Basic information Universities that would like to hire lattice faculty members List of corresponding persons How to apply How to survive

209 views • 9 slides
What Does BERT with Vision Look At? Liunian Harold Li Mark Yatskar Da Yin Cho-Jui Hsieh

What Does BERT with Vision Look At? Liunian Harold Li Mark Yatskar Da Yin Cho-Jui Hsieh

1 What Does BERT with Vision Look At? Liunian Harold Li Mark Yatskar Da Yin Cho-Jui Hsieh Kai-Wei Chang UCLA AI2 PKU UCLA UCLA A long version, VisualBERT: A Simple and Performant Baseline for Vision and Language is on Arxiv (Aug

240 views • 10 slides
University/Research Institute-Industry Linkages in Two Chinese Cities: Commercializing

University/Research Institute-Industry Linkages in Two Chinese Cities: Commercializing

University/Research Institute-Industry Linkages in Two Chinese Cities: Commercializing Technological Innovation Kun Chen Martin Kenney Graduate Student Professor Dept. of Anthropology

266 views • 14 slides
M etal-Insulator Transitions in a model for magnetic Weyl semimetal and graphite under high

M etal-Insulator Transitions in a model for magnetic Weyl semimetal and graphite under high

M etal-Insulator Transitions in a model for magnetic Weyl semimetal and graphite under high magnetic field Disorder-driven quantum phase transition in Weyl fermion semimetal Luo, Xu, Ohtsuki and RS, ArXiv:1710.00572v2, Liu, Ohtsuki and RS,

874 views • 38 slides
Outline Return-oriented programming (ROP) CSci 5271 Announcements Introduction to Computer

Outline Return-oriented programming (ROP) CSci 5271 Announcements Introduction to Computer

Outline Return-oriented programming (ROP) CSci 5271 Announcements Introduction to Computer Security Day 6: Low-level defenses and BCECHO counterattacks, part 2 Control-flow integrity (CFI) Stephen McCamant University of Minnesota, Computer

348 views • 8 slides
Developer Fluency: Achieving True Mastery in Software Projects Minghui Zhou, Audris

Developer Fluency: Achieving True Mastery in Software Projects Minghui Zhou, Audris

Developer Fluency: Achieving True Mastery in Software Projects Minghui Zhou, Audris Mockus zhmh@pku.edu.cn, audris@avaya.com Peking University, Avaya Research Labs, Beijing, China NJ, USA Agenda History

514 views • 23 slides
A geometric trapping approach to global regularity for 2D Navier-Stokes on manifolds Khang Manh

A geometric trapping approach to global regularity for 2D Navier-Stokes on manifolds Khang Manh

A geometric trapping approach to global regularity for 2D Navier-Stokes on manifolds Khang Manh Huynh Aynur Bulut October 20, 2020 1 Abstract We use frequency decomposition techniques to give a direct proof of global existence and regularity

605 views • 49 slides
Interactive Interface Design for Scalable Large Multivariate Volume Visualization Xiaoru Yuan

Interactive Interface Design for Scalable Large Multivariate Volume Visualization Xiaoru Yuan

Interactive Interface Design for Scalable Large Multivariate Volume Visualization Xiaoru Yuan Key Laboratory on Machine Perception, MOE School of EECS, Peking University Nov. 13 th 2011 Ultrascale Visualization Workshop November 13, 2011

485 views • 46 slides

More recommend