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SBA Live Academy, What the heck is secure computing

"What the heck is secure computing?"

What is “secure computing”? Why should it be important to me? Now that it is important to me, how can I use secure computing for my work? This presentation will give an overview of the two main types of secure computing. We explain the fundamental ideas behind the technology and point out important details. We also present ideas on how this technology can be used for new applications, and last but not least, we answer your questions.

Speaker:
Matthias Gusenbauer,
Talk language: English

About the Speaker:
*********************

I am a researcher at SBA Research in Vienna, Austria. My research focuses on bridging people and technology to solve issues in security and privacy. In order to accomplish this I focus on usable security and privacy with an interest in applied cryptography.

I have been a research fellow at the National Institute of Informatics (NII) in Tokyo to work on visualizing network traces. During a second stay with the NII as part of Echizen Laboratory I worked on visualizing the Bitcoin blockchain. Now I continue to work in the domain of usable security, cryptography and privacy.

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SBA Live Academy, What the heck is secure computing

  1. 1. Klassifikation: Öffentlich Welcome to the SBA LiveAcademy #bleibdaheim #remotelearning Today: What the Heck is Secure Computing? by Matthias Gusenbauer You are automatically muted by entry, please use the chat for interacting with us. This talk will be recorded as soon as the presentation starts! Recording will end BEFORE the Q&A Session starts.
  2. 2. Klassifikation: Öffentlich What the Heck is Secure Computing and why should I care? SBA Research gGmbH, 2020
  3. 3. Klassifikation: Öffentlich 3 Whatis Secure Computing? • Compute on encrypted data o Secure Multiparty Computation (MPC) – Jointly compute on private data – "Data sharing without sharing data" o Fully Homomorphic Encryption (FHE) – Compute on ciphertext – Outsource computation without losing privacy SBA Research gGmbH, 2020
  4. 4. Klassifikation: Öffentlich 4 MPC vs FHE + - Basis MPC • Faster • More tool choice • More communication • Secret sharing • Oblivioustransfer FHE • Less communication • Slower • Less tool choice • Mathematical properties of ciphertext SBA Research gGmbH, 2020
  5. 5. Klassifikation: Öffentlich 5 MPC Example • Average salary of Academy participants • Only learn output (nothing else) • Secret sharing o Additive Secret Sharing SBA Research gGmbH, 2020
  6. 6. Klassifikation: Öffentlich 6 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR Z2: 2350 EURZ3: 2000 EUR
  7. 7. Klassifikation: Öffentlich 7 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR S1,1=1000 S1,2=250 S1,3=1250 Z2: 2350 EUR S2,1=150 S2,2=700 S2,3=1500 Z3: 2000 EUR S3,1=300 S3,2=800 S3,3=900
  8. 8. Klassifikation: Öffentlich 8 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR S1,1=1000 S1,2=250 S1,3=1250 Z2: 2350 EUR S2,1=150 S2,2=700 S2,3=1500 Z3: 2000 EUR S3,1=300 S3,2=800 S3,3=900 S3,2 | S2,3
  9. 9. Klassifikation: Öffentlich 9 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR S1,1=1000 S1,2=250 S1,3=1250 Z2: 2350 EUR S2,1=150 S2,2=700 S2,3=1500 Z3: 2000 EUR S3,1=300 S3,2=800 S3,3=900 Add S1,1+S2,1+S3,1 T1=1000+150+300=1450 Add S2,2+S1,2+S3,2 T2=700+250+800=1750 Add S3,3+S1,3+S2,3 T3=900+1250+1500=3650
  10. 10. Klassifikation: Öffentlich 10 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR S1,1=1000 S1,2=250 S1,3=1250 Z2: 2350 EUR S2,1=150 S2,2=700 S2,3=1500 Z3: 2000 EUR S3,1=300 S3,2=800 S3,3=900 Add S1,1+S2,1+S3,1 T1=1000+150+300=1450 Add S2,2+S1,2+S3,2 T2=700+250+800=1750 Add S3,3+S1,3+S2,3 T3=900+1250+1500=3650 T3 | T2
  11. 11. Klassifikation: Öffentlich 11 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR S1,1=1000 S1,2=250 S1,3=1250 Z2: 2350 EUR S2,1=150 S2,2=700 S2,3=1500 Z3: 2000 EUR S3,1=300 S3,2=800 S3,3=900 Add S1,1+S2,1+S3,1 T1=1000+150+300=1450 Add S2,2+S1,2+S3,2 T2=700+250+800=1750 Add S3,3+S1,3+S2,3 T3=900+1250+1500=3650 T1+T2+T3=SumFinal Average=SumFinal/3 = 2283,33
  12. 12. Klassifikation: Öffentlich 12 MPC Use Cases SBA Research gGmbH, 2020 Awesome Company C1 C3 C2 SecurityPrivacy
  13. 13. Klassifikation: Öffentlich 13 MPC Use Cases • Privacy o Machine learning o Credit score computation o Combining health data • Security o System resiliency o Remove single point of failure (e.g. key splitting) o Protection of assets SBA Research gGmbH, 2020
  14. 14. Klassifikation: Öffentlich 14 ImportantConsiderations • 2PC or MPC? • Honest or dishonest majority? • Semi-honest or malicious security? • Cryptography knowledge in house? o Some pitfalls (inadvertent leakage, performance) • Open to work with research code? o Proprietary platforms (tech support) o Open source tools (more choices) SBA Research gGmbH, 2020
  15. 15. Klassifikation: Öffentlich 15 Existing Tools • Proprietary o Unbound o Cybernetica (Sharemind) • Open source o JIFF o Scale-Mamba o … SBA Research gGmbH, 2020
  16. 16. Klassifikation: Öffentlich 16 My 3 Key Take-Aways 1. Secure Computation is possible (MPC) 2. MPC replaces trusted third parties 3. MPC can enable new business cases and increase my security SBA Research gGmbH, 2020
  17. 17. Klassifikation: Öffentlich 17 My Study • MPC adoption and lack thereof • 30-45 minute interview (recorded – 20 EUR Amazon voucher) • Strict protection of participants' privacy • https://de.surveymonkey.com/r/PCB29X9 (or send me an email) SBA Research gGmbH, 2020
  18. 18. Klassifikation: Öffentlich 18 Matthias Gusenbauer SBA Research gGmbH Floragasse 7, 1040 Wien MGusenbauer@sba-research.org SBA Research gGmbH, 2020
  19. 19. Klassifikation: Öffentlich 19 ProfessionalServices Penetration Testing Architecture Reviews Security Audit Security Trainings Incident Response Readiness ISMS & ISO 27001 Consulting Bridging Science and Industry Applied Research Industrial Security| IIoT Security| Mathematics for SecurityResearch | Machine Learning| Blockchain | Network Security| Sustainable Software Systems | Usable Security SBAResearch Knowledge Transfer SBA Live Academy | sec4dev | Trainings | Events | Teaching | sbaPRIME Contact us: anfragen@sba-research.org
  20. 20. Klassifikation: Öffentlich 20 References • Character images "Shadow Tactics – Blades of the Shogun • MPC overview paper "SoK: General Purpose Compilers for Secure Multi-Party Computation" by Hastings et al. • Unbound - https://www.unboundtech.com/ • Sharemind - https://sharemind.cyber.ee/ SBA Research gGmbH, 2020
  21. 21. Klassifikation: Öffentlich 21 #bleibdaheim #remotelearning Coming up @ SBA Live Academy Datum einfügen, 13.00 Uhr, live: „Talk Titel einfügen“ by „Speaker einfügen“ Join our MeetUp Group! https://www.meetup.com/Security-Meetup-by-SBA-Research/ Insert here a picture related to the next talk, if you don‘t get / find one use the Academy Picture
  22. 22. Klassifikation: Öffentlich 22 Abschnitt Untertitel für Abschnitt SBA Research gGmbH, 2020
  23. 23. Klassifikation: Öffentlich 23 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR S1,1=1000 S1,2=250 S1,3=1250 Z2: 2350 EUR S2,1=150 S2,2=700 S2,3=1500 Z3: 2000 EUR S3,1=300 S3,2=800 S3,3=900 Add S1,1+S2,1+S3,1 T1=1000+150+300=1450 Add S2,2+S1,2+S3,2 T2=700+250+800=1750 Add S3,3+S1,3+S2,3 T3=900+1250+1500=3650 T1+T2+T3=SumFinal Average=SumFinal/3 S3,2 | S2,3
  24. 24. Klassifikation: Öffentlich 24 MPC Example SBA Research gGmbH, 2020 Z1: 2500 EUR S1,1=1000 S1,2=250 S1,3=1250 Z2: 2350 EUR S2,1=150 S2,2=700 S2,3=1500 Z3: 2000 EUR S3,1=300 S3,2=800 S3,3=900 Add S1,1+S2,1+S3,1 T1=1000+150+300=1450 Add S2,2+S1,2+S3,2 T2=700+250+800=1750 Add S3,3+S1,3+S2,3 T3=900+1250+1500=3650 T1+T2+T3=SumFinal Average=SumFinal/3 T3 | T2

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