Difference between revisions of "AFSecurity Seminar"

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== TBD ==
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== Transport-level privacy for instant messaging ==
  
 
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| '''TIME:'''&nbsp; TBD 2022, 14:00h<br />'''PLACE:'''&nbsp;  Kristen Nygaards Hall (Room 5370), 5th floor, IFI, UiO, Ole Johan Dahls hus, Gaustadalleen 23b, Oslo. [https://kart.finn.no/?lng=10.71782&lat=59.94342&zoom=17&mapType=normap&markers=10.71782,59.94342,r,Gaustadall%C3%A9en+23B See map].<br />
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| '''TIME:'''&nbsp; Friday 4 November 2022, 14:00h<br />'''PLACE:'''&nbsp;  Kristen Nygaards Hall (Room 5370), 5th floor, IFI, UiO, Ole Johan Dahls hus, Gaustadalleen 23b, Oslo. [https://kart.finn.no/?lng=10.71782&lat=59.94342&zoom=17&mapType=normap&markers=10.71782,59.94342,r,Gaustadall%C3%A9en+23B See map].<br />
 
Coffee and snaks served.<br />
 
Coffee and snaks served.<br />
 
<br />'''AGENDA:'''<br />
 
<br />'''AGENDA:'''<br />
 
14:00h Welcome at IFI and AF''Security''<br />14:15 Invited talk<br />
 
14:00h Welcome at IFI and AF''Security''<br />14:15 Invited talk<br />
* TITLE: ''TBD'' &nbsp;
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* TITLE: ''Transport-level privacy for instant messaging'' &nbsp;
* SPEAKER: NN
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* SPEAKER: Boel Nelson, University of Copenhagen
| <center>photo</center>
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| <center>[[File:photo-Boel-Nelson.jpg|150px|link=https://di.ku.dk/english/staff/vip/researchers_ac/?pure=en/persons/760913]]</center>
| <center>company</center>
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| <center>&nbsp;&nbsp;[[File:logo-University-Copenhagen.png|border|300px|link=https://www.ku.dk/english/]]</center>
 
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* ABSTRACT:<br />TBD.<br />
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* ABSTRACT:<br />Traffic analysis poses an important privacy challenge. In particular, transport-level data can leak unintentional information—such as who communicates with whom. Existing tools for metadata privacy have adoption obstacles, including the risks of being scrutinized for having a particular app installed, and performance overheads incompatible with mobile devices.<br /><br /> In this talk, I will present DenIM (Deniable Instant Messaging), a novel protocol built on the idea of hiding traffic to make it unobservable to an adversary by piggybacking it on observable traffic. We posit that resilience to traffic analysis must be directly supported by major IM services themselves, and must be done in a low-latency manner without breaking existing features. Hence, DenIM is designed both for compatibility and performance; DenIM is a variant of the Signal protocol—commonly used for strong encryption in instant messaging services, and, DenIM’s bandwidth overhead scales with the volume of regular traffic, as opposed to scaling with time or the number of users.<br /><br /> The talk is based on joint research with E. Pagnin and A. Askarov.
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<br />
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'''BIO:''' &nbsp;
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<br />Boel Nelson is a postdoc in the Algorithms and Complexity section at University of Copenhagen, and a member of the research center Basic Algorithms Research Copenhagen (BARC). She is an upcoming Marie Skłodowska-Curie postdoctoral fellow—starting her project on Provable Privacy for Metadata (ProPriM) in August 2023 at Aarhus University. Her research interests include data privacy, detection and mitigation of side-channels, and privacy enhancing technologies.
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Prior to joining UCPH/BARC, Boel worked as a postdoc in the Logic and Semantics group at Aarhus University, where she conducted research on anonymous communication. Boel earned her PhD from Chalmers University of Technology, Sweden, with a dissertation titled ''Differential Privacy—A Balancing Act''. Additionally, Boel holds a MSc in Computer Systems and Networks with a security specialization, and a BSc in Software Engineering.
  
'''BIO:''' &nbsp; TBD. 
 
<br /><br />
 
  
 
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Revision as of 10:04, 26 October 2022

Transport-level privacy for instant messaging

TIME:  Friday 4 November 2022, 14:00h
PLACE:  Kristen Nygaards Hall (Room 5370), 5th floor, IFI, UiO, Ole Johan Dahls hus, Gaustadalleen 23b, Oslo. See map.

Coffee and snaks served.

AGENDA:
14:00h Welcome at IFI and AFSecurity
14:15 Invited talk

  • TITLE: Transport-level privacy for instant messaging  
  • SPEAKER: Boel Nelson, University of Copenhagen
Photo-Boel-Nelson.jpg
  Logo-University-Copenhagen.png
  • ABSTRACT:
    Traffic analysis poses an important privacy challenge. In particular, transport-level data can leak unintentional information—such as who communicates with whom. Existing tools for metadata privacy have adoption obstacles, including the risks of being scrutinized for having a particular app installed, and performance overheads incompatible with mobile devices.

    In this talk, I will present DenIM (Deniable Instant Messaging), a novel protocol built on the idea of hiding traffic to make it unobservable to an adversary by piggybacking it on observable traffic. We posit that resilience to traffic analysis must be directly supported by major IM services themselves, and must be done in a low-latency manner without breaking existing features. Hence, DenIM is designed both for compatibility and performance; DenIM is a variant of the Signal protocol—commonly used for strong encryption in instant messaging services, and, DenIM’s bandwidth overhead scales with the volume of regular traffic, as opposed to scaling with time or the number of users.

    The talk is based on joint research with E. Pagnin and A. Askarov.


BIO:  
Boel Nelson is a postdoc in the Algorithms and Complexity section at University of Copenhagen, and a member of the research center Basic Algorithms Research Copenhagen (BARC). She is an upcoming Marie Skłodowska-Curie postdoctoral fellow—starting her project on Provable Privacy for Metadata (ProPriM) in August 2023 at Aarhus University. Her research interests include data privacy, detection and mitigation of side-channels, and privacy enhancing technologies.

Prior to joining UCPH/BARC, Boel worked as a postdoc in the Logic and Semantics group at Aarhus University, where she conducted research on anonymous communication. Boel earned her PhD from Chalmers University of Technology, Sweden, with a dissertation titled Differential Privacy—A Balancing Act. Additionally, Boel holds a MSc in Computer Systems and Networks with a security specialization, and a BSc in Software Engineering.


AFSecurity-small.png AFSecurity is organised by UiO Digital Security. Logo-uio-english-2022.png Sec-light-360.png