liu.seSearch for publications in DiVA
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Longitudinal Analysis of the Third-party Authentication Landscape
Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, Faculty of Science & Engineering. (ADIT)
Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, Faculty of Science & Engineering. (ADIT)
Linköping University, Department of Computer and Information Science, Database and information techniques. Linköping University, Faculty of Science & Engineering. (ADIT)
2016 (English)Conference paper, Published paper (Refereed)
Abstract [en]

Many modern websites offer single sign-on (SSO) services, which allow the user to use an existing account with a third-party website such as Facebook to authenticate. When using SSO the user must approve an app-rights agreement that specifies what data related to the user can be shared between the two websites and any actions (e.g., posting comments) that the origin website is allowed to perform on behalf of the user on the third-party provider (e.g., Facebook). Both cross-site data sharing and actions performed on behalf of the user can have significant privacy implications. In this paper we present a longitudinal study of the third-party authentication landscape, its structure, and the protocol usage, data sharing, and actions associated with individual third-party relationships. The study captures the current state, changes in the structure, protocol usage, and information leakage risks.

Place, publisher, year, edition, pages
Internet Society , 2016.
National Category
Computer Systems
Identifiers
URN: urn:nbn:se:liu:diva-127301DOI: 10.14722/ueop.2016.23008ISBN: 1-891562-44-4 (print)OAI: oai:DiVA.org:liu-127301DiVA: diva2:921166
Conference
NDSS Workshop on Understanding and Enhancing Online Privacy Workshop (UEOP@NDSS).21-24 February 2016 Catamaran Resort Hotel & Spa in San Diego, California
Available from: 2016-04-19 Created: 2016-04-19 Last updated: 2017-03-16Bibliographically approved
In thesis
1. Web Authentication using Third-Parties in Untrusted Environments
Open this publication in new window or tab >>Web Authentication using Third-Parties in Untrusted Environments
2016 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

With the increasing personalization of the Web, many websites allow users to create their own personal accounts. This has resulted in Web users often having many accounts on different websites, to which they need to authenticate in order to gain access. Unfortunately, there are several security problems connected to the use and re-use of passwords, the most prevalent authentication method currently in use, including eavesdropping and replay attacks.

Several alternative methods have been proposed to address these shortcomings, including the use of hardware authentication devices. However, these more secure authentication methods are often not adapted for mobile Web users who use different devices in different places and in untrusted environments, such as public Wi-Fi networks, to access their accounts.

We have designed a method for comparing, evaluating and designing authentication solutions suitable for mobile users and untrusted environments. Our method leverages the fact that mobile users often bring their own cell phones, and also takes into account different levels of security adapted for different services on the Web.

Another important trend in the authentication landscape is that an increasing number of websites use third-party authentication. This is a solution where users have an account on a single system, the identity provider, and this one account can then be used with multiple other websites. In addition to requiring fewer passwords, these services can also in some cases implement authentication with higher security than passwords can provide.

How websites select their third-party identity providers has privacy and security implications for end users. To better understand the security and privacy risks with these services, we present a data collection methodology that we have used to identify and capture third-party authentication usage on the Web. We have also characterized the third-party authentication landscape based on our collected data, outlining which types of third-parties are used by which types of sites, and how usage differs across the world. Using a combination of large-scale crawling, longitudinal manual testing, and in-depth login tests, our characterization and analysis has also allowed us to discover interesting structural properties of the landscape, differences in the cross-site relationships, and how the use of third-party authentication is changing over time.

Finally, we have also outlined what information is shared between websites in third-party authentication, dened risk classes based on shared data, and proled privacy leakage risks associated with websites and their identity providers sharing data with each other. Our ndings show how websites can strengthen the privacy of their users based on how these websites select and combine their third-parties and the data they allow to be shared.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2016. 64 p.
Series
Linköping Studies in Science and Technology. Dissertations, ISSN 0345-7524 ; 1768
National Category
Computer Systems
Identifiers
urn:nbn:se:liu:diva-127304 (URN)10.3384/diss.diva-127304 (DOI)9789176857533 (ISBN)
Public defence
2016-09-30, Visionen, hus B,, Campus Valla, Linköping, 10:15 (English)
Opponent
Supervisors
Funder
eLLIIT - The Linköping‐Lund Initiative on IT and Mobile Communications
Available from: 2016-08-22 Created: 2016-04-19 Last updated: 2016-08-22Bibliographically approved

Open Access in DiVA

fulltext(835 kB)22 downloads
File information
File name FULLTEXT02.pdfFile size 835 kBChecksum SHA-512
c2433f58c00599120212126ad8001d0947e96fbcf4881739ae818763bb77c8609c2b4a665e8778ee617d1e6d80e18d1dd91845515364a7390035a5c5e50d5a4a
Type fulltextMimetype application/pdf

Other links

Publisher's full text

Authority records BETA

Vapen, AnnaCarlsson, NiklasShahmehri, Nahid

Search in DiVA

By author/editor
Vapen, AnnaCarlsson, NiklasShahmehri, Nahid
By organisation
Database and information techniquesFaculty of Science & Engineering
Computer Systems

Search outside of DiVA

GoogleGoogle Scholar
Total: 63 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
isbn
urn-nbn

Altmetric score

doi
isbn
urn-nbn
Total: 410 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • oxford
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf