| 1. |
- Bosk, Daniel, et al.
(författare)
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Applying privacy-enhancing technologies : One alternative future of protests
- 2018
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Ingår i: Protests in the Information Age. - : Taylor & Francis. - 9781351815437 - 9780415791403 ; , s. 73-94
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Bokkapitel (refereegranskat)abstract
- While current technologies, such as online social networks, can facilitate coordination and communication for protest organization, they can also endanger political activists when the control over their data is ceded to third parties. For technology to be useful for activism, it needs to be trustworthy and protect the users’ privacy; only then can it be viewed as a potential improvement over more traditional, offline methods. Here, we discuss a selection of such privacy-enhancing technologies from a Computer Science perspective in an effort to open a dialogue and elicit input from other perspectives.
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| 2. |
- Bosk, Daniel, et al.
(författare)
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Distance-bounding, privacy-preserving attribute-based credentials
- 2020
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Ingår i: International Conference on Cryptology and Network SecurityCANS 2020: Cryptology and Network Security. - Cham : Springer Science and Business Media Deutschland GmbH. - 9783030654108 ; , s. 147-166
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Konferensbidrag (refereegranskat)abstract
- Distance-bounding anonymous credentials could be used for any location proofs that do not need to identify the prover and thus could make even notoriously invasive mechanisms such as location-based services privacy-preserving. There is, however, no secure distance-bounding protocol for general attribute-based anonymous credentials. Brands and Chaum’s (EUROCRYPT’93) protocol combining distance-bounding and Schnorr identification comes close, but does not fulfill the requirements of modern distance-bounding protocols. For that, we need a secure distance-bounding zero-knowledge proof-of-knowledge resisting mafia fraud, distance fraud, distance hijacking and terrorist fraud. Our approach is another attempt toward combining distance bounding and Schnorr to construct a distance-bounding zero-knowledge proof-of-knowledge. We construct such a protocol and prove it secure in the (extended) DFKO model for distance bounding. We also performed a symbolic verification of security properties needed for resisting these attacks, implemented in Tamarin. Encouraged by results from Singh et al. (NDSS’19), we take advantage of lessened constraints on how much can be sent in the fast phase of the distance-bounding protocol and achieve a more efficient protocol. We also provide a version that does not rely on being able to send more than one bit at a time which yields the same properties except for (full) terrorist fraud resistance.
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| 3. |
- Bosk, Daniel, et al.
(författare)
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Privacy-preserving access control in publicly readable storage systems
- 2016
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Ingår i: 10th IFIP WG 9.2, 9.5, 9.6/11.7, 11.4, 11.6/SIG 9.2.2 International Summer School on Privacy and Identity Management, 2015. - Cham : Springer-Verlag New York. - 9783319417622 ; , s. 327-342
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Konferensbidrag (refereegranskat)abstract
- In this paper, we focus on achieving privacy-preserving access control mechanisms for decentralized storage, primarily intended for an asynchronous message passing setting. We propose two modular constructions, one using a pull strategy and the other a push strategy for sharing data. These models yield different privacy properties and requirements on the underlying system. We achieve hidden policies, hidden credentials and hidden decisions. We additionally achieve what could be called ‘hidden policy-updates’, meaning that previously-authorized subjects cannot determine if they have been excluded from future updates or not.
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| 4. |
- Bosk, Daniel, et al.
(författare)
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Towards Perfectly Secure and Deniable Communication Using an NFC-Based Key-Exchange Scheme
- 2015
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Ingår i: Secure IT Systems. - Cham : Springer. ; , s. 72-87, s. 72-87
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Konferensbidrag (refereegranskat)abstract
- In this paper we first analyse the possibility for deniability under a strong adversary, who has an Internet-wide transcript of the communication. Secondly, we present a scheme which provides the desirable properties of previous messaging schemes, but with stronger deniability under the new adversary model. Our scheme requires physical meetings for exchanges of large amounts of random key-material via near-field communication and later uses this random data to key a one-time pad for text-messaging. We prove the correctness of the protocol and, finally, we evaluate the practical feasibility of the suggested scheme.
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| 5. |
- Bosk, Daniel, et al.
(författare)
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When Flying Blind, Bring a Co-pilot : Informal Peer Observation and Cooperative Teaching during Remote Teaching
- 2021
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Ingår i: Annual Conference on Innovation and Technology in Computer Science Education, ITiCSE. - New York, NY, USA : Association for Computing Machinery (ACM). ; , s. 611-612
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Konferensbidrag (refereegranskat)abstract
- The shift to meeting students online has made traditional forms of interaction difficult or impossible to replicate. In response, we suggest that teachers become co-pilots for each other: joining lectures and extending the abilities of a solo teacher. By doing so, there are clear and distinct benefits for students, the teacher, and the co-pilot, with almost no barrier to entry and very little preparation required. Whilst there is a time cost, we feel this is well spent and acts as a gateway to more established pedagogical practices, such as peer observation and cooperative teaching.
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| 6. |
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| 7. |
- Snider, Johan, et al.
(författare)
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Learning in the Pandemic : How the possibility to play video games during class and attend lessons without getting out of bed affects time-on-task
- 2022
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Ingår i: IEEE Frontiers in Education Conference (FIE). - : Institute of Electrical and Electronics Engineers (IEEE).
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Konferensbidrag (refereegranskat)abstract
- This Innovate Practice work-in-progress paperpresents findings around how distance learning, due to the theCOVID-19 pandemic, affected students as measured by time-ontask in programming.In this qualitative study, we examine a group of 36 second yearupper-secondary students in Programming 1 during a nine weekperiod in Spring 2021. During this time, they alternated betweenone whole week of distance learning followed by two weeks of inschool instruction. For the Programming 1 lessons, students usedan online platform to write, edit and run code in. We analyzedthe log data from the platform to estimate time-on-task for eachstudent for every lesson both at home and at school.We observed that students were affected differently by distancelearning as measured by time-on-task. 12 students had moreaverage time-on-task at school. 15 students had more averagetime-on-task at home. Nine students had less than five minutesdifference on average.In addition to the analysis of time-on-task, students weregiven a survey in Fall 2021 to follow up on their experienceswith in-school teaching and distance learning. In the survey,students were asked questions about their study environment athome during distance learning. From the responses, 13 studentsdescribed their study environment as “in bed” despite having access to a table and chair in a room for themselves and twentythree students described their study environment as “playingvideo games during online lectures”. Not surprisingly, studentsthat said they were playing video games during online lectureshad a lower average time-on-task by about ten minutes than theirpeers. Interestingly, students that said they participated in classin bed had a higher average time-on-task by about ten minutesthan their peers.Correlating responses from the survey and time-on-task data,we reason about how students’ study environments at homeaffected their time-on-task and how distance learning has affectedstudents in the pandemic.
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