Author Archives: Masoud

Conducting an On-line Survey

Thanks to all of our participants, the Cognitive-Walkthrough (CW) and Think-Aloud (TA) sessions are done. Overall we had 10 CW and 17 TA participants. The results were very interesting and were presented as a poster at SOUPS 2019 (take a look at the poster extended abstract here).

As the next step of our study,  we plan to conduct an online survey on Amazon Mechanical Turk (MTurk) to validate and refine our findings about users’ perception of, experience with, and attitudes towards SL. Online survey was selected as the data collection method because it would enable us to obtain a representative sample of smartphone user population. For the CW and TA studies, our participant sample was not representative (as with most qualitative studies) which limited the generalizability of the study findings. We believe that the survey findings can offer insights into (1) the factors that influence Android users’ decisions about using SL, (2) their perception of SL usability, security, and privacy, and (3) particular scenarios in which they perceive significant value in employing SL. These findings can contribute to the understanding of the role and place of implicit authentication (IA) for smartphones.

Seeking Participants for Think-Aloud Sessions

Do you want to play with a smartphone while helping UBC researchers investigate technology improvements?
We are seeking participants for a study of the Smart Lock feature on Android smartphones. Each participant will carry out a set of tasks with Android Smart Lock in a one-on-one session with a researcher. You don’t need to have previous experience with Smart Lock to participate in the study.
The session can be held either in UBC Point Grey campus or UBC Robson square as per participant’s choice. Participants must be at least 19 years old and reside in Greater Vancouver area.
Each participant will be compensated with $30 in appreciation of his/her time.
If you are interested, please take the eligibility survey using the link below:
You can also scan the QR code below to access the survey:
This research is conducted by the University of British Columbia (UBC)

Project Description

This project investigates methods for improving user experience, when it comes to secure physical access to smartphones. In particular, it aims:

  • (Phase 1) to identify security and usability requirements for continuous authentication on mobile devices, by studying users’ experiences with Google Smart Lock for Android (SL) as well as
  • (Phase 2) to design and evaluate UX for a typical continuous authentication solution (referred as “CAuth”). Both, the study of requirements and the evaluation of CAuth UX are done empirically, by employing user studies. The design and evaluation of CAuth UX will be informed by the understanding of users’ experiences with SL.

The Principal Investigator (PI) of this project is Prof. Konstantin Beznosov from the department of Electrical and Computer Engineering at UBC. You can reach him by e-mail at beznosov [at]

The co-investigators of this project are:

  • Masoud Mehrabi Koushki, PhD Student, Department of Electrical and Computer Engineering.
    mehrabi [at]
  • Borke Obada-Obieh, PhD Student, Department of Electrical and Computer Engineering.
    borke [at]