Meriem Guerar

About me

I’m currently a researcher at the University of Genova, feel free to contact me if you are interested in one of my fields of interest.


  • Blockchain Technology
  • Usable security
  • Authentication
  • Cyber-security


  • DIBRIS, University of Genova

    April 2018 – Present | Postdoctoral research fellow at the University of Genova, Italy.

  • DEI, University of Padova

    March 2017 – March 2018 | Postdoctoral research fellow at the University of Padova, Italy.

  • DEI, University of Padova

    September 2014 – March 2015 | Research intern, Erasmus Scholarship, University of Padova, Italy


  • Ph.D. in Computer Science, 2017

    Oran University (USTO), Oran, Algeria

  • MSc in Computer Networks and Security, 2011

    Oran University (USTO), Oran, Algeria

  • Bachelor in Computer Science, 2009

    Oran University (USTO), Oran, Algeria



A secure PIN-based authentication mechanism for Smartwatches


A new secure version of Android Pattern lock resilient to smudge and side channel attacks...


CAPPCHA is a promising alternative to CAPTCHA, which is based on physical nature of human instead of cognitive task. CAPPCHA challenge consist of tilting the smartphone to a specific degree displayed on the screen. The rationale behind CAPPCHA is to use something that the user can do easily while the malware cannot.

Color Wheel PIN

Color Wheel Pin: Usable and resilient ATM authentication.


Using Screen brightness to improve authentication security.


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