I am a senior principal researcher in the Office of the CTO, Azure for Operators at Microsoft. My research focuses on building trusted and secure systems, but I am interested in all aspects of systems research.

I am very proud when my research has impact in practice. Over the years, together with my colleagues, I have been fortunate to:

  • influence the DRAM industry to start addressing the threat of Rowhamer attacks.
  • ship a cloud service used by 20+ million users.
  • build the reference implementation of the firmware TPM.
  • build one of the first face recognition-based payment systems, six years before Amazon Go was launched.

Prior to coming to Microsoft, I was a faculty member of the Computer Science Department at the University of Toronto. I received my Ph.D. from the Computer Science & Engineering department at the University of Washington. I am an ACM Distinguished Member.

The good folks at Microsoft Research recorded a podcast with me on Rowhamer and wrote a blog post on my work and background.


  • 2021-06:
    I hope Panopticon will influence the DRAM industry to fix their Rowhammer problem. No more excuses!
    Read our paper on Panopticon. We also open-sourced a simple simulator targeting DDR5 DRAM (GitHub link).
  • 2021-05:
    After coming up with an awesome title for our HotOS paper, Kevin outdid himself and turned his presentation into poetry!
    (YouTube link)
  • 2021-03:
    JEDEC published two whitepapers on Rowhamer [1,2]. This is a first for JEDEC. Good for them!
  • 2021-03:
    Our work on a secure platform for voice assistants' extensions has been accepted to MobiSys 2021.
    Alexa! send kudos to my colleagues at UC Irvine, MJ and Ardalan.

Recent Publications

Panopticon: A Complete In-DRAM Rowhammer Mitigation
Tanj Bennett, Stefan Saroiu, Alec Wolman, Lucian Cojocar

DRAMSec 2021

Stop! Hammer Time: Rethinking Our Approach to Rowhammer Mitigations
Kevin Loughlin, Stefan Saroiu, Alec Wolman, Baris Kasikci

HotOS 2021

Are We Susceptible to Rowhammer? An End-to-End Methodology for Cloud Providers
Lucian Cojocar, Jeremie Kim, Minesh Patel, Lillian Tsai, Stefan Saroiu, Alec Wolman, Onur Mutlu

IEEE S&P 2020

Recent Service