J. Alex Halderman

@jhalderm

Bredt Family Professor of Computer Science and Engineering, @UMich: Security and privacy, election security, and Internet freedom. Co-founded @LetsEncrypt

Ann Arbor, MI

jhalderm.com

Joined December 2009

Pinned
J. Alex Halderman
@jhalderm
Jun 14, 2023
Today, the Federal District Court for the Northern District of Georgia unsealed a 96-page report that I wrote w/ Prof. @_aaspring_ from @AuburnU. It describes serious vulnerabilities we found in Georgia's Dominion ImageCast X ballot marking devices. storage.courtlistener.com/recap/gov.usco…
J. Alex Halderman
@jhalderm
Feb 26
How can users enjoy the benefits of frontier AI without falling into a privacy dystopia? Ken and my PhD student Erik Chi are charting a path to a solution, based on ideas of unlikable inference and private personal intelligence. Try what they've built at openanonymity.ai.
Ken Liu
@kenziyuliu
Feb 26
Can we build a blind, *unlinkable inference* layer where ChatGPT/Claude/Gemini can't tell which call came from which users, like a “VPN for AI inference”? Yes! Blog post below + we built it into open source infra/chat app and served >15k prompts at Stanford so far. How it helps
J. Alex Halderman
@jhalderm
Mar 25, 2025
A new executive order just dropped that, if implemented, promises to significantly strengthen federal certification of voting machines.
J. Alex Halderman
@jhalderm
Nov 7, 2024
From a security perspective, elections are much safer when there's a decisive outcome than when they hinge on razor-thin margins in a few states. But what about next time? How many voters will continue to call for necessary election security improvements?
J. Alex Halderman
@jhalderm
Aug 28, 2023
Today's the 1st day of class at @UMich and we're in hour 24 of a major IT outage. Despite the disruption, it's been great to see colleagues innovate and help each other work around the downtime. Big thanks to everyone at @umichTECH who's been up all night to bring us back online.