Jonathan Mayer is an Assistant Professor of Computer Science and Public Affairs at Princeton University. Before joining the Princeton faculty, Jonathan served as the technology law and policy advisor to United States Senator Kamala Harris and as the Chief Technologist of the Federal Communications Commission Enforcement Bureau. Jonathan's research centers on the intersection of technology and law, with emphasis on national security, criminal procedure, consumer privacy, network management, and online speech. Jonathan is both a computer scientist and a lawyer, and he holds a Ph.D. in computer science from Stanford University and a J.D. from Stanford Law School.
Co-authored with Patrick Mutchler. This is a project of the Stanford Security Lab.
Just over a month ago we launched MetaPhone, an Android app for crowdsourcing phone metadata. Our results have already confirmed that phone activity easily reveals private relationships, is deeply interconnected, and can trivially be identified.
We’ve received lots of great feedback on the study from researchers and participants. One request has been especially consistent: show me my metadata!
Starting today, the MetaPhone app will provide personalized results about your phone metadata privacy.
Co-authored with Patrick Mutchler. This is a project of the Stanford Security Lab.
We’re studying the National Security Agency, and we need your help.
Our recent research on Google’s circumvention of the Safari cookie blocking feature has led to some confusion, in part owing to the company’s statement in response (reproduced in its entiretybelow). This post is an attempt to elucidate the central issues. As with the original writeup, I aim for a neutral viewpoint in the interest of establishing a common factual understanding.
Apple’s Safari web browser is configured to block third-party cookies by default. We identified four advertising companies that unexpectedly place trackable cookies in Safari. Google and Vibrant Media intentionally circumvent Safari’s privacy feature. Media Innovation Group and PointRoll serve scripts that appear to be derived from circumvention example code.
By Jonathan Mayer and Edward W. Felten
Special to The Bee
By Edward Felten and Jonathan Mayer
Snooping on the Internet is tricky. The network is diffuse, global, and packed with potential targets. There’s no central system for identifying or locating individuals, so it’s hard to keep track of who is online and what they’re up to. What’s a spy agency to do?
Privacy Substitutes by Jonathan Mayer & Arvind Narayanan
Arguing that a defendant’s conviction for website hacking should be overturned because legitimate, highly valuable security and privacy research commonly employs techniques that are essentially identical to what the defendant did and that such independent research is of great value to academics, government regulators and the public even when – often especially when — conducted without a website owner’s permission.
"As the ad industry girds for the mushrooming debate around privacy, consumer choice and ad blocking, it’s clear that existing opt-out mechanisms aren’t exactly cutting it, especially when it comes to cross-device.
""The court filings scrupulously avoid naming Tor (or mentioning hacking). Instead, they provide a detailed description of an anonymizing ‘Network’ and how a particular website was hidden in that ‘Network," Jonathan Mayer, a Stanford University legal scholar and current computer science doctoral candidate, told Ars. "There's only one software tool with the described popularity and with the described client and server functionality. That's Tor.""
"Online advertising companies, for instance, can collect huge amounts of information about a person's browsing history, which can reveal "a very comprehensive dossier of what you've been up to" on the Internet, according to Jonathan Mayer, a lawyer and computer scientist affiliated with Stanford's Center for Internet and Society -- not all of which might match up with the persona you present in real life.
"“With a cellphone, the I.P. address might get you a city or part of a city,” said Jonathan Mayer, a computer scientist and lawyer at Stanford University. “But, if you are using a landline address, that could in fact be incredibly precise — to an exact address or part of a building, depending on how it is configured.”
"Cybersecurity experts also note that this legislation would do little, if anything, to thwart data breaches. "I'm not aware of a single computer security researcher or practitioner who has…gotten up and said this sort of information sharing will meaningfully reduce the likelihood of attack or the severity of breaches or any of the sorts of things you'd want to address," says Jonathan Mayer, a computer scientist and scholar at the Center for Internet and Society at Stanford University."
Presented by: Catholic University Columbus School of Law’s Journal of Law & Technology
2016 Journal of Law & Technology Symposium
Cybersecurity and Privacy in the Internet Economy: Information Sharing, Data Security, and Intellectual Property
March 17, 2016
2:00 p.m. - 5:30 p.m.
Because of Edward Snowden’s remarkable public service, we know that the National Security Agency, with the cooperation of some large firms, has amassed an unprecedented database of personal information. The ostensible goal in collecting that information is to protect national security. The effect, according to Reed Hundt, is to undermine democracy.
This talk presents an empirical assessment of the NSA’s legal restrictions, including research cited by President Obama’s intelligence review group. We find that present limits on bulk surveillance programs come up far short; authorities to intercept international Internet traffic and domestic telephone metadata place ordinary Americans at risk.
Solutions to many pressing economic and societal challenges lie in better understanding data. New tools for analyzing disparate information sets, called Big Data, have revolutionized our ability to find signals amongst the noise. Big Data techniques hold promise for breakthroughs ranging from better health care, a cleaner environment, safer cities, and more effective marketing. Yet, privacy advocates are concerned that the same advances will upend the power relationships between government, business and individuals, and lead to prosecutorial abuse, racial or other profiling, discrimination, redlining, overcriminalization, and other restricted freedoms.
Have you ever borrowed a smartphone without asking? Modified a URL? Scraped a website? Called an undocumented API? Congratulations: you might have violated federal law! A 1986 statute, the Computer Fraud and Abuse Act (CFAA), provides both civil and criminal remedies for mere "unauthorized" access to a computer.
In this first episode, Mike and I explore how your simplest digital footprints – fragments of Google searches, Facebook likes, and innocuous tweets – can expose deeply intimate facts about you. Like whether your parents are divorced and whether you own a gun. In fact, these vanilla datasets that we all generate every time we use the Internet reveal surprising clues about our personalities and behavior. So how can that information be used, and who is collecting it? We talk to Michal Kosinski of Stanford’s Graduate School of Business, and Jonathan Mayer, a computer scientist and lawyer.
As consumers increasingly adopt encryption tools, government officials have warned of the “Going Dark” problem – the notion that widespread encryption will thwart legitimate government efforts to investigate crime and safeguard national security. To address this problem, law enforcement and intelligence community officials have suggested that companies include “backdoors” in their products to permit lawful government access to encrypted data. This proposal has been met with criticism from technologists and privacy advocates alike.
"WELNA: It could indeed. Hackers, by definition, are trying to break into other people's computer accounts and steal their information, so monitoring their activity means watching them poach on other people's Internet usage and private data. I talked with Jonathan Mayer, a computer security fellow at Stanford who's reviewed these latest Snowden documents. He says because of the way the surveillance law is written, the NSA can actually hang on to that hacked information.
CIS Affiliate Scholar David Levine interviews Jonathan Mayer, Stanford Ph.D. candidate in computer science, author of Terms of Abuse: An Empirical Assessment of the Federal Hacking Law, and How to Fix It.
Listen to the full piece at Marketplace.org.
"Now Neustar might lose the contract to Ericsson, which is based in Sweden. Neustar says this would be bad for national security, said Jonathan Mayer, a fellow at Stanford's Center for International Security and Cooperation.
“It certainly is a legitimate concern that the company that routes calls is in position to know a fair amount about law enforcement and intelligence investigations,” Mayer said."