Schneier.com is Moving

Im switching my website software from Movable Type to WordPress, and moving to a new host. The migration is expected to last from approximately 3 AM EST Monday until 4 PM EST Tuesday. The site will still be visible during that time, but comments will be disabled. This is to prevent any new commen...

2017 Tesla Hack

Interesting story of a class break against the entire Tesla fleet...

Using Disinformation to Cause a Blackout

Interesting paper: "How weaponizing disinformation can bring down a city's power grid": Abstract: Social media has made it possible to manipulate the masses via disinformation and fake news at an unprecedented scale. This is particularly alarming from a security perspective, as humans have proven...

Details on the Mirai Botnet Authors

Brian Krebs has a long article on the Mirai botnet authors, who pled guilty...

How American Political Campaigns Are Using AI—and What They’re Spending on the Tools

This essay was written with Nathan E. Sanders, and originally appeared inThe Guardian. New campaign finance disclosure data shines a light on which US political campaigns are using AI tools and how much they are spending on them. Candidates', parties' and committees' spending reveals that AI is...

Using Device Linking to Eavesdrop on WhatsApp and Signal

Modern messaging apps allow users to link their phone accounts to their computer desktop. Eavesdroppers are taking advantage of this capability: Apps such as WhatsApp Web and Signal Desktop allow people to use their accounts on other devices, such as laptops or desktop computers. Germany's Custom...

Using a VM to Contain an AI Agent

It won't work: My suspicion was that GPT 5.6-Cyber would succeed, but the frequency and manner of its success removed all doubt. We have to reassess sandboxing quality for capable AI agents, and in general the software stack with which they interact. An off-the-shelf VM is not enough to contain a...

Spyware for Babies

The New York Times has a long article alt link on surveillance systems aimed at babies. They are increasingly using AI. Nanit and its rivals want to own 24/7 health tracking for the sub-four-foot set. And their already astonishing levels of baby data collection are just the beginning. Nanit...

AI for Military Support

Interesting empirical research: "Black Box Warfare: Human Judgment and Military Decision-Making in the Age of AI." Abstract: How is AI transforming decision-making in modern conflict? This study provides a unique empirical window into that question by deploying a high-fidelity replica of an AI...

Should You Use AI for a Task? Here’s a Simple Way to Decide

This essay originally appeared inThe Guardian. I teach public policy at the Harvard Kennedy School and the Munk School at the University of Toronto. And it will come as no surprise to you that my students regularly use AI to complete their writing assignments. Doing so is a waste of their tuition...

Measuring LLMs’ Ability to Perform Cryptanalysis

There's new benchmark measuring AI's ability to perform mathematical cryptanalysis. Anthropic's frontier model actually found new attacks. The benchmark: "CryptanalysisBench: Can LLMs do Cryptanalysis?" The idea is to benchmark the ability of LLMs to discover new mathematical cryptanalytic attack...

End-to-End Encryption and “Going Dark”

New paper: "Encryption and Globalization 15 Years Later: End-to-End Encryption and the Third Round of the 'Going Dark' Debate": Abstract : This Article updates and expands on 2012 research on encryption and globalization, analyzing what the authors call "Round 3" of the Going Dark Debate: the...

A Video Screen That Is Also a Camera

Amazing: Researchers from ETH Zurich in Switzerland, however, managed to create a new type of pixel that can simultaneously do both. This hypercharged pixel, called a Fourier pixel, can generate and sense arbitrary light fields and tap into a pixel's full potential for carrying information by...

Upcoming Speaking Engagements

This is a current list of where and when I am scheduled to speak: I’m speaking virtually at the Policy-Relevant Privacy Research Workshop in Calgary, Canada, on Monday, July 20, 2026. I’m speaking at Boston Leadership Exchange in Boston, Massachusetts, USA, on Wednesday, July 22, 2026. I’m speaki...

Critical Zcash Vulnerability Found and Fixed

If you're a user--owner?--of this cryptocurrency, this is important: On May 29, the security researcher Taylor Hornby found a critical vulnerability in Zcash Orchard privacy pool using Claude Opus 4.8. The Zcash team hired Hornby specifically to look for this kind of issue. He found one fast enou...

Sen. Sanders Talks to Claude About AI and Privacy

Claude is actually pretty good on the issues...

Friday Squid Blogging: Jumbo Flying Squid in the South Pacific

The population needs better conservation. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered. Blog moderation policy...

New Attack Against Wi-Fi

It's called AirSnitch: Unlike previous Wi-Fi attacks, AirSnitch exploits core features in Layers 1 and 2 and the failure to bind and synchronize a client across these and higher layers, other nodes, and other network names such as SSIDs Service Set Identifiers. This cross-layer identity...

Malicious AI

Interesting: Summary: An AI agent of unknown ownership autonomously wrote and published a personalized hit piece about me after I rejected its code, attempting to damage my reputation and shame me into accepting its changes into a mainstream python library. This represents a first-of-its-kind cas...

Friday Squid Blogging: Squid Fishing Tips

This is a video of advice for squid fishing in Puget Sound. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered. Blog moderation policy...

Could ChatGPT Convince You to Buy Something?

Eighteen months ago, it was plausible that artificial intelligence might take a different path than social media. Back then, AI's development hadn't consolidated under a small number of big tech firms. Nor had it capitalized on consumer attention, surveilling users and delivering ads...

Friday Squid Blogging: The Chinese Squid-Fishing Fleet off the Argentine Coast

The latest article on this topic. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered. Blog moderation policy...

Are We Ready to Be Governed by Artificial Intelligence?

Artificial Intelligence AI overlords are a common trope in science-fiction dystopias, but the reality looks much more prosaic. The technologies of artificial intelligence are already pervading many aspects of democratic government, affecting our lives in ways both large and small. This has occurr...

Urban VPN Proxy Surreptitiously Intercepts AI Chats

This is pretty scary: Urban VPN Proxy targets conversations across ten AI platforms: ChatGPT, Claude, Gemini, Microsoft Copilot, Perplexity, DeepSeek, Grok xAI, Meta AI. For each platform, the extension includes a dedicated "executor" script designed to intercept and capture conversations. The...

AIs Exploiting Smart Contracts

I have long maintained that smart contracts are a dumb idea: that a human process is actually a security feature. Here's some interesting research on training AIs to automatically exploit smart contracts: AI models are increasingly good at cyber tasks, as we've written about before. But what is t...

FBI Warns of Fake Video Scams

The FBI is warning of AI-assisted fake kidnapping scams: Criminal actors typically will contact their victims through text message claiming they have kidnapped their loved one and demand a ransom be paid for their release. Oftentimes, the criminal actor will express significant claims of violence...

Scam USPS and E-Z Pass Texts and Websites

Google has filed a complaint in court that details the scam: In a complaint filed Wednesday, the tech giant accused "a cybercriminal group in China" of selling "phishing for dummies" kits. The kits help unsavvy fraudsters easily “execute a large-scale phishing campaign,” tricking hordes of...

AI Summarization Optimization

These days, the most important meeting attendee isn’t a person: It’s the AI notetaker. This system assigns action items and determines the importance of what is said. If it becomes necessary to revisit the facts of the meeting, its summary is treated as impartial evidence. But clever meeting...

Will AI Strengthen or Undermine Democracy?

Listen to the Audio on NextBigIdeaClub.com Below, co-authors Bruce Schneier and Nathan E. Sanders share five key insights from their new book, Rewiring Democracy: How AI Will Transform Our Politics, Government, and Citizenship. What's the big idea? AI can be used both for and against the public...

Malicious-Looking URL Creation Service

This site turns your URL into something sketchy-looking. For example, www.schneier.com becomes...

Hacking Electronic Safes

Vulnerabilities in electronic safes that use Securam Prologic locks: While both their techniques represent glaring security vulnerabilities, Omo says it's the one that exploits a feature intended as a legitimate unlock method for locksmiths that's the more widespread and dangerous. "This attack i...

Lawsuit About WhatsApp Security

Attaullah Baig, WhatsApp's former head of security, has filed a whistleblower lawsuit alleging that Facebook deliberately failed to fix a bunch of security flaws, in violation of its 2019 settlement agreement with the Federal Trade Commission. The lawsuit, alleging violations of the whistleblower...

Signed Copies of Rewiring Democracy

When I announced my latest book last week, I forgot to mention that you can pre-order a signed copy here. I will ship the books the week of 10/20, when it is published...

Friday Squid Blogging: Catching Humboldt Squid

First-person account of someone accidentally catching several Humboldt squid on a fishing line. No photos, though. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered. Blog moderation policy...

Friday Squid Blogging: Bobtail Squid

Nice short article on the bobtail squid. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered. Blog moderation policy...

AI Applications in Cybersecurity

There is a really great series of online events highlighting cool uses of AI in cybersecurity, titled Prompt||GTFO. Videos from the first three events are online. And here's where to register to attend, or participate, in the fourth. Some really great stuff here...

The “Incriminating Video” Scam

A few years ago, scammers invented a new phishing email. They would claim to have hacked your computer, turned your webcam on, and videoed you watching porn or having sex. BuzzFeed has an article talking about a "shockingly realistic" variant, which includes photos of you and your house--more...

Automatic License Plate Readers Are Coming to Schools

Fears around children is opening up a new market for automatic license place readers...

Ghostwriting Scam

The variations seem to be endless. Here's a fake ghostwriting scam that seems to be making boatloads of money. This is a big story about scams being run from Texas and Pakistan estimated to run into tens if not hundreds of millions of dollars, viciously defrauding Americans with false hopes of...

New Linux Vulnerabilities

They're interesting: Tracked as CVE-2025-5054 and CVE-2025-4598, both vulnerabilities are race condition bugs that could enable a local attacker to obtain access to access sensitive information. Tools like Apport and systemd-coredump are designed to handle crash reporting and core dumps in Linux...

Signal Blocks Windows Recall

This article gives a good rundown of the security risks of Windows Recall, and the repurposed copyright protection took that Signal used to block the AI feature from scraping Signal data...

Friday Squid Blogging: Squid Facts on Your Phone

Text "SQUID" to 1-833-SCI-TEXT for daily squid facts. The website has merch. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered...

Friday Squid Blogging: Live Colossal Squid Filmed

A live colossal squid was filmed for the first time in the ocean. It's only a juvenile: a foot long. As usual, you can also use this squid post to talk about the security stories in the news that I haven't covered...

China Sort of Admits to Being Behind Volt Typhoon

The Wall Street Journal has the story: Chinese officials acknowledged in a secret December meeting that Beijing was behind a widespread series of alarming cyberattacks on U.S. infrastructure, according to people familiar with the matter, underscoring how hostilities between the two superpowers ar...

DIRNSA Fired

In "Secrets and Lies" 2000, I wrote: It is poor civic hygiene to install technologies that could someday facilitate a police state. It's something a bunch of us were saying at the time, in reference to the vast NSA's surveillance capabilities. I have been thinking of that quote a lot as I read ne...

Report on Paragon Spyware

Citizen Lab has a new report on Paragon's spyware: Key Findings: Introducing Paragon Solutions. Paragon Solutions was founded in Israel in 2019 and sells spyware called Graphite. The company differentiates itself by claiming it has safeguards to prevent the kinds of spyware abuses that NSO Group...

My Writings Are in the LibGen AI Training Corpus

The Atlantic has a search tool that allows you to search for specific works in the "LibGen" database of copyrighted works that Meta used to train its AI models. The rest of the article is behind a paywall, but not the search tool. It’s impossible to know exactly which parts of LibGen Meta used to...

Friday Squid Blogging: Eating Bioluminescent Squid

Firefly squid is now a delicacy in New York. Blog moderation policy...

North Korean Hackers Steal $1.5B in Cryptocurrency

It looks like a very sophisticated attack against the Dubai-based exchange Bybit: Bybit officials disclosed the theft of more than 400,000 ethereum and staked ethereum coins just hours after it occurred. The notification said the digital loot had been stored in a "Multisig Cold Wallet" when,...

Pairwise Authentication of Humans

Here's an easy system for two humans to remotely authenticate to each other, so they can be sure that neither are digital impersonations. To mitigate that risk, I have developed this simple solution where you can setup a unique time-based one-time passcode TOTP between any pair of persons. This i...