More Prompt||GTFO
The next three in this series on online events highlighting interesting uses of AI in cybersecurity are online: #4, #5, and #6. Well worth watching.
Continue reading More Prompt||GTFO
Author Archives: Bruce Schneier
Friday Squid Blogging: Pilot Whales Eat a Lot of Squid
Short-finned pilot wales (Globicephala macrorhynchus) eat at lot of squid:
To figure out a short-finned pilot whale’s caloric intake, Gough says, the team had to combine data from a variety of sources, including movement data from short-lasting tags, daily feeding rates from satellite tags, body measurements collected via aerial drones, and sifting through the stomachs of unfortunate whales that ended up stranded on land.
Once the team pulled all this data together, they estimated that a typical whale will eat between 82 and 202 squid a day. To meet their energy needs, a whale will have to consume an average of 140 squid a day. Annually, that’s about 74,000 squid per whale. For all the whales in the area, that amounts to about 88,000 tons of squid eaten every year…
Continue reading Friday Squid Blogging: Pilot Whales Eat a Lot of Squid
Upcoming Speaking Engagements
This is a current list of where and when I am scheduled to speak:
- My coauthor Nathan E. Sanders and I are speaking at the Rayburn House Office Building in Washington, DC at noon ET on November 17, 2025. The event is hosted by the POPVOX Foundation and the topic is “AI and Congress: Practical Steps to Govern and Prepare.”
- I’m speaking on “Integrity and Trustworthy AI” at North Hennepin Community College in Brooklyn Park, Minnesota, USA, on Friday, November 21, 2025, at 2:00 PM CT. The event is cohosted by the college and The Twin Cities IEEE Computer Society…
The Role of Humans in an AI-Powered World
As AI capabilities grow, we must delineate the roles that should remain exclusively human. The line seems to be between fact-based decisions and judgment-based decisions.
For example, in a medical context, if an AI was demonstrably better at reading a test result and diagnosing cancer than a human, you would take the AI in a second. You want the more accurate tool. But justice is harder because justice is inherently a human quality in a way that “Is this tumor cancerous?” is not. That’s a fact-based question. “What’s the right thing to do here?” is a human-based question…
Book Review: The Business of Secrets
The Business of Secrets: Adventures in Selling Encryption Around the World by Fred Kinch (May 24, 2024)
From the vantage point of today, it’s surreal reading about the commercial cryptography business in the 1970s. Nobody knew anything. The manufacturers didn’t know whether the cryptography they sold was any good. The customers didn’t know whether the crypto they bought was any good. Everyone pretended to know, thought they knew, or knew better than to even try to know.
The Business of Secrets is the self-published memoirs of Fred Kinch. He was founder and vice president of—mostly sales—at a US cryptographic hardware company called Datotek, from company’s founding in 1969 until 1982. It’s mostly a disjointed collection of stories about the difficulties of selling to governments worldwide, along with descriptions of the highs and (mostly) lows of foreign airlines, foreign hotels, and foreign travel in general. But it’s also about encryption…
On Hacking Back
Former DoJ attorney John Carlin writes about hackback, which he defines thus: “A hack back is a type of cyber response that incorporates a counterattack designed to proactively engage with, disable, or collect evidence about an attacker. Although hack backs can take on various forms, they are—by definition—not passive defensive measures.”
His conclusion:
As the law currently stands, specific forms of purely defense measures are authorized so long as they affect only the victim’s system or data.
At the other end of the spectrum, offensive measures that involve accessing or otherwise causing damage or loss to the hacker’s systems are likely prohibited, absent government oversight or authorization. And even then parties should proceed with caution in light of the heightened risks of misattribution, collateral damage, and retaliation…
Prompt Injection in AI Browsers
This is why AIs are not ready to be personal assistants:
A new attack called ‘CometJacking’ exploits URL parameters to pass to Perplexity’s Comet AI browser hidden instructions that allow access to sensitive data from connected services, like email and calendar.
In a realistic scenario, no credentials or user interaction are required and a threat actor can leverage the attack by simply exposing a maliciously crafted URL to targeted users.
[…]
CometJacking is a prompt-injection attack where the query string processed by the Comet AI browser contains malicious instructions added using the ‘collection’ parameter of the URL…
New Attacks Against Secure Enclaves
Encryption can protect data at rest and data in transit, but does nothing for data in use. What we have are secure enclaves. I’ve written about this before:
Almost all cloud services have to perform some computation on our data. Even the simplest storage provider has code to copy bytes from an internal storage system and deliver them to the user. End-to-end encryption is sufficient in such a narrow context. But often we want our cloud providers to be able to perform computation on our raw data: search, analysis, AI model training or fine-tuning, and more. Without expensive, esoteric techniques, such as secure multiparty computation protocols or homomorphic encryption techniques that can perform calculations on encrypted data, cloud servers require access to the unencrypted data to do anything useful…
Friday Squid Blogging: Squid Game: The Challenge, Season Two
The second season of the Netflix reality competition show Squid Game: The Challenge has dropped. (Too many links to pick a few—search for it.)
As usual, you can also use this squid post to talk about the security stories in the news that I haven&… Continue reading Friday Squid Blogging: Squid Game: The Challenge, Season Two
Faking Receipts with AI
Over the past few decades, it’s become easier and easier to create fake receipts. Decades ago, it required special paper and printers—I remember a company in the UK advertising its services to people trying to cover up their affairs. Then, receipts became computerized, and faking them required some artistic skills to make the page look realistic.
Now, AI can do it all:
Several receipts shown to the FT by expense management platforms demonstrated the realistic nature of the images, which included wrinkles in paper, detailed itemization that matched real-life menus, and signatures…