Indirect Prompt Injection Attacks Against LLM Assistants
September 3 2025Really good research on practical attacks against LLM agents.
Abstract: The growing integration...
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1965 Cryptanalysis Training Workbook Released by the NSA
September 2 2025In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term “Stethoscope” to describe a diagnostic computer program used to unravel the internal...
Read moreFriday Squid Blogging: Catching Humboldt Squid
August 30 2025First-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...
Read moreBaggage Tag Scam
August 29 2025I just heard about this:
There’s a travel scam warning going around the internet right now: You should keep your baggage tags on your bags until you get...
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The UK May Be Dropping Its Backdoor Mandate
August 28 2025The US Director of National Intelligence is reporting that the UK government is dropping its backdoor mandate against the Apple iPhone. For now, at least, assuming that Tulsi Gabbard...
Read moreWe Are Still Unable to Secure LLMs from Malicious Inputs
August 27 2025Nice indirect prompt injection attack:
Bargury’s attack starts with a poisoned document, which is shared to a potential victim’s Google Drive. (Bargury says a victim could have also...
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Encryption Backdoor in Military/Police Radios
August 26 2025I wrote about this in 2023. Here’s the story:
Three Dutch security analysts discovered the vulnerabilities—five in total—in a European radio standard called TETRA (Terrestrial Trunked Radio), which...
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Poor Password Choices
August 25 2025Look at this: McDonald’s chose the password “123456” for a major corporate system.
Read moreFriday Squid Blogging: Bobtail Squid
August 23 2025Nice 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...
Read moreI’m Spending the Year at the Munk School
August 23 2025This academic year, I am taking a sabbatical from the Kennedy School and Harvard University. (It’s not a real sabbatical—I’m just an adjunct—but it’s the same idea.) I will...
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