Senator Ron Wyden has asked the Federal Trade Commission to investigate Microsoft over its continued use of the RC4 encryption algorithm. The letter talks about a hacker technique called Kerberoasting, that exploits the Kerberos authentication system. This article has been…
Category: Schneier on Security
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…
Upcoming Speaking Engagements
This is a current list of where and when I am scheduled to speak: I’m speaking and signing books at the Cambridge Public Library on October 22, 2025 at 6 PM ET. The event is sponsored by Harvard Bookstore. I’m…
New Cryptanalysis of the Fiat-Shamir Protocol
A couple of months ago, a new paper demonstrated some new attacks against the Fiat-Shamir transformation. Quanta published a good article that explains the results. This is a pretty exciting paper from a theoretical perspective, but I don’t see it…
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. This article has been indexed from Schneier…
AI in Government
Just a few months after Elon Musk’s retreat from his unofficial role leading the Department of Government Efficiency (DOGE), we have a clearer picture of his vision of government powered by artificial intelligence, and it has a lot more to…
Friday Squid Blogging: The Origin and Propagation of Squid
New research (paywalled): Editor’s summary: Cephalopods are one of the most successful marine invertebrates in modern oceans, and they have a 500-million-year-old history. However, we know very little about their evolution because soft-bodied animals rarely fossilize. Ikegami et al. developed…
GPT-4o-mini Falls for Psychological Manipulation
Interesting experiment: To design their experiment, the University of Pennsylvania researchers tested 2024’s GPT-4o-mini model on two requests that it should ideally refuse: calling the user a jerk and giving directions for how to synthesize lidocaine. The researchers created experimental…
Generative AI as a Cybercrime Assistant
Anthropic reports on a Claude user: We recently disrupted a sophisticated cybercriminal that used Claude Code to commit large-scale theft and extortion of personal data. The actor targeted at least 17 distinct organizations, including in healthcare, the emergency services, and…
Indirect Prompt Injection Attacks Against LLM Assistants
Really good research on practical attacks against LLM agents. “Invitation Is All You Need! Promptware Attacks Against LLM-Powered Assistants in Production Are Practical and Dangerous” Abstract: The growing integration of LLMs into applications has introduced new security risks, notably known…