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November 9, 2026

Schneier on Security

AI Security

Two weeks ago, I attended the [un]prompted AI security conference in San Francisco. It was an excellent event: three days of very dense talks about all aspects of...

November 6, 2026

Schneier on Security

Friday Squid Blogging: New Jurassic Squid Predecessors

News story: “Scientists discover a bizarre Jurassic ‘squid’ unlike anything ever seen.” Scientists have identified the “fattest” belemnite ever discovered, a bizarre, barrel-shaped squid relative that lived in...

November 3, 2026

Schneier on Security

AIs Hacking the Law

In both a 2021 essay and my 2022 book, A Hacker’s Mind, I talk about AIs finding vulnerabilities and exploits—hacking—the legal system. Here’s some demonstrations of this from...

November 2, 2026

Schneier on Security

AI Vulnerability Finding

A comment: 3% of ‘critical’ software security bugs, in all of recorded history, have been found in the last month. This is on pace to find another ~100,000...

October 30, 2026

Schneier on Security

Bloatware in Aftermarket Auto Parts

This story is interesting: One Civic owner purchased a cheap aftermarket head unit off Amazon, and decided to have Claude work its magic on it, like it would...

October 28, 2026

October 27, 2026

Schneier on Security

Hiding Capabilities in AI Models

Interesting research: “AI Models Can Provably Hide Arbitrary Capabilities” Abstract: Capability evaluations aim to surface dangerous model behaviors before deployment, but their reliability depends on the assumption that...

October 26, 2026

Schneier on Security

Bias in Qwen3-Coder Model

Interesting research: TL;DR: Chinese AI models now sit inside Western products, and some carry geopolitical triggers: tell the model who the code is for, and the security of...

October 23, 2026

Schneier on Security

Compromised TLS Certificates

The Indian CA eMudhra Limited has eight TLS certificates with laughably weak private keys: The compromised eMudhra keys were defective at a level that’s challenging the imagination of...

October 22, 2026

Schneier on Security

New Serious PHP Vulnerabilities Released and Patched

PHP maintainers have released fixes for two critical vulnerabilities: PHP 8.5.12, 8.4.27, 8.3.36 and 8.2.35 fix two critical vulnerabilities that can allow unauthenticated remote code execution. All PHP...

October 21, 2026

October 20, 2026

Schneier on Security

Possible new Cellebrite iPhone Radio Zero-Day

Justin.sh is reporting on a confidential Cellebrite document that has been leaked to him: Cellebrite calls it Advanced Unlocks (AU from here on), not to be confused with...

October 19, 2026

Schneier on Security

Training AIs to Solve CAPTCHAs

Interesting research: Abstract: Vision-language models (VLMs) can solve visual CAPTCHAs without task-specific training, but the agents built on them approach every challenge from scratch. For such an agent,...

October 16, 2026

Schneier on Security

Backdooring Open-Weight AI Models

This is a problem: Any open model whose weights have been edited can carry a backdoor, whether it’s a task-specific fine-tune, a merged adapter or an abliterated build....

October 15, 2026

Schneier on Security

Measuring Human Cryptanalysis Effort

Matthew Green has a new site that tries to estimate the number of cryptanalyst-hours that have been spent analyzing different public-key algorithms: Abstract: We estimate how much public...

October 14, 2026

Schneier on Security

Upcoming Speaking Engagements

This is a current list of where and when I am scheduled to speak: I’m speaking at ATTENTION: Democracy, Rebuilt in Montreal, Canada. The event runs October 21–23,...

Schneier on Security

The Future of AI Cryptanalysis

Matthew Green has been writing a rather pessimistic series of posts about the potential for AI systems to vastly outperform humans in cryptanalysis of both symmetric and public-key...

Schneier on Security

Cyberattack on Connected Fridges in France

Another IoT cyberattack, this one in France: Hackers gained control of the software that regulates the temperatures of the refrigeration units, forcing some to warm to 50C (120F)...