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cybersecurity

1,407 papers

#artificial intelligence Preprint Sep 2026

Beyond Semantic Narrowing: Robust and Efficient LLM Watermarking with Hamming Neighborhoods

The proposed HammingMark is a semantic watermarking method that uses the semantic hash of the preceding sentence as a dynamic center and accepts candidates whose hashes fall within its Hamming neighborhood, which achieves strong robustness, high detectability, and near-unwatermarked generation quality.

Ze-Wen Sun, Tong-Yang Zhao, Li-Yao Xiang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

ToolFence: Fine-Grained Authorization for Secure Tool-Using LLM Agents

This work introduces ToolFence, which compiles a typed authorization blueprint before execution, enforces it through a deterministic monitor, and when the blueprint is incomplete asks a judge to grant new capabilities rather than adjudicate each concrete call, improving runtime efficiency.

Yan-Jie Li, Xiang-Yu He, Xue-Long Dai et al. · 0 citations
#artificial intelligence Preprint Sep 2026

OPFL: Optimistic Verification of Federated Learning via Empirical Boundary

OPFL calibrates an empirical boundary offline and uses it to distinguish benign numerical deviations from malicious manipulation, and adopts optimistic verification by post auditing only sampled training steps to reduce the cost of expensive MPC replay.

Hong-Xu Su, Jian-Zhu Yao, Xue-Chao Wang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Controlled Decoding Attacks on Black-Box LLMs

This work introduces \method{}, a framework for jailbreaking through text-only continuation interfaces that permit repeated sampling and assistant-prefix continuation, and achieves the highest mean score most comparisons against baselines.

Jesson Wang, Shawn Li, Wei Yang et al. · 2 citations
#artificial intelligence Preprint Sep 2026

SKILLLITE: Evidence-Guided Malicious Skill Auditing with Compact LLMs

Experiments show that SKILLLITE improves malicious Skill detection across different compact LLM backbones and outperforms existing representative auditing baselines, and generalizes to behaviorally confirmed in-the-wild malicious Skills.

Hao-Ran Ou, Ge-Lei Deng, Xuan-Ye Zhang et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Safer Content or Firmer Refusals? A Hybrid Perturbation Defense for Alignment under Harmful Fine-tuning

This work proposes VaccineBooster, a single alignment procedure that combines embedding perturbation and weight-level gradient attenuation within each training step, and indicates a trade-off: embedding perturbation primarily reduces flagged harmful content, whereas gradient attenuation primarily preserves explicit ref...

M. Akram, Mufid Kamel Marican, Anvesh Reddy Yenugu et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Does the Unsafe Gradient Survive a Conversation? On the Fragility of Gradient-Based Jailbreak Detection in Multi-Turn Dialogue

These findings show that gradient-based signals can support multi-turn jailbreak detection, but reliable deployment requires calibration on realistic benign conversations, short-window scoring, length-aware thresholds, and evaluation across attack types and model architectures.

Omar Sheta, Rinku Deuja, Hadi Masoudi et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Quantization Enables Private Dense Retrieval against Malicious Service Providers

The results suggest that private dense retrieval is already practical for moderately sized, privacy-sensitive corpora when minute-scale latency is acceptable, and formulates a two-round cryptographic protocol that provides both guarantees.

Louis Tremblay Thibault, Sofiane Azogagh, Marc-Olivier Killijian et al. · 0 citations
#artificial intelligence Preprint Sep 2026

Audience-Bound Persistent Memory: Authorization Across the Memory Lifecycle

A personal language agent that acts for its owner across private and shared conversations can learn a fact from one audience and later place it in the context it assembles for another. We study authorization before context across the whole memory lifecycle. Each memory item carries the audience present when it was reco...

Si-Bo Liu · 0 citations
#artificial intelligence Preprint Sep 2026

Calibrating One-Round Membership Inference with Neighbors

A key observation is that reference models serve only to reveal how an example behaves under models not trained on it, and that querying the target model on nearby samples yields the same information, and that querying the target model on nearby samples yields the same information.

Francesco Rita, Jie Zhang, Florian Tramèr · 0 citations

From tech blogs

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Microsoft Research Blog Nov 3, 2026

Learn the rules: The hacker mindset

Research Manager Mike Walker reflects on a career spanning hacker culture, cybersecurity, and AI, sharing lessons about trust, teamwork, leadership, and why solving difficult problems requires curiosity, judgment, agility—and an understanding of the rules. The post Learn the rules: The hacker mindset appeared first on Microsoft Research.

GPT-Lab Oct 30, 2026

Black October? The Week AI Changed the Cybersecurity Conversation

Critical flaws, compromised release channels and agentic AI threats landed within days of each other in mid-October 2026. Why “Black October” may say more about how well we now find weaknesses than about the attacks themselves. The post Black October? The Week AI Changed the Cybersecurity Conversation appeared first on GPT-Lab.

Google DeepMind Blog Jul 17, 2026

Introducing Gemini 3.5 Flash Cyber

Google introduces Gemini 3.5 Flash Cyber, a lightweight cybersecurity model to find and patch vulnerabilities.

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