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~ similar to 2605.01699v3· 20 results

cs.CLcs.AIcs.LGRecentMay 27, 2026

Pressure-Testing Deception Probes in LLMs: Scaling, Robustness, and the Geometry of Deceptive Representations

Sachin Kumar

This paper systematically diagnoses the failure modes of linear deception probes in LLMs, finding that while single-direction probes are insufficient, multi-dimensional probes can recover robust detec…

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cs.CRcs.AIRecentApr 30, 2026

Latent Adversarial Detection: Adaptive Probing of LLM Activations for Multi-Turn Attack Detection

Prashant Kulkarni

The paper introduces 'adversarial restlessness,' an activation-level signature in LLM residual streams, to detect multi-turn prompt injection attacks with high accuracy.

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cs.CLcs.CRcs.LGRecentApr 3, 2026

Learning the Signature of Memorization in Autoregressive Language Models

David Ilić, Kostadin Cvejoski, David Stanojević, Evgeny Grigorenko

The paper introduces a novel, transferable learned attack (LT-MIA) that detects a universal 'signature of memorization' in language models, achieving high accuracy across diverse model architectures (…

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cs.LGcs.CLRecentMay 30, 2026

Task Structure Reverses Layerwise State Encoding in Sequence Models

Yuhang Jiang

The paper demonstrates that the location and nature of state encoding in sequence models are not fixed architectural traits but are highly dependent on the specific task, showing that the encoding pro…

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cs.CLcs.AIcs.LGRecentMay 30, 2026

Detection vs. Execution: Single-Bucket Probes Miss Half the Mamba-2 State Sink

Yuhang Jiang

The paper demonstrates that in Mamba-2, single-bucket probes can detect a large functional signature (detection layer) that is not fully responsible for the actual computation (execution layer), chall…

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cs.LGcs.AIRecentMay 27, 2026

When and How Long? The Readout-Mediator Angle in Temporal Reasoning

Shreyas Fadnavis, Praitayini Kanakaraj, Felix Wyss

The paper introduces the 'readout-mediator angle' to demonstrate that simple linear probes, while capable of decoding information, often capture directions orthogonal to the model's actual causal comp…

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cs.CLRecentMay 29, 2026

TRACE: Discovering Task-Specific Parameter via Adaptation-Aware Probing for Continual Fine-Tuning

Xiaosong Han, Ke Chen, Xindi Dai, Di Liang +6 more

TRACE proposes a novel method to mitigate catastrophic forgetting in continual LLM fine-tuning by identifying and isolating a small, task-specific subset of essential parameters for each task.

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cs.CLcs.CRRecentApr 16, 2026

Segment-Level Coherence for Robust Harmful Intent Probing in LLMs

Xuanli He, Bilgehan Sel, Faizan Ali, Jenny Bao +2 more

The paper introduces a robust streaming probing objective that requires multiple evidence tokens to support a prediction, significantly improving the detection of harmful intent in LLMs, especially in…

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cs.LGcs.AIcs.CRRecentJun 2, 2026

PURGE: Projected Unlearning via Retain-Guided Erasure

Vedant Jawandhia, Daksh Ahuja, Ghufran Alam Siddiqui, Prashant Trivedi +2 more

PURGE is a novel machine unlearning algorithm that leverages the duality between continual learning and unlearning to achieve high data retention while making the unlearned model indistinguishable fro…

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cs.CRcs.CLRecentJun 2, 2026

PsychoPass: Geometric Profiling of Multi-Turn Adversarial LLM Conversations

Muberra Ozmen, Subhabrata Majumdar

The paper introduces PsychoPass, a framework that analyzes the geometric trajectory of multi-turn conversations in embedding space to detect adversarial intent early, before harmful content is generat…

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cs.CRRecentMay 14, 2026

Defenses at Odds: Measuring and Explaining Defense Conflicts in Large Language Models

Xiangtao Meng, Wenyu Chen, Chuanchao Zang, Xinyu Gao +4 more

This paper systematically measures and explains how sequential model defenses can conflict, finding that 38.9% of ordered defense sequences cause measurable risk exacerbation due to anti-aligned param…

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cs.AIcs.CRRecentMay 27, 2026

Refusal Before Decoding: Detecting and Exploiting Refusal Signals in Intermediate LLM Activations

Matteo Gioele Collu, Riccardo Conte, Alberto Giaretta, Denis Kleyko +3 more

The paper demonstrates that refusal behavior in Large Language Models (LLMs) is encoded as an actionable, linearly decodable signal in intermediate transformer activations, allowing for early detectio…

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cs.AIcs.CRRecentMay 27, 2026

Refusal Before Decoding: Detecting and Exploiting Refusal Signals in Intermediate LLM Activations

Matteo Gioele Collu, Riccardo Conte, Alberto Giaretta, Denis Kleyko +3 more

The paper demonstrates that refusal behavior in Large Language Models (LLMs) is encoded as an actionable, linearly decodable signal in intermediate transformer activations, allowing for early detectio…

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cs.CLcs.AIcs.LGRecentMay 31, 2026

MENTIS: What Belief Changes Under Alignment? Measuring Multi-Scale Latent Torsion in Language Models

Partha Pratim Saha, Samarth Raina, Mayur Parvatikar, Amit Dhanda +3 more

The paper introduces MENTIS, a geometry-first framework that measures how preference alignment structurally changes the internal computations of language models, finding that these changes are selecti…

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cs.CRcs.SERecentApr 30, 2026

How Code Representation Shapes False-Positive Dynamics in Cross-Language LLM Vulnerability Detection

Maofei Chen, Laifu Wang, Yue Qin, Yuan Wang +2 more

The paper demonstrates that using raw source text for fine-tuning LLMs on vulnerability detection causes high false-positive rates by memorizing surface-level syntax, a problem mitigated by using Abst…

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cs.CRcs.CYRecentJun 3, 2026

Selection-Aware Diagnostics for Chain-of-Thought Answer Hijacking

Jianwei Tai

The paper investigates the fragility and recovery mechanisms of chain-of-thought (CoT) answer hijacking, demonstrating that specific problem cells are susceptible to targeted recovery and that source…

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cs.CLcs.AIcs.LGRecentMay 27, 2026

MemGuard: Preventing Memory Contamination in Long-Term Memory-Augmented Large Language Models

Hyeonjeong Ha, Jeonghwan Kim, Cheng Qian, Jiayu Liu +6 more

MemGuard introduces a type-aware memory framework to prevent heterogeneous memory contamination in long-term memory-augmented LLMs, significantly improving memory reliability and efficiency.

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cs.CRcs.LGRecentMay 13, 2026

Backdoor Channels Hidden in Latent Space: Cryptographic Undetectability in Modern Neural Networks

Marte Eggen, Eirik Reiestad, Kristian Gjøsteen, Inga Strümke

The paper demonstrates that cryptographically undetectable backdoors can be embedded into modern, state-of-the-art neural networks by exploiting inherent, latent geometric properties of the learned re…

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cs.CRcs.AIcs.CLRecentMay 5, 2026

Exposing LLM Safety Gaps Through Mathematical Encoding:New Attacks and Systematic Analysis

Haoyu Zhang, Mohammad Zandsalimy, Shanu Sushmita

The paper demonstrates that encoding harmful prompts as genuine mathematical problems, rather than just using mathematical formatting, effectively bypasses the safety filters of large language models.

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cs.LGcs.AIRecentMay 28, 2026

When LLMs Learn to Be Consistently Wrong: A Multi-Model Study of Linear Representations of Synthetic Deception

Vahideh Zolfaghari

The study demonstrates that robust, domain-invariant representations of synthetic deception can be rapidly entrenched in LLMs using modest fine-tuning, detectable by linear probes even in early layers…

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