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Oct 12 · Monday

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  1. AttacksarXiv 2610.06670

    研究者提出 Reward Stealing Attack,从对齐模型行为反推安全奖励实施攻击

    提出 ReSA,从对齐模型行为恢复安全奖励并在解码时反转

    Published
    Evaluated models
    Llama3.1-8B-Instruct, Gemma-7B-Instruct, Qwen2.5-7B-Instruct and others9
    AbstractReSA 用最大熵 IRL 从对齐模型行为恢复代理安全奖励,并在解码时反转以诱导有害输出。

    ReSA 是一种对抗攻击:从对齐模型的可观察行为恢复代理安全奖励,再在解码时把该奖励反过来用。。

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  2. AttacksarXiv 2610.03166

    LiBRA:通过双向隐空间优化实现检测感知的图像水印去除

    提出 LiBRA,在潜空间双向优化以规避图像水印双侧检测

    Published
    Attacker
    White-box
    Evaluated models
    Stable Signature, YU1, HiDDeN and others4

    AbstractLiBRA 用双向潜空间优化规避双侧水印检测,并提高相对反转基线的保真。

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  3. AttacksarXiv 2610.03124

    研究提出 Untag 攻击框架,使开源大模型触发标签滥用检测机制失效

    提出 UNTAG,绕过开源权重模型的 trigger-tag 滥用检测

    Published
    Evaluated models
    Llama2 (7B), Llama3 (8B), Qwen2.5 (7B)
    Abstract作者用 UNTAG 评估 trigger-tag,认为其不能充当开放权重滥用检测的主要边界。

    UNTAG 是针对开放权重 LLM 上条件滥用检测 trigger-tag 的统一攻击评估:信号可以在解码期注入,也可以写进权重,但攻击者若能改输出或改已发布权重,检测可以失效。

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  4. AttacksarXiv 2609.10117

    研究揭示基于混淆的端侧 LLM 保护方案的安全边界

    提出 Collapse,从端侧混淆暴露视图抽取高效用替代模型

    Published
    Evaluated models
    BERT-Base, ViT-Base, Qwen2.5-0.5B and others4
    AbstractOprior 是四原语复合的安全边界,Collapse 利用列方向泄漏抽取替代模型,Oext 只被同一攻击评测。

    这篇工作用代数原语统一若干 TEE 卸载混淆,给出该族的典范边界,再说明该边界挡不住一种分阶段模型抽取。。

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  5. The Continuation vs. Refusal Debate: Mechanism Analysis of Continuation-Triggered Jailbreaks in Large Language Models

    Analyzing the attention head mechanism of continuation-triggered jailbreaks and proposing HCS

    Published
    Evaluated models
    LLaMA-2-7B-Chat, Qwen2.5-7B-Instruct
    AbstractThe authors state that jailbreaks arise from competition between two types of heads, and that HCS plus distillation can use this competition for inference-time intervention.

    The authors use attention head mechanism analysis for continuation-triggered jailbreaks: under the same harmful instruction, moving the continuation suffix from after the instruction to outside the prompt boundary makes the model more likely to continue generating along the suffix.

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  6. AttacksarXiv 2601.04261

    针对大语言模型后门指纹的抑制攻击

    提出 TFA 与 SVA,抑制 ensemble 后门指纹验证

    Published
    Evaluated models
    LLaMA2-7B, LLaMA3.1-8B-It, Qwen2.5-7B and others11
    Abstract两种 ensemble 攻击 TFA/SVA 抑制后门指纹。

    TFA 与 SVA 是针对后门式 LLM 指纹的 ensemble 抑制攻击,不改模型参数。所有者用 SFT 写入秘密对,只通过 API 验证版权。攻击者未授权取得模型,不知道触发和指纹,却要把每个模型的验证变成失败,同时让 ensemble 至少不差于性能最高的单模型。

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