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Oct 13 · Tuesday

All papers

Found 14 papers

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  1. AttacksarXiv 2610.05894

    研究者提出闭环偏见注入攻击

    提出闭环激活引导,在扩散语言模型去噪过程中注入定向偏见

    Published
    Attacker
    Gray-box
    Evaluated models
    LLaDA-8B-Instruct, Dream-v0-Instruct-7B, LLaDA-MoE-7B-A1B-Instruct

    Abstract通过去噪中间概率反馈动态调节残差流转向,证明扩散语言模型在推理服务栈中存在闭环偏见注入脆弱性。

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  2. DefensesarXiv 2610.04426

    UnAct:无需梯度的定向激活干预实现类别遗忘

    提出 UnAct,仅以前向激活干预从分类器中遗忘指定类别

    Published
    Evaluated models
    ResNet-18, ViT-B/16
    AbstractUnAct 用前向激活做类别遗忘。

    UnAct 是一种事后类别遗忘:删除请求可以只有少量该类图像,且没有标签和保留数据。它不用梯度,只对遗忘图像做前向。编辑对象是分类器所读的后期单元。

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  3. DefensesarXiv 2610.00348

    NEEDLE:通过权重正交化移除 LLM 后门

    提出 NEEDLE,用权重正交化在已知触发器时去除大模型后门

    Published
    Evaluated models
    Gemma-3-4B-IT, Qwen3-4B-Instruct-2507, Gemma-3-12B-IT

    AbstractNEEDLE 用闭式权重编辑去掉已知触发器的后门,并保住拒绝子空间。

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  4. LLM Forensics:用稀疏自编码器定位并控制后门触发机制

    用 SAE 定位后门触发机制并分离检测与因果控制

    Published
    Evaluated models
    Gaperon-1B, Gaperon-8B, Gaperon-24B
    AbstractGaperon 语言切换后门可分成检测、残差路由和后期语言跟踪三类 SAE 特征,只有部分能改行为。

    作者用稀疏自编码器分解 Gaperon 中无害的语言切换后门,区分识别触发的特征与真正能抑制或诱发该行为的特征。固定触发使英语提示在 Gaperon-1B 与 8B 上续写成法语或德语。

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  5. 论文提出拒答的几何解释:事后安全训练脆弱,预训练期持续安全共训更抗攻击

    解释后验安全的权重几何脆弱性,并提出预训练持续安全共训练

    Published
    Evaluated models
    Qwen-2.5-7B, Qwen-2.5-7B-Instruct, Llama-3-8B and others15

    Abstract论文将后验安全脆弱性归因于正交抑制,并提出通过预训练持续共训练实现具备微调抗性的安全防护。

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  6. DefensesarXiv 2609.00786

    MROP:针对 Deep JSCC 后门攻击的掩码区域优化净化方法

    提出 MROP,在发射端推理时纯化输入以抵御训练投毒后门

    Published
    Evaluated models
    DeepJSCC, SwinJSCC
    AbstractMROP 不重训练,在发射端纯化补丁后门。

    MROP 是 deep JSCC 无线图像传输上的推理时输入纯化,对象是矩形补丁后门。

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  7. AttacksarXiv 2606.11817

    研究:语法约束解码可越狱 LLM 生成恶意代码,并提出 CodeShield 防御

    提出 CodeSpear 越狱,借语法约束解码生成恶意代码,并给出 CodeShield 防御

    Published
    Attacker
    Black-box
    Evaluated models
    Qwen2.5-Coder-7B, Qwen2.5-Coder-32B, Qwen2.5-7B and others10

    Abstract论文发现语法约束解码会破坏自然语言安全对齐,提出 CodeSpear 越狱攻击与基于蜜罐代码对齐的 CodeShield 防御。

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  8. DefensesarXiv 2603.03206

    Understanding and mitigating dataset contamination in large language model steering

    Mitigating steering dataset contamination with Lee-Valiant robust means

    Published
    Evaluated models
    Llama-3.2-3B-Instruct, Mistral-7b-Instruct-v0.3, OLMo-2-1124-7B-Instruct
    AbstractData poisoning can alter steering; coordinated injection is strongest.

    The authors study how much behavioral control remains at inference time when contrastive steering's training data is contaminated, and whether the robust mean can catch it.

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  9. AttacksarXiv 2602.17837

    TFL: Targeted Bit-Flip Attack against Large Language Models

    Proposes TFL targeted bit flipping so that selected prompts output false answers while unrelated queries remain correct

    Published
    Evaluated models
    Qwen3-8B, DeepSeek-R1-Distill-Qwen-14B, LLaMA-3.1-8B-INSTRUCT
    AbstractTFL searches weight bits on three LLMs to make specified prompts produce target keywords while constraining degradation on unrelated tasks.

    TFL is a framework for targeted bit flips on LLM main memory weights: the attacker wants a selected prompt to output a specified false answer keyword while limiting degradation on unrelated queries.

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  10. DefensesarXiv 2602.03085

    Triggers in the Haystack: Extracting and Reconstructing LLM Backdoor Triggers

    提出推理扫描器,在仅有模型文件时检测后门并重构触发词

    Published
    Evaluated models
    gemma-3-270m-it, DeepSeek-R1-Distill-Qwen-1.5B, Phi-4-mini-instruct and others8
    Abstract用记忆泄漏和内部信号重构触发词。

    这是一个只做推理的 sleeper agent 扫描器:在不知触发词和目标行为时,检测因果语言模型里的条件后门并重构触发词。。问题在于,后门只在触发词出现时偏离基线,而开放仓库和网页投毒使检测方通常没有触发词、目标或激活语料。

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  11. 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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