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Oct 12 · Monday

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  1. AttacksarXiv 2610.06848

    TranScope:利用 CPU 性能计数器对 Transformer 做成员推断攻击

    提出 TRANSCOPE,用 CPU 硬件计数器推断训练集成员

    Published
    Attacker
    Black-box
    Evaluated models
    BERT (4.4M-340M), ViT (22M-307M), Pythia (70M-2.8B) and others5

    AbstractTRANSCOPE 揭示了分词器在嵌入表引发的硬件访问局部性差异,证实微架构计数器可突破恒定时间与置信度遮蔽防御。

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  2. AttacksarXiv 2609.36941

    研究者提出针对黑盒 LLM 的实用密钥提取框架

    提出用扰动蒸馏本地代理并离线过滤来提取黑盒模型凭据

    Published
    Attacker
    Black-box
    Evaluated models
    DeepSeek-Coder-7B, LLaMA-3-8B, Qwen2.5-Coder-7B and others6

    Abstract论文提出扰动蒸馏与离线过滤两阶段框架,实现了 output-only 访问下延迟降低的黑盒大模型 API key 提取。

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  3. AttacksarXiv 2609.36331

    无需参考模型:用邻居样本校准单轮成员推理攻击

    提出用邻居分数替代参考模型的单轮成员推断

    Published
    Attacker
    Black-box
    Evaluated models
    目标分类模型(架构与训练流程遵循 Aerni et al.)
    Abstract邻居查询在单模型上恢复逐样本校准,合成邻居加早期检查点最接近 LiRA。

    本文研究 one-round 成员推断:只有一个目标模型、不能再训练参考模型时,如何仍做逐样本校准,并用于单次运行的 DP 审计。

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  4. AttacksarXiv 2609.35699

    论文:蒸馏防御在蒸馏后强化学习下易被攻破

    提出用 API 推理摘要重建轨迹再蒸馏加强化学习,攻破蒸馏防御

    Published
    Attacker
    Black-box
    Evaluated models
    Qwen2.5-0.5B, Qwen2.5-1.5B, Qwen2.5-3B and others12
    Abstract更现实的蒸馏攻击是蒸馏后再 RL。

    这篇工作修订蒸馏攻击的威胁模型:攻击者经合法 API 收集闭源推理数据,先蒸馏自有模型,再做强化学习。作者认为只在蒸馏后评估防御,会漏掉后续 RL,从而高估防御。

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  5. AttacksarXiv 2609.33985

    研究:众包微调数据投毒可放大专有指令抽取

    提出主题锚点投毒,放大众包微调后的专有指令提取

    Published
    Attacker
    Black-box
    Evaluated models
    Qwen2.5-7B-Instruct, Qwen2.5-14B-Instruct, Llama-3.1-8B-Instruct and others4

    Abstract论文提出基于主题锚点的数据中毒攻击,证明低比例的中毒样本可在黑盒条件下隐蔽放大微调指令泄漏。

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  6. AttacksarXiv 2609.10611

    WPMIA:面向严格黑盒大模型的词级概率成员推断攻击

    提出严格黑盒成员推断 WPMIA,用采样估计词级概率判断训练成员

    Published
    Attacker
    Black-box
    Evaluated models
    OPT-6.7B, Pythia-6.9B, LLaMA-13B and others12
    AbstractWPMIA 从续写估计词级似然并对比前缀,黑盒上多数优于所列基线。

    WPMIA 是面向严格黑盒的 LLM 预训练数据成员推断:攻击者只能看到文本续写。

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  7. AttacksarXiv 2609.01723

    研究者提出针对微调 TTS 模型的黑盒成员推断攻击

    提出针对微调 TTS 的黑盒成员推断攻击

    Published
    Attacker
    Black-box
    Evaluated models
    CosyVoice2, F5-TTS, XTTS-v2
    Abstract黑盒 TTS 成员推断以 recitation 加分层语音表示为分数,说话人级强于记录级,DP-SGD 可压到随机附近。

    作者给出一个针对微调文本转语音模型的黑盒成员推断框架,分别审计说话人是否进入微调集,以及某一条文本–音频记录是否进入微调集。微调 TTS 以合成文本和参考语音双条件生成,既有生成模型 MIA 的单条件查询和图像/文本上的逐点比较不能直接套用。作者用 scorable extent 与 memorization elicitation 比较五种查询,认为只有 recitation(用目标转写和干净目标语音要求模型复现)同时满足两条,并把它作为主查询。

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  8. AttacksarXiv 2608.09867

    Researchers steal proprietary LLM inference chains via cross-model compatibility of encrypted inference blocks

    利用加密思维块的跨模型重放,诱导弱模型逐字转写专有推理链

    Published
    Attacker
    Black-box
    Evaluated models
    Claude Opus 4.8, Claude Sonnet 4.6, Claude Haiku 4.5 and others13

    Abstract论文揭示了客户端加密思维块跨模型互换漏洞,提出了低成本提取方法并给出防御方案。

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  9. AttacksarXiv 2604.01039

    Evaluating and hardening LLM system instructions against encoding attack extraction

    Extract system instructions with encoding and structured requests, and harden them by rewriting with CoT

    Published
    Attacker
    Black-box
    Evaluated models
    GPT-4.1-mini, GPT-3.5-turbo, Gemini-2.5-flash and others7
    AbstractEncoded requests can elicit system instructions after a direct refusal.

    This work evaluates and hardens the confidentiality of LLM system instructions under encoded extraction. The authors are concerned with: when direct extraction has been rejected, whether the model still surrenders protected content when the same request is rewritten as a formatting or encoding task.

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  10. AttacksarXiv 2602.20595

    OptiLeak: Efficiently Reconstructing Prompts with Reinforcement Learning in Multi-Tenant LLM Services

    Proposing OPTILEAK, reconstructing others' prompts token-by-token via a KV cache side channel

    Published
    Attacker
    Black-box
    Evaluated models
    Qwen-2.5-3B-Instruct, Qwen-2.5-7B-Instruct, Qwen-2.5-14B-Instruct and others4

    AbstractOPTILEAK uses SFT and hard-token DPO to reduce the number of requests per token; the authors claim the risk of cache prompt leakage is higher than previously reported.

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  11. AttacksarXiv 2602.01757

    Zero2Text: Training-Free Cross-Domain Text Embedding Inversion Attack

    提出 Zero2Text,无需训练地跨域反演文本嵌入

    Published
    Attacker
    Black-box
    Evaluated models
    GTR-Base, Qwen3-Embedding-0.6B, Text-Embedding-3-small and others4
    Abstract零训练在线对齐可在未知域、无泄漏对时从黑盒 embedding 还原句子。

    Zero2Text 是一种不训练 decoder、也不使用泄漏文本–向量对的文本 embedding 反演,针对 RAG 向量库在严格黑盒、目标域未知时的还原。

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  12. AttacksarXiv 2512.16059

    ContextLeak:审计私有上下文学习方法的隐私泄露

    提出 ContextLeak,用金丝雀成员推断审计私有 ICL 泄漏

    Published
    Attacker
    Black-box
    Evaluated models
    Llama3.3-70b, Qwen2.5-72b, GPT-4.1 and others6
    AbstractContextLeak 审计私有 ICL 的 worst-case 泄漏。

    ContextLeak 是一套用成员推断审计私有 ICL 的框架,目标是给 worst-case 泄漏一个经验下界,而不是只引用理论 ε。

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