# Paper: MemLineage: Lineage-Guided Enforcement for LLM Agent Memory

---
type: paper
title: "MemLineage: Lineage-Guided Enforcement for LLM Agent Memory"
authors: Ciyan Ouyang, Rui Hou
year: 2026
venue: arXiv
url: https://arxiv.org/abs/2605.14421
code_url:
source: arxiv
collected_at: 2026-07-08
published_at: 2026-05-14
updated_at: 2026-05-14
status: skimmed
relevance: high
topics:
  - agent-evaluation
  - computer-use
  - memory
  - tool-use
methods:
  - cryptographic-provenance
  - derivation-lineage
  - sensitive-action-gate
benchmarks:
  - custom-cross-session-memory-harness
  - AgentDojo-bridge
models:
  -
datasets:
  - cs.CR
  - cs.AI
related_concepts:
  - memory-provenance
  - memory-poisoning
related_jobs:
  -
related_experiments:
  - KC-001-agent-memory-pilot
related_projects:
  - learning/agent-memory
collection_score: 17
collection_queries: agent-memory
---

## One-line Takeaway

签名只能证明谁写入；敏感行动还必须检查当前理由是否沿派生链继承了不可信来源。

## Pilot Skim

- problem: 恶意外部内容可以经多次 memory derivation 被语义洗白，未来再触发敏感动作。
- method: 为条目附加签名与 derivation DAG，把来源 trust 传播到 action gate。
- evidence: 自定义 deterministic harness 的三类攻击中，只有 lineage 方案全部达到 0 ASR。
- boundary: headline 是机制隔离 benchmark，不是完整公共 benchmark；未完成大规模 adaptive attack，且假设模型推理路径可信。

## Used In

- [Agent Memory evidence matrix](../../learning/agent-memory/evidence-matrix.md)

## Links

- arXiv: https://arxiv.org/abs/2605.14421
