Active defenses (Privacy Sanitization, Adversarial Obfuscation) reduce but do not eliminate persona-skill leakage, leaving personality and background exposed¶
Claim · All claims
Evidence · 1 study · designr2·q2
Currency · newest study 2026 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · not reviewed by a person · recheck by 2029: tool and model accuracy changes quickly
Subclaims¶
Reading the evidence codes
q is the design tier, i the impact, n the sample, and the kind with its r
the rigour judged within that kind: what each code means.
This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.
q2 i? Online Privacy Sanitization reduces Skill Coverage, QA Acc, and VocabGain but personality and background information remain hard to remove; post-hoc Adversarial Obfuscation yields smaller reductions. → Yongli Xiang 2026
Evidence¶
Yongli Xiang 2026¶
Yongli Xiang, Zhifang Zhang, Bojun Yang, Ziming Hong, Lei Feng, Miao Xu, Tongliang Liu. (2026). When Agents Learn to Be You: Benchmarking Privacy Leakage, Impersonation Risk, and Defenses in Persona Skills. arXiv. https://arxiv.org/abs/2608.03700 doi:10.48550/arxiv.2608.03700
q2 · i? · design · r2
Defense evaluation on GPT 5.4 in Table 2. Online PS reduces Skill Coverage, QA Acc, and VocabGain "to 51.7, 40.6, and 9.0 under Direct Distill", with mitigation most pronounced for communication-style signals (communication VocabGain drops from 87.3 to 6.5). Descriptive percentages; no effect sizes printed.
"In con- trast, personality and background information are harder to remove,withpersonalitySkillCoverageremaininghighafter OnlinePSunderbothDirectDistill(70.0)andColleagueDis- till (68.3). Post-hoc ADV yields smaller reductions, leaving communication Skill Coverage high and, under Colleague Distill, even increasing overall VocabGain to 20.9."
Discussion¶
Related Claims¶
- Skill-equipped agents reproduce target users' attributes and language, enabling impersonation across unseen contexts — related
- Persona-skill distillation encodes substantial private information into skill artifacts, persisting across agent backbones and distillation protocols — a broader claim this one bears on
- Skill-level leakage is strongest for communication style and personality, not explicit demographics — related
- Passive backdoor defense (SBD) effectiveness is distillation-dependent, degrading under persona-centric abstraction — related
- Privacy protection in the framework is partial: three residual leakage channels remain open — related
Page metadata
| Field | Value |
|---|---|
type |
claim |
id |
active-defenses-limited-partial-protection |
title |
Active defenses (Privacy Sanitization, Adversarial Obfuscation) reduce but do not eliminate persona-skill leakage, leaving personality and background exposed |
description |
Active defenses (Privacy Sanitization, Adversarial Obfuscation) reduce but do not eliminate persona-skill leakage, leaving personality and background exposed |
status |
review |
evidence_strength |
moderate |
newest_evidence |
2026 |
source_checked |
2026-10-20 |
recheck_by |
2029 |
generated |
by process:wiki-ingest on 2026-10-10 |
trust |
unverified — no one has confirmed this page's content |
sources |
1 — yongli-xiang-2026 |
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