{"data":{"id":"565588a0-b767-46d9-9108-f2ccdb787e1f","title":"Reversible Pseudonymisation of Documents Sent to External LLMs: an Open Bilingual Benchmark and an Engine","summary":"The author benchmarks five existing open pseudonymisation tools and a regex baseline on Russian and UK English, then builds an open engine from the two strongest. On held-out synthetic documents from the generator the engine was developed on, it leaves a whole value visible in 0.3% and 0.2% of documents, while the best existing tools do so in 61% (Russian) and 58% (UK). In Russian, name placeholders restore at only 94.6%, below the 99% threshold.","solution":"N/A -- no mitigation discussed in source.","labels":["privacy","research"],"sourceUrl":"https://arxiv.org/abs/2610.34012v1","publishedAt":"2026-10-25T02:50:43.000Z","cveId":null,"cweIds":null,"cvssScore":null,"cvssSeverity":null,"severity":"info","attackType":[],"issueType":"research","affectedPackages":null,"affectedPackageNames":null,"affectedPackageRefs":null,"affectedVendors":[],"affectedVendorsRaw":["external LLMs","pii-guard"],"classifierModel":"claude-haiku-5-5","classifierPromptVersion":"v4","summaryPromptVersion":"v2","headline":null,"headlinePromptVersion":null,"cvssVector":null,"attackVector":null,"attackComplexity":null,"privilegesRequired":null,"userInteraction":null,"exploitMaturity":null,"epssScore":null,"epssCheckedAt":null,"kevDateAdded":null,"advisoryAliases":null,"affectedPackagesSource":null,"affectedPackagesCheckedAt":null,"patchAvailable":null,"disclosureDate":"2026-10-25T02:50:43.000Z","capecIds":null,"crossRefCount":0,"attackSophistication":"moderate","impactType":["confidentiality"],"aiComponentTargeted":"api","llmSpecific":true,"classifierConfidence":0.9,"researchCategory":"preprint","atlasIds":null}}