PII Arena
HF detector

ru-legal-ner+homoglyph PII detection benchmark

Measured on 3 of 41 retained datasets under the same frozen scoring and masking protocol.

59.24%fully hidden annotations
76.58%detected / overlapped
11.07%extra masking
CPU characters / second

Strengths

Highest complete-masking rates by normalized data type.

People's names74.40%1,107 / 1,488
Documents & identifiers70.02%1,880 / 2,685
Phone numbers & email64.57%503 / 779

Watch list

Lowest observed complete-masking rates; inspect before deployment.

Network identifiers3.05%11 / 361
Addresses & locations38.01%539 / 1,418
Passwords, keys & tokens49.35%189 / 383

Language coverage

The overall leader can differ from the best choice for one language slice.

LanguageDatasetsFully hidden ↑Detected ↑Extra masking ↓
English141.32%77.08%10.02%
Russian259.96%76.56%13.46%

Configuration, source and version

Family
HF
Revision
c0313a42ac147ccc38f5c3b0b3e77cab53208683
Eligible datasets
3 / 41
Character F1
0.387
Untouched diagnostic
23.42% · 1,753 / 7,486
Benchmark version
1.0.3 · 2026-09-09
CPU seconds / 10k chars
Not measured
GPU seconds / 10k chars
0.143

Results by dataset

Complete masking is primary; detection shows whether any character overlapped.

DatasetGold annotationsFully hidden ↑Detected ↑Extra masking ↓
corrupt-secrets-issues28841.32%77.08%10.02%
corrupt-redmadrobot5,53157.35%73.02%12.69%
corrupt-hivetrace1,66768.63%88.30%18.65%