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william (at) integrinet [dot] org

Piiranha-v1: Protect your personal information!

Piiranha (cc-by-nc-nd-4.0 license) is trained to detect 17 types of Personally Identifiable Information (PII) across six languages. It successfully catches 98.27% of PII tokens, with an overall classification accuracy of 99.44%. Piiranha is especially accurate at detecting passwords, emails (100%), phone numbers, and usernames.

Performance on PII vs. Non PII classification task:

• Precision: 98.48% (98.48% of tokens classified as PII are actually PII)
• Recall: 98.27% (correctly identifies 98.27% of PII tokens)
• Specificity: 99.84% (correctly identifies 99.84% of Non PII tokens)

Piiranha was trained on H100 GPUs generously sponsored by the Akash Network

Total downloads: 1.118 million and counting!

Model Description

Piiranha is a fine-tuned version of microsoft/mdeberta-v3-base. The context length is 256 Deberta tokens. If your text is longer than that, just split it up.

Supported languages: English, Spanish, French, German, Italian, Dutch

Supported PII types: Account Number, Building Number, City, Credit Card Number, Date of Birth, Driver's License, Email, First Name, Last Name, ID Card, Password, Social Security Number, Street Address, Tax Number, Phone Number, Username, Zipcode.

It achieves the following results on a test set of ~73,000 sentences containing PII:

• Accuracy: 99.44%
• Loss: 0.0173
• Precision: 93.16%
• Recall: 93.08%
• F1: 93.12%

Note that the above metrics factor in the eighteen possible categories (17 PII and 1 Non PII), so the metrics are lower than the metrics for just PII vs. Non PII (binary classification).

Performance by PII type

Reported performance metrics are lower than the overall accuracy of 99.44% due to class imbalance (most tokens are not PII). However, the model is more useful than the below results suggest, due to the intent behind PII detection. The model sometimes misclassifies one PII type for another, but at the end of the day, it still recognizes the token as PII. For instance, the model often confuses first names for last names, but that's fine because it still flags the name as PII.

Entity	Precision	Recall	F1-Score	Support
ACCOUNTNUM	0.84	0.87	0.85	3575
BUILDINGNUM	0.92	0.90	0.91	3252
CITY	0.95	0.97	0.96	7270
CREDITCARDNUMBER	0.94	0.96	0.95	2308
DATEOFBIRTH	0.93	0.85	0.89	3389
DRIVERLICENSENUM	0.96	0.96	0.96	2244
EMAIL	1.00	1.00	1.00	6892
GIVENNAME	0.87	0.93	0.90	12150
IDCARDNUM	0.89	0.94	0.91	3700
PASSWORD	0.98	0.98	0.98	2387
SOCIALNUM	0.93	0.94	0.93	2709
STREET	0.97	0.95	0.96	3331
SURNAME	0.89	0.78	0.83	8267
TAXNUM	0.97	0.89	0.93	2322
TELEPHONENUM	0.99	1.00	0.99	5039
USERNAME	0.98	0.98	0.98	7680
ZIPCODE	0.94	0.97	0.95	3191
micro avg	0.93	0.93	0.93	79706
macro avg	0.94	0.93	0.93	79706
weighted avg	0.93	0.93	0.93	79706

Intended uses & limitations

Piiranha can be used to assist with redacting PII from texts. Use at your own risk. We do not accept responsibility for any incorrect model predictions.

Training and evaluation data

Training procedure

Training hyperparameters

The following hyperparameters were used during training:

• learning_rate: 5e-05
• train_batch_size: 128
• eval_batch_size: 128
• seed: 42
• optimizer: Adam with betas=(0.9,0.999) and epsilon=1e-08
• lr_scheduler_type: linear
• lr_scheduler_warmup_ratio: 0.05
• num_epochs: 5
• mixed_precision_training: Native AMP

Training results

Training Loss	Epoch	Step	Validation Loss	Precision	Recall	F1	Accuracy
0.2984	0.0983	250	0.1005	0.5446	0.6111	0.5759	0.9702
0.0568	0.1965	500	0.0464	0.7895	0.8459	0.8167	0.9849
0.0441	0.2948	750	0.0400	0.8346	0.8669	0.8504	0.9869
0.0368	0.3931	1000	0.0320	0.8531	0.8784	0.8656	0.9891
0.0323	0.4914	1250	0.0293	0.8779	0.8889	0.8834	0.9903
0.0287	0.5896	1500	0.0269	0.8919	0.8836	0.8877	0.9907
0.0282	0.6879	1750	0.0276	0.8724	0.9012	0.8866	0.9903
0.0268	0.7862	2000	0.0254	0.8890	0.9041	0.8965	0.9914
0.0264	0.8844	2250	0.0236	0.8886	0.9040	0.8962	0.9915
0.0243	0.9827	2500	0.0232	0.8998	0.9033	0.9015	0.9917
0.0213	1.0810	2750	0.0237	0.9115	0.9040	0.9077	0.9923
0.0213	1.1792	3000	0.0222	0.9123	0.9143	0.9133	0.9925
0.0217	1.2775	3250	0.0222	0.8999	0.9169	0.9083	0.9924
0.0209	1.3758	3500	0.0212	0.9111	0.9133	0.9122	0.9928
0.0204	1.4741	3750	0.0206	0.9054	0.9203	0.9128	0.9926
0.0183	1.5723	4000	0.0212	0.9126	0.9160	0.9143	0.9927
0.0191	1.6706	4250	0.0192	0.9122	0.9192	0.9157	0.9929
0.0185	1.7689	4500	0.0195	0.9200	0.9191	0.9196	0.9932
0.018	1.8671	4750	0.0188	0.9136	0.9215	0.9176	0.9933
0.0183	1.9654	5000	0.0191	0.9179	0.9212	0.9196	0.9934
0.0147	2.0637	5250	0.0188	0.9246	0.9242	0.9244	0.9937
0.0149	2.1619	5500	0.0184	0.9188	0.9254	0.9221	0.9937
0.0143	2.2602	5750	0.0193	0.9187	0.9224	0.9205	0.9932
0.014	2.3585	6000	0.0190	0.9246	0.9280	0.9263	0.9936
0.0146	2.4568	6250	0.0190	0.9225	0.9277	0.9251	0.9936
0.0148	2.5550	6500	0.0175	0.9297	0.9306	0.9301	0.9942
0.0136	2.6533	6750	0.0172	0.9191	0.9329	0.9259	0.9938
0.0137	2.7516	7000	0.0166	0.9299	0.9312	0.9306	0.9942
0.014	2.8498	7250	0.0167	0.9285	0.9313	0.9299	0.9942
0.0128	2.9481	7500	0.0166	0.9271	0.9326	0.9298	0.9943
0.0113	3.0464	7750	0.0171	0.9286	0.9347	0.9316	0.9946
0.0103	3.1447	8000	0.0172	0.9284	0.9383	0.9334	0.9945
0.0104	3.2429	8250	0.0169	0.9312	0.9406	0.9359	0.9947
0.0094	3.3412	8500	0.0166	0.9368	0.9359	0.9364	0.9948
0.01	3.4395	8750	0.0166	0.9289	0.9387	0.9337	0.9944
0.0099	3.5377	9000	0.0162	0.9335	0.9332	0.9334	0.9947
0.0099	3.6360	9250	0.0160	0.9321	0.9380	0.9350	0.9947
0.01	3.7343	9500	0.0168	0.9306	0.9389	0.9347	0.9947
0.0101	3.8325	9750	0.0159	0.9339	0.9350	0.9344	0.9947

Framework versions

• Transformers 4.44.2
• Pytorch 2.4.1+cu121
• Datasets 3.0.0
• Tokenizers 0.19.1