Model
Why removing names does not remove identity
Identity was never in the identifier column. It was spread across the whole row.
- Cardinality
- possible values of attribute i
- Population
- people in the dataset
How it behaves
One input on the horizontal axis, the others held fixed.
Data table
| Population N | Unique on these attributes |
|---|---|
| 100K | 100% |
| 115K | 100% |
| 133K | 100% |
| 154K | 100% |
| 178K | 100% |
| 205K | 100% |
| 237K | 100% |
| 274K | 100% |
| 316K | 99.9% |
| 365K | 99.9% |
| 422K | 99.9% |
| 487K | 99.9% |
| 562K | 99.9% |
| 649K | 99.9% |
| 750K | 99.9% |
| 866K | 99.9% |
| 1M | 99.8% |
| 1.15M | 99.8% |
| 1.33M | 99.8% |
| 1.54M | 99.7% |
| 1.78M | 99.7% |
| 2.05M | 99.6% |
| 2.37M | 99.6% |
| 2.74M | 99.5% |
| 3.16M | 99.5% |
| 3.65M | 99.4% |
| 4.22M | 99.3% |
| 4.87M | 99.2% |
| 5.62M | 99% |
| 6.49M | 98.9% |
| 7.5M | 98.7% |
| 8.66M | 98.5% |
| 10M | 98.3% |
| 11.5M | 98% |
| 13.3M | 97.7% |
| 15.4M | 97.4% |
| 17.8M | 97% |
| 20.5M | 96.5% |
| 23.7M | 96% |
| 27.4M | 95.4% |
| 31.6M | 94.7% |
| 36.5M | 93.9% |
| 42.2M | 93% |
| 48.7M | 92% |
| 56.2M | 90.8% |
| 64.9M | 89.5% |
| 75M | 87.9% |
| 86.6M | 86.2% |
| 100M | 84.3% |
| 115M | 82.1% |
| 133M | 79.6% |
| 154M | 76.8% |
| 178M | 73.7% |
| 205M | 70.4% |
| 237M | 66.6% |
| 274M | 62.6% |
| 316M | 58.2% |
| 365M | 53.5% |
| 422M | 48.6% |
| 487M | 43.4% |
| 562M | 38.2% |
| 649M | 32.9% |
| 750M | 27.7% |
| 866M | 22.7% |
| 1B | 18% |
| 1.15B | 13.8% |
| 1.33B | 10.2% |
| 1.54B | 7.16% |
| 1.78B | 4.76% |
| 2.05B | 2.97% |
| 2.37B | 1.72% |
| 2.74B | 0.92% |
| 3.16B | 0.445% |
| 3.65B | 0.192% |
| 4.22B | 0.073% |
| 4.87B | 0.024% |
| 5.62B | 0.007% |
| 6.49B | 0.001% |
| 7.5B | 0% |
| 8.66B | 0% |
| 10B | 0% |
Worked examples, recomputed
Every number the mechanisms quote for this relationship is recomputed from it, so none of them disagrees with it.
Where it appears
Each mechanism states it in its own names. The general symbol each name stands for is shown with it.
- Security & Privacy
How do you protect data from someone who watches your design and then chooses how to attack it?