Privacy Budget
Definition
A privacy budget limits the accounted loss in differential privacy.
A fixed upper limit for the privacy loss accounted according to the composition rules of differential privacy, typically expressed as epsilon and optionally delta.
Simply explained
A defined framework sums how much multiple protected evaluations consume the guaranteed privacy.
Why it matters in practice
The term supports companies in selecting technologies sensibly, anchoring them organizationally, and using them competently.
Example from business
An analysis system accounts for how multiple differentially private queries consume the set epsilon-delta budget.
Limits and pitfalls
- Representing epsilon alone as an intuitive risk percentage, omitting delta, or not documenting composition methods and threat model.
Origin & history
The composition theory of differential privacy made privacy budgets necessary for repeated queries.
Use in mid-sized companies
- Possible example: An analysis system accounts for how multiple differentially private queries consume the set epsilon-delta budget.
Frequently asked questions
What does privacy budget mean?
A fixed upper limit for the privacy loss accounted according to the composition rules of differential privacy, typically expressed as epsilon and optionally delta. What mistakes should be avoided? Representing epsilon alone as an intuitive risk percentage, omitting delta, or not documenting composition methods and threat model.
Sources
Source checked on 10.10.2026. Editorial application examples are hypothetical; no evidence of real customer results.
Editorially reviewed on: