Brass Tacks
Question
Does this person meet the minimum age requirement?
How
Compares your actual age against the threshold using a greater-than gate — outputs true/false.
Privacy
Your exact age stays private. The verifier only learns: yes or no.
Age Verification
★ BeginneridentityProve you meet a minimum age requirement without revealing your actual age. The verifier learns only that you are old enough — your exact age stays private.
identityagekycprivacy
Circuit Definition
Gates
gtuser_age>minimum_age
Public inputs
minimum_age
integer
Private inputs
user_age
integer · hidden
Test Vectors
Adult over 18
valid
Exactly 19
valid
Minor (16)
constraint_violation
Exactly 18 (not >)
constraint_violation
MinervaFormat JSON
{
"version": "2.0",
"meta": {
"name": "Age Verification",
"description": "Prove age >= minimum",
"author": "minerva",
"created_at": "2026-03-12",
"tags": [
"identity"
]
},
"circuit": {
"gates": [
{
"type": "gt",
"left": "user_age",
"right": "minimum_age"
}
]
},
"inputs": {
"public": {
"minimum_age": 18
},
"private": {
"user_age": 25
}
}
}Ready to prove?
Supply your private inputs and generate a cryptographic proof. Verifiers can confirm validity without seeing your data.
Real-World Use Cases
- Age-gated content access without sharing your birthday
- KYC compliance: prove you're 18+ without revealing DOB
- Anonymous age-restricted service enrollment
About this template
Engine versionv2.0
Security level128-bit
DifficultyBeginner
Gates1
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