Input Validation / Input Flexibility
Kind: tension
Record: tension:input-flexibility-input-validation
Canonical: Schema
"input-validation" (security-core layer) is traded against "Input Flexibility" (security-core layer) — a principle cannot be scope-separated from a quality, metric, or cost it competes with; resolve by measuring "Input Flexibility" and choosing an explicit operating point.
Listed in Tensions, after Attribute-Based Access Control (ABAC) / Policy Complexity and before Output Encoding / Formatting Flexibility.