An SMT solver checks whether a logical formula can be satisfied while respecting theories such as equality, sets, strings, numbers, and other structured domains. In authorization, symbolic policy analysis turns the full space of principals, actions, resources, contexts, and relationships into formulas that the solver can examine. section 7.4.6
Finding an authorization counterexample
Instead of testing only whether Alice can approve invoice 123, symbolic analysis can ask whether any principal outside Finance can approve any invoice. The solver may return a concrete counterexample, such as an unmanaged device reaching a deployment action, or show that a policy refactoring changed permissions. section 7.4.6
Authorization analysis uses SMT solving to:
- Compare policy sets and identify inconsistencies, redundancies, or logical errors. section 7.4.6
- Check whether policy properties hold across all schema-defined requests rather than selected test cases. section 7.4.6
