Infrastructure as Code (IaC) promises consistency. You define your Snowflake data masking rules in code, commit them, deploy them. But over time, differences creep in. A quick manual change in the console. A hotfix pushed without review. This is IaC drift — the moment your running Snowflake environment no longer matches the source of truth in your repository. And when masking policies are out of sync, sensitive data can slip through.
IaC drift detection in Snowflake is not optional. It is the line between secure data governance and blind exposure. Automated drift detection compares deployed masking policies against your IaC definitions at a granular level. It flags mismatches fast, so you can restore alignment before the gap becomes a security incident.
Snowflake data masking protects confidential data by dynamically obfuscating values based on policy. With role-based masking, finance teams see actual figures while others see masked placeholders. But these rules must be consistent across environments. Drift breaks that consistency. You might think you have masking in place, but if the production schema differs from the code, the mask may not apply.