The Minimization Principle

Data minimization is both a GDPR principle (Article 5(1)(c)) and a security best practice: collect, process, and retain only the minimum amount of personal data necessary for your stated purpose.

Every piece of data you hold is a liability: • It can be breached • It must be protected • It may be subject to access requests • It increases regulatory risk • It costs money to store and manage

The data you don't have can never be breached. This makes data minimization the most effective data protection strategy available — even more effective than encryption (though both should be used together).

Implementing Data Minimization

For Organizations: • Audit what data you collect — is each field genuinely necessary? • Set retention periods — delete data when it's no longer needed • Anonymize where possible — if you need analytics, you rarely need identifiable data • Review third-party tools — do they collect more data than necessary?

For Individuals: • Use email aliases to limit data linkage across services • Provide minimal information during registration • Regularly delete unused accounts • Choose services that practice data minimization (like ZeroLatch, which supports authenticated account registration)

For conditional delivery services: Review the data actually required to operate the service. ZeroLatch uses authenticated accounts and processes recipient addresses, schedules and operational records. File content is encrypted in the browser, with different recovery boundaries for Simple and Private. Read the privacy policy and security model rather than assuming encrypted files mean no identifying data is held.

The Minimization Mindset

Data minimization should be the default, not an afterthought:

Question every data collection: Before adding a field to a form, ask: "Do we actually need this? What's the minimum we need to achieve the goal?"

Default to anonymous: If a service works without identifying information, don't collect it.

Delete proactively: Don't wait to be asked. Set up automated deletion for data past its retention period.

Minimize metadata too: It's not just about the content — metadata (timestamps, IP addresses, device information) can be just as revealing.

The less data exists, the less there is to protect, breach, regulate, or misuse.