CRM'de veri maskeleme tasarlamak: Rol bazlı görünüm, sunucu tarafı maskeleme, açma kaydı ve test ortamı için tokenizasyon

Every party member who opens a real estate sales CRM screen should not see the same thing. A new representative at the call center needs a phone number to search for a lead, yet there's no need for them to see that number in a list. A marketing analyst looking at campaign performance shouldn't know anyone's phone number. An integration partner's support team reviewing code shouldn't see real email addresses.

From my perspective as Koray Yalçın, focusing on lead management and CRM setup, this separation of data is the most commonly overlooked security layer: who sees what, how much, and when. Data masking hides parts of personal data to prevent unauthorized or excessive exposure. A common example is showing a phone number as 0532***1234.

This article explores the concept from a developer's viewpoint, covering where to mask, how to store rules as data, what should appear behind the "hide" button, secure data export and logging, and how to prevent data leakage in test environments. Masking is different from encryption and authorization. Authorization determines if a user can access a record, while encryption protects data at rest and in transit.

Masking decides what information is visible to a user. Authorization decides if a user can access a record, while encryption protects data at rest and in transit. Masking decides what information is visible to a user.