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Masking Types

ALTR supports several out-of-the-box masking types for column and tag policies as well as the ability to customize masking behavior. Learn more.

Refer to the following table for the supported masking types and details, including the associated ID included in the API .

Masking Type

Strategy ID (Management API)

Description

Supported Data Types

Example

No Mask

10000

Users see the original data

All

Before: Georgia

After: Georgia

Show Last Four

10003

Users only see the last 4 characters of the data

String

Before: 1111-11-1234

After: ****-**-1234

E-Mail

10002

Users only see data to the right of the @ symbol

String

Before: jane@example.com

After: ****@example.com

Full Mask

10001

Users only see the length of the data

String

Before: Georgia

After: *******

Constant Mask

10004

Data is replaced with a single value based on the column’s data type:

  • Numbers mask to 1

  • Strings mask to *

  • Datetime mask to 1/1/2000 00:00:00 UTC

    (You may see different values depending on the specific data type and time zone conversion.)

  • String

  • Number

  • Datetime

Before: Georgia

After: *

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