Abhishek Jain created RANGER-5144:
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Summary: [Column Masking] : Exposing Data Secrecy by Displaying
lowercase/uppercase patterns in Masked Column Data
Key: RANGER-5144
URL: https://issues.apache.org/jira/browse/RANGER-5144
Project: Ranger
Issue Type: Bug
Components: Ranger
Affects Versions: 2.4.0
Reporter: Abhishek Jain
The data secrecy is exposed by displaying the lowercase/uppercase pattern when
the column masking is applied.
Each uppercase letter in a string is masked with 'X' (capital 'X') and each
lowercase letter is masked with 'x' (small 'x') which exposes the datapattern
in that column.
{_}*Example*{_}:
{code:java}
ABHIshek -> XXXXxxxx
abhishek -> xxxxxxxx
{code}
The masking rule should be uniform for both lower/upper case letters.
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