Comment on "Unique in the shopping mall: On the reidentifiability of credit card metadata"

Area of Science:

• Data privacy
• Information security
• Computer science

Background:

• A previous study claimed most individuals can be reidentified from deidentified transaction data.
• This study challenges the effectiveness of current anonymization mechanisms against reidentification.

Purpose of the Study:

• To demonstrate the efficacy of established anonymization techniques.
• To counter the assertion that deidentified transaction data is not secure.

Main Methods:

• Utilizing well-established anonymization techniques from existing literature.
• Applying these methods to transaction databases.

Main Results:

• Anonymization was successfully performed using established techniques.
• Demonstrated that effective anonymization is achievable.

Conclusions:

• Anonymization mechanisms are effective against reidentification when properly applied.
• Established literature-based techniques provide robust data privacy for transaction databases.