Which of the following is NOT an anti-forensics technique?

Data deduplication is an optimization technique used to eliminate redundant copies of data primarily for storage efficiency and performance, and it does not inherently aim to hide or destroy forensic evidence.

Steganography is an anti-forensics technique that involves hiding data within other seemingly innocuous files, making it difficult for investigators to detect the hidden information.

Encryption is an anti-forensics technique used to make data unintelligible without the correct key, thereby preventing unauthorized access to its contents during an investigation.

Password protection is an anti-forensics technique that restricts access to files, systems, or archives, requiring a password to view or modify data, thus obstructing forensic analysis.