Privacy controls implemented

Author: Privacy, Authentication, and Data Handling

Author: entication

• Audio anonymization: anonymize_audio_add_noise(wave, snr_db) — adds Gaussian noise to audio to reduce identifiability.
• Audio prefix masking: mask_audio_zero_first_seconds(wave, sample_rate, seconds) — zeroes the first N seconds.
• Face blur: blur_frames(frames) — coarse Gaussian blur applied per-frame (uses OpenCV if available).

API usage: - /process supports query body flags anonymize_audio, mask_audio_prefix_s, blur_faces. - /submit accepts the same flags; they are persisted with the job and applied by the background worker.

Data retention / storage

• Job store defaults to JSON-file fallback; for production use a secure Redis or DB with TTL and access controls.
• Implement automatic deletion of stored media and results after a retention period.

Legal / compliance notes

• These simple transforms do not guarantee legal anonymization under GDPR or other regimes — consult legal/privacy experts for real deployments.