Operational Security (OpSec) is the practice of protecting sensitive information. In the context of amateur radio, OpSec involves taking measures to safeguard your personal information, location, and communication activities.

Key OpSec considerations for amateur radio operators include:

• Understand Your Personal Information Exposure
  Your callsign acts as a public link to your real name and home address through public regulatory databases.
• Use a PO Box: Avoid using your home address on your FCC license registration. Use a P.O. Box or a commercial mail receiving agency.
• Portable/Mobile Usage: When operating away from home, use portable designators (e.g., /P or /M) and avoid broadcasting your specific geographic coordinates or landmarks on the air.
• Callsign Privacy: Avoid sharing your callsign publicly on social media or online forums to prevent tracking.

Communication Discipline

Because amateur radio is legally required to be "in the clear" without encryption, anyone with a receiver can listen to your conversation.
Use Minimum Power:
Transmit using only the power required to make the contact. This limits the geographic footprint of your signal and prevents someone from easily triangulating your position.
Never Transmit Encryption:
True encryption is strictly illegal on ham radio bands. Avoid using coded "tacticool" lingo that draws unwanted attention.
Avoid Discussing Assets:
Do not broadcast details about your personal security measures, caches, or the presence of valuable gear in your home.
Use Code Words:
If you need to discuss sensitive topics, use pre-arranged code words that only your trusted contacts understand. This adds a layer of obscurity to your communications without violating legal requirements.

Digital OpSec

Your presence on the airwaves isn't limited to voice or Morse code; Digital logging networks leave a searchable trace.
Review Digital Logbooks:
Platforms like QRZ.com, LoTW (Logbook of The World), and eQSL can log exactly when and where you made a contact. Adjust your settings to limit how much personal detail is visible to unregistered users.
Disable Location Services:
If you are uploading photos of your setup or using APRS(Automatic Packet Reporting System) mapping, make sure you aren't leaking your exact home.