Which practice is most secure when handling access codes?

• A. Write down in a visible place.
• B. Memorize the code and avoid writing down.
• C. Share with trusted colleagues.
• D. Post on bulletin board.

Answer: (B)

Keeping access codes secret means avoiding any visible trace of them. When you memorize the code and don’t write it down, there’s no physical note or document that someone could stumble upon, steal, or copy. Writing the code somewhere visible—like on a sticky note, a whiteboard, or a posted log—creates a tangible risk that others can find and use, intentionally or by accident. Sharing with others—even with trusted colleagues—expands the number of people who know the code, increasing the chance of exposure or misuse. Posting the code publicly is obviously insecure. So memorizing the code minimizes exposure and keeps control tightly in your hands, which is why it’s the most secure practice among the options.