Which action improves digital security most effectively?

• A. Using strong, unique passwords and enabling two-factor authentication
• B. Sharing passwords with trusted colleagues
• C. Disabling updates to avoid disruption
• D. Using the same password across multiple sites

Answer: (A)

Protecting online accounts hinges on two layers: a robust, unique password for each site and a second factor you provide during login. A strong password—long, with a mix of letters, numbers, and symbols—makes it much harder for attackers to guess or brute-force. Using unique passwords means a breach on one site won’t unlock others because each site has its own secret. Enabling two-factor authentication adds a second barrier, such as a temporary code from an authenticator app or a hardware key, so even if someone learns your password, they still need that second factor to sign in. The combination dramatically reduces the chance of unauthorized access. In contrast, sharing passwords grants others your access, disabling updates leaves your software vulnerable to known exploits, and using the same password across sites means a single leak can compromise many accounts. For stronger security, couple a strong, unique password for each service with two-factor authentication.