How often should passwords on computers be changed?

Changing passwords regularly is essential for maintaining security, particularly for systems that handle sensitive information. The recommendation of changing passwords every 90 days balances security and usability effectively. This time frame is often suggested as it allows users to stay vigilant against potential security breaches without being overly burdensome.

Frequent password changes can help mitigate the risks associated with unauthorized access, especially in environments where there may be attempts to guess or crack passwords. By changing passwords every 90 days, users significantly reduce the time window during which a compromised password could be exploited.

Longer intervals, such as 6 months or a year, may not provide adequate protection, especially as cyber threats continually evolve. Therefore, the 90-day guideline aligns with best practices in cybersecurity to help safeguard sensitive information and maintain the integrity of computer systems.