An organization's staff is distributed across varying locations, each with varying levels of network security. To strengthen their security posture for collaborative efforts, which measure would be most effective in ensuring authorized access to shared company resources?
Enforce a policy requiring users to change their passwords monthly.
Mandate email encryption for all internal and external communication.
Limit the connection times to shared resources to specific hours of the working day.
Implement multi-factor authentication for all users when accessing shared company resources.
Implementing multi-factor authentication (MFA) provides a powerful defense against unauthorized access, as it requires users to provide two or more verification factors to gain access to resources, thus protecting against compromised credentials. Email encryption is a security measure that protects the contents of emails but does not secure access to collaboration tools and resources. While limiting connection times could potentially reduce the window of opportunity for an attack, it would not be practical for collaboration needs and does not strengthen authentication methods. The frequency of changing passwords, without the additional step of verifying the user's identity, may be less effective against sophisticated attacks.
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