What key security measure can an organization implement after a data breach to strengthen email account safety?

Implementing multifactor authentication (MFA) is a crucial security measure for organizations seeking to enhance the safety of email accounts following a data breach. MFA adds an additional layer of security by requiring users to provide two or more verification factors to gain access to their accounts. This can include something they know (like a password), something they have (like a smartphone app for generating a code), or something they are (like a fingerprint).

This added complexity significantly reduces the risk of unauthorized access, as even if a password is compromised during a data breach, the attacker would still need the secondary authentication factor to log in. This creates a substantial barrier for potential attackers, thus strengthening the overall security posture of the organization and its users' email accounts.

Other options, while beneficial in various contexts, do not directly address the immediate vulnerabilities exposed by a data breach in the same way that MFA does. For instance, Single Sign-On (SSO) can streamline login processes but may provide a single point of failure if compromised. Automatic email archiving manages data retention rather than enhancing security, and data encryption is essential for protecting data in transit or at rest but does not directly address account access mechanisms post-breach. Therefore, MFA stands out as the most effective immediate response