Final answer:
The best solution to recommend is implementing Single Sign-On (SSO) to help manage the complexity of multiple passwords and enhance security management & safeguards in the organization.
Step-by-step explanation:
The best solution for the information security officer to recommend would be implementing Single Sign-On (SSO). SSO reduces password fatigue for employees by allowing them to log in with a single set of credentials to access a suite of applications. It streamlines the authentication process, thereby increasing security and efficiency within the human resources department. This solution ensures security management & safeguards by limiting the chances of password mismanagement that can occur with written credentials.
While Multi-Factor Authentication (MFA) and protocols like SAML (Security Assertion Markup Language) can also increase security, the primary issue here is the multiple passwords and differing complexity requirements, which SSO specifically addresses.