They recently rolled out Public Whiteboards that has similar security features as Confluence Public Page.
Permissions Management: You can control who can view, edit, or comment on public whiteboards, similar to how you manage permissions for Confluence pages.
User Authentication: Whiteboards leverage Confluence's authentication mechanisms, including SSO (Single Sign-On) and 2FA (Two-Factor Authentication), to secure user access.
Data Encryption: Data within Confluence Whiteboards is encrypted both in transit and at rest, ensuring it remains secure from unauthorized access.
Audit Logs: Access and changes to public whiteboards are tracked through detailed logs, providing transparency and monitoring capabilities.
Content Restrictions: Specific restrictions can be applied to public whiteboards to limit access to sensitive information, just like with other Confluence content.