do you mean hiding parts of a page ? If so, the visibility plugin might be, what you need: https://plugins.atlassian.com/plugins/net.customware.confluence.plugin.visibility
But this plugin is not suitable for hiding secure content. The whole content is indexed and can be seen in summaries and in the source view.
Two vulnerabilities have been published for Confluence Server and Data Center recently: March 20, 2019 CVE-2019-3395 / CVE-2019-3396 April 17, 2019 CVE-2019-3398 The goal of this article is...
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