Flurry v 4.2.3 linking issues
You need to add Security.framework because the symbols mentioned in the linker error are from that framework.
From Flurry update page
How do I update?
Download the latest version of Flurry’s SDK (version 4.2.3) here. Include Apple’s Security Framework in your build process. (see the FAQ entry below for details on how to do this)
Is the "Security" framework mandatory?
To ensure the integrity of your data, Flurry requires that you include this framework in your updated app.