com.apple.WebKit.Networking continually asking to sign using "privateKey" Title sums it up, pretty frequently, once an hour or so at work I get a pop up asking me to "always allow" "deny", or "allow" WebKit to sign using my private keychain. At this point I've answered it pretty much all ways and it keeps coming up.

Some information that may be relevant:


I'm not logged in as an administrator, but a normal privileged user
Happens most frequently when I log in
I have to use an invalid certificate to access a certain website for work. The pop up doesn't seem correlated with that website though 
I'm on the beta release track of MacOS


Any ideas on how to make it stop? Comments about what more information I could provide would be welcome as well.
I had the same issue with my company SSO certificate, it's a known issue in MacOS Sierra 10.12

Temporary workaround available:

Open Keychain Access.
Select your login keychain and then the private key "YOUR ID/Company SSO Server" (Do not search for the item but find and select ... searching will not work properly to access the ACL option)


Open Keychain Access.
Select your login keychain and then the private key "" (Do not search for the item but find and select ... searching will not work properly to access the ACL option)
Double-click the key to show the key's info window select the tab "Access Control"
Click the + button at the bottom of the window and add /Applications/Safari.app
Click the + button at the bottom of the window and add /System/Library/Frameworks/WebKit.framework/Versions/A/XPCServices/com.apple.WebKit.Networking.xpc
Click Save Changes and authenticate to allow those changes
Quit Keychain Access.